Question 1

Is PEG-1000/1500 harmful to humans? Does it have an impact on the environment?

Accepted Answer

PEG-1000/1500 is a low-toxicity substance, relatively safe for humans under normal use conditions, but has certain irritation to skin, eyes, and respiratory tract; it has good biodegradability in the environment and overall low ecological risk. Detailed Explanation The acute oral toxicity of PEG-1000/1500 (polyethylene glycol 1000/1500) is extremely low. It is widely used in pharmaceutical preparations, cosmetics, and personal care products, which require high safety standards. Its good biocompatibility has been verified through long-term use. However, this does not mean it is completely harmless— under conditions of direct contact or high concentration exposure, it may still cause local irritation reactions in humans. According to the GHS classification in the product SDS (based on EU CLP regulation), PEG-1000/1500 is classified as: Skin corrosion/irritation Category 2 (H315: Causes skin irritation), Serious eye damage/eye irritation Category 2 (H319: Causes serious eye irritation), and Specific target organ toxicity, single exposure Category 3 (H335: May cause respiratory irritation). The old EU regulation also labeled it as an irritant (Xi), with risk phrases R36/37/38 (irritating to eyes, respiratory system and skin). Therefore, appropriate personal protective measures should be taken during operation. In terms of the environment, polyethylene glycol compounds are generally considered to have good biodegradability, can be gradually degraded by microorganisms in the natural environment, and do not significantly accumulate in organisms. Their acute toxicity to aquatic organisms is low, and under normal use and discharge conditions, they do not cause significant harm to aquatic ecosystems. However, it should be noted that large-scale spills or improper discharge may still cause local environmental burden, and waste should be properly disposed of in accordance with local regulations. Summary of Human Safety Exposure RouteRisk LevelDescription Oral ingestionLow riskAcute oral toxicity is extremely low; pharmaceutical grade PEG is widely used as an excipient in oral formulations. Skin contactModerate irritation riskMay cause mild skin irritation (H315); prolonged or repeated contact recommends wearing protective gloves. Eye contactHigher irritation riskMay cause serious eye irritation (H319); chemical safety goggles should be worn during operation. InhalationModerate irritation riskDust or vapor may cause respiratory irritation (H335); good ventilation should be maintained. Summary of Environmental Safety Environmental ctorImpact assessmentDescription Aquatic toxicityLow toxicityAcute toxicity to aquatic organisms such as fish, algae, and daphnia is low. BiodegradabilityDegradableCan be gradually degraded by microorganisms, not easily persist in the environment. BioaccumulationLow accumulation riskHigh water solubility, low octanol/water partition coefficient, not easily accumulated in organisms. Soil impactMinor impactCan be degraded by microorganisms in soil, will not cause soil pollution under normal use. Application Recommendations In cosmetic and pharmaceutical applications, the usage concentration of PEG-1000/1500 is usually subject to rigorous safety assessments, and the risk in finished products is extremely low. However, during industrial production operations (such as feeding, weighing, mixing, etc.), special attention should be paid to dust control and personal protection. Waste disposal should follow local environmental regulations; it is not recommended to discharge directly into surce waters. In case of large spills, they should be collected and disposed of by qualified waste treatment agencies. Precautions Operations must be carried out in a well-ventilated area, with local exhaust ventilation if necessary. Wear chemical safety goggles and protective gloves (nitrile rubber or neoprene recommended). In case of eye contact, immediately flush with plenty of water and seek medical attention (safety phrase S26). No eating, drinking, or smoking in the work area; thoroughly wash exposed skin after operation. Although acute toxicity is low, avoid prolonged, high-concentration, unprotected occupational exposure. Environmental ecotoxicity data is relatively limited; there are no records of this product being listed as a persistent organic pollutant (POP) or substance of very high concern (SVHC).

Question 2

What should I do if problems occur during the use of PEG-1000/1500? How to get technical support?

Accepted Answer

When encountering problems during the use of PEG-1000/1500, it is recommended to first conduct preliminary troubleshooting, and then obtain professional technical support through official channels of Guoli Chemical. Detailed Explanation During the use of PEG-1000/1500 (Polyethylene Glycol 1000/1500), if you encounter abnormal product performance or process issues, first do not panic. This product is a nonionic surctant with stable chemical properties. Most usage problems usually stem from improper storage conditions, unreasonable formulation compatibility, or process parameter deviations, rather than the product's own quality issues. It is recommended that you follow the troubleshooting process below to gradually locate the problem. If the problem is still not resolved after self-troubleshooting, Hai'an Guoli Chemical Co., Ltd. provides comprehensive technical support services for customers. Our technical team consists of experienced chemical engineers who have a deep understanding of the physical and chemical properties, application formulations, and processing techniques of the PEG series products, and can provide professional solutions for specific application scenarios in different industries. Troubleshooting Steps Step 1: Check Product Appearance and Storage Status Normal status: PEG-1000/1500 should be a white waxy solid or flakes, without discoloration or odor. Abnormal situation: If the product appears caked, discolored (yellowish), has an odor, or is damp, it may be due to improper storage conditions. This product should be stored in a cool, dry, well-ventilated warehouse, avoiding direct sunlight and humid environments. Step 2: Check Usage Conditions and Formulation pH environment: PEG-1000/1500 remains stable over a wide pH range, but extreme acidic or alkaline conditions may affect performance. Temperature Control: Processing temperature should be within a reasonable range to avoid decomposition due to overheating. Formulation Compatibility: Check if it is used together with strong oxidizers or other incompatible substances; this product should be kept away from strong oxidizers. Step 3: Analyze Specific Application Issues Poor emulsification/dispersion effect: Check if the dosage is sufficient, whether the oil-water ratio is reasonable, and whether other surctants need to be compounded. Insufficient solubilization effect: Confirm the characteristics of the target substance, consider adjusting the PEG molecular weight specification (PEG-1000 and PEG-1500 have different molecular weights and performance differences). Insufficient wetting/penetration power: Evaluate the system temperature and viscosity, and adjust process parameters if necessary. Ways to Obtain Technical Support Hai'an Guoli Chemical Co., Ltd. provides multi-channel technical support services: Phone consultation: Directly call Guoli Chemical's official customer service hotline to communicate specific issues with technical engineers (for specific contact information, please visit the official website or check the contact information on the product packaging). Online technical support: Submit issues through the official website's online customer service or technical consultation portal, attaching the product batch number, usage conditions, and problem description. The technical team will respond within working days. Email support: Send a detailed problem description, on-site photos, or videos to the company's technical email for engineers to conduct in-depth analysis. Sample analysis: If the problem is complex, send the problematic batch sample to Guoli Chemical's quality control center for physical and chemical index testing to help determine the root cause. On-site technical service: For major technical issues or batch application needs, you can arrange for a technical engineer to perform on-site diagnosis and process guidance. Preparation Suggestions Before Contacting Technical Support Provide the product batch number and production date (usually on the packaging bag) to trace product quality information. Describe the usage conditions in detail: including temperature, pH, formulation composition, dosage, process flow, etc. Explain the specific problem phenomenon: It is best to attach comparative photos or data to help the technical team quickly determine the issue. Prepare the Safety Data Sheet (SDS) for the product to ensure that technical solutions are discussed within a safety framework. Precautions During the troubleshooting process, continue to follow safety operating procedures: Wear chemical safety goggles and protective gloves (such as nitrile or neoprene gloves), operate in a well-ventilated area, and avoid skin and eye contact with the product. If accidental contact occurs, skin irritation (H315) should be rinsed with plenty of water, and eye contact (H319) should be immediately flushed with plenty of water and seek medical attention. For detailed safety information, be sure to refer to the product SDS.

Question 3

How to purchase PEG-1000/1500? What is the minimum order quantity?

Accepted Answer

To purchase PEG-1000/1500, please contact Guoli Chemical sales team for the latest quotation. The minimum order quantity is usually based on the packaging specification. How to purchase PEG-1000/1500 is a regular product of Guoli Chemical. The procurement process is as follows: Contact the sales team: Call the official sales hotline of Guoli Chemical or send an inquiry email, providing the required specification (PEG-1000 or PEG-1500), quantity, and application. Confirm parameters: Confirm product specifications (molecular weight 1000 or 1500), packaging form, and current batch technical indicators with the sales team. Get quotation: The sales team will provide a formal quotation based on the order quantity, packaging method, and delivery address. Sign contract: After confirming the order, both parties sign a purchase and sales contract, and arrange production and delivery. Packaging specifications and order quantity Packaging formSpecificationDescription Plastic drum50kg/drumSuitable for small to medium batch procurement, easy to handle and use. Plastic drum200kg/drumSuitable for medium to large batch procurement, more cost-effective. IBC toteApproximately 1000kg/toteSuitable for large batch industrial users, reducing packaging and transportation costs. The minimum order quantity is generally based on the smallest individual package (e.g., 1 drum of 50kg). The specific minimum quantity may be adjusted according to inventory and logistics arrangements. Bulk orders can enjoy tiered pricing discounts. The actual details are subject to confirmation by the sales team. Price description The price of PEG-1000/1500 is affected by ctors such as raw material market conditions, order quantity, packaging form, and transportation distance. For real-time quotation, please contact the Guoli Chemical sales team. Database reference records show that the price unit is CNY/ton. The final transaction price is subject to the contract signed by both parties. Selection suggestions PEG-1000: Molecular weight approximately 1000, lower melting point, suitable for formulations requiring higher softness and flowability, such as cosmetics and ointment bases. PEG-1500: Molecular weight approximately 1500, slightly higher melting point, greater hardness, more suitable for suppository bases, hot melt adhesives, and industrial applications requiring higher melting points. If you are unsure which specification to choose, you can provide the specific application scenario when contacting the sales team, and the technical staff will help recommend. Warm tips Sample request: If you need a sample, you can apply to the sales team for a free sample for testing and verification. Storage conditions: After receiving the product, store it in a cool, dry, well-ventilated warehouse, away from direct sunlight and high temperatures. Technical support: Guoli Chemical provides application technology consulting services to help you optimize formulations and usage processes.

Question 4

Does PEG-1000/1500 meet environmental requirements? Can a test report be provided?

Accepted Answer

PEG-1000/1500 has good environmental characteristics and is an environmentally friendly chemical product; regarding the test report, there is currently no online download link for a specific report in the database. It is recommended to directly contact the sales department of Guoli Chemical to obtain the COA (Certificate of Analysis) and environmental compliance declaration documents for the latest batch of products. Detailed description of environmental characteristics PEG-1000/1500 (Polyethylene Glycol) performs well in environmental protection, which is closely related to its chemical nature. As a non-ionic polymer, its main chain consists of C-O single bonds, and its biodegradability is significantly better than traditional petrochemical plasticizers or solvents. The product database shows that its heavy metal content is ≤10ppm and arsenic content is ≤2ppm, r below regulatory limits. This data directly reflects its high purity and low environmental accumulation risk. Combined with its widespread application areas covering strict industries such as pharmaceuticals and cosmetics, its identity has confirmed its high safety in metabolic pathways. From an ecotoxicological perspective, this product has extremely low acute oral toxicity and will not cause acute harm to aquatic organisms during normal use. Its GHS classification is only limited to "Skin irritation Category 2" and "Eye irritation Category 2", with no aquatic toxicity classification and no PBT/vPvB persistent characteristics. This means that when combined with wastewater treatment processes in end applications, PEG-1000/1500 will not persist in the environment, and its impact on the ecosystem is completely within controllable range. Compliance status and guidance for obtaining test reports Based on its "good thermal stability" and "chemical stability" characteristics within its processing temperature range, this product will not degrade to produce toxic or harmful gases or residues during use, which aligns with the green production orientation of VOC emission restrictions. However, it should be clearly pointed out: the current product database of Guoli Chemical lacks certification snapshots or real-time download links for environmental certifications (such as RoHS, REACH compliance). Each batch of products produced in the ctory will be issued with an inspection certificate that meets national standards, including specific monitoring indicators such as pH value, moisture content, and solid content. In actual procurement, the practice to ensure strict compliance is to request the batch test report (COA) from Guoli Chemical. This report will confirm whether the product meets the purity requirements of the EU EU 1223/2009 Cosmetics Regulation or pharmacopoeia corresponding grades. For export orders, additional testing for RoHS ten items, halogen content, and REACH Substances of Very High Concern (SVHC) can be requested. It is recommended that customers directly contact the technical or after-sales team of Guoli Chemical based on the regulatory registration requirements of the final application to obtain legally effective official environmental test certificates. Technical parameters Parameter itemSpecification indexEnvironmental significance Total heavy metals≤10 ppmLow bioaccumulation risk Arsenic (As)≤2 ppmLow toxicity at water-soil interce Moisture≤1.0%High purity, reducing ineffective dissipation Acid value≤0.5 mgKOH/gStrong chemical inertness, not easily decomposed Flash point>240℃Low risk during transportation and storage, non-flammable GHS environmental hazardNoneNot classified as hazardous to the environment Application suggestions Based on the environmentally friendly nature of "low toxicity and safety" and "chemical inertness", this product is particularly suitable for green formulation design – as a preservative-alternative moisturizing system in cosmetics, as a non-animal-derived excipient in pharmaceuticals, and as a replacement for phthalate plasticizers in coatings. Wastewater from textile sizing processes can be decomposed through conventional biochemical treatment, greatly reducing the treatment costs of end-use ctories. Precautions Although the product itself is environmentally friendly, a large amount of dust entering water during operation can instantly consume dissolved oxygen (increasing BOD). Large-scale use should be equipped with dissolved sedimentation treatment units. Environmental test reports should be separately requested for routine ctory COA and specialized SGS/TUV international compliance test reports, and should not be confused. Raw material storage should follow cool, dry, and closed management to prevent moisture absorption leading to microbial growth and indirectly producing odorous waste.

Question 5

What are the advantages of PEG-1000/1500 compared to other similar products?

Accepted Answer

According to the technical data from Guoli Chemical, PEG-1000/1500, as a nonionic polyethylene glycol series product, has its main advantages reflected in three aspects: clear molecular weight control, excellent chemical stability, and broad application safety.Compared with some similar polyethylene glycol products on the market, the PEG-1000/1500 produced by Guoli Chemical has more explicit data support in terms of core characteristics and application adaptability.Detailed explanation:1. Process and batch stability:This product is a nonionic surctant with a specific molecular weight distribution range, and has clear hydroxyl value and molecular weight indicators. Compared with products having a wider molecular weight distribution, PEG-1000/1500 can provide more stable emulsification, dispersion, and solubilization effects, ensuring that customers produce products of uniform quality in precision formulations such as pharmaceuticals and cosmetics.2. Quality grade and high safety:PEG-1000/1500 from Guoli Chemical is not only suitable for industrial fields but can also reach the pharmaceutical excipient level. With extremely low acute oral toxicity, good biocompatibility, and chemical inertness, it has obvious advantages in the pharmaceutical industry (e.g., ointment bases, suppository bases) and personal care products (e.g., humectants, lubricants), providing a very high safety endorsement for end products.3. Multi-field compatibility:This product is resistant to acid, alkali, and hard water over a wide pH range, and is compatible with various organic solvents, other types of surctants, and polymer materials. In industries such as textiles, rubber, and coatings, it can serve as a high-performance lubricant, mold release agent, or antistatic agent without causing system stratification or ilure.Specific technical parameters and application data:| Characteristic Dimension | PEG-1000/1500 Specific Performance | Comparison Advantage Description || :--- | :--- | :--- || Physical form | White waxy solid or flakes | The form is convenient for weighing and feeding; compared to liquid counterparts, it has an advantage in solid preparations (e.g., tablets, suppositories). || Emulsifying dispersibility | Effectively reduces intercial tension | Promotes uniform mixing of oil and water phases, significantly improving the long-term stability of emulsions and suspension systems. || Chemical stability | Resistant to acid, alkali, and hard water | Widely applicable, unaffected by water quality or frequent pH fluctuations in the system, reducing the risk of formulation ilure. || Hydroxyl value/Molecular weight | Has a clear molecular weight distribution range | Compared to common polyethers without clear molecular weight indicators, it is irreplaceable in scenarios requiring precise control of melting point and solubility. || Safety | Extremely low acute oral toxicity, meets pharmaceutical excipient standards | Can be directly used in ointment bases, suppository bases, dropping pill bases and high-end cosmetics; this is a core advantage not possessed by ordinary industrial-grade polyethylene glycol. || Melting point range | Has appropriate melting and freezing points | When used as a suppository base, it can quickly melt and release drugs at body temperature; as a hot melt adhesive additive, it can precisely adjust the open time. |Application suggestions:- Pharmaceutical industry: Preferentially choose PEG-1500 as an ointment base (water-soluble, easy to clean) or suppository carrier (suitable melting point, also has water absorption and dispersion ability). When used as a wet granulation binder, it is recommended to add it in the form of an aqueous or alcohol solution, with the dosage typically being 1%-5% of the dry powder weight.- Cosmetics industry: Recommend PEG-1000 for creams and cleansing products, leveraging its moisturizing and lubricating effects to impart a smooth skin feel; the general addition amount is 1%-10%.- Industrial manucturing: In rubber and plastic processing, when used as a high-efficiency mold release agent, it is recommended to prepare a 5%-20% aqueous solution for spraying on the mold, which can significantly improve the surce finish of the product.Precautions:Although this product is a low-toxicity substance, GHS classification should be referenced during operation. Direct contact with powder or flakes may cause mild skin irritation (H315) and serious eye irritation (H319). It is recommended to wear chemical safety goggles and nitrile gloves when feeding to avoid dust generation. In case of eye contact, immediately rinse with plenty of water and seek medical attention.

Question 6

How to store PEG-1000/1500? What is the shelf life?

Accepted Answer

PEG-1000/1500 should be stored in a cool, dry, and well-ventilated environment, sealed in moisture-proof packaging. Under recommended storage conditions, the product has a stable shelf life. Detailed Description PEG-1000/1500 (polyethylene glycol) is a nonionic surctant, appearing as a white waxy solid or flakes with some hygroscopicity. Proper storage methods are crucial for maintaining product performance and extending service life. According to the product technical specifications of Guoli Chemical, this product is shipped with moisture-proof sealed packaging. Users should ensure the packaging is intact upon receipt. After opening, unused product should be resealed promptly to prevent moisture absorption and contamination. The storage environment must meet the following conditions: The warehouse should be kept cool, dry, and well-ventilated, avoiding direct sunlight. Although PEG-1000/1500 has excellent thermal and chemical stability, and does not decompose or discolor within reasonable processing temperature ranges, it is still recommended to keep the storage environment temperature within an appropriate range, avoiding extreme high temperatures or drastic temperature fluctuations. At the same time, the product should be kept away from incompatible substances such as strong oxidizing agents to prevent accidental reactions. Regarding the shelf life, PEG-1000/1500 has stable shelf life performance under recommended storage conditions. Due to its stable chemical nature and resistance to deterioration, it can be stored for a long time under standard sealed, moisture-proof, and light-protected storage conditions. For specific shelf life, please refer to the label on the product packaging or the product Safety Data Sheet (SDS), and rely on the ctory inspection report and batch information. Summary of Storage Conditions Storage ElementSpecific Requirement Packaging MethodMoisture-proof sealed packaging; reseal promptly after opening Ambient TemperatureCool environment, avoid extreme high temperatures and drastic temperature fluctuations Ambient HumidityDry environment, prevent moisture absorption Ventilation ConditionWell-ventilated warehouse Light RequirementAvoid direct sunlight Isolation RequirementKeep away from strong oxidizing agents Application Recommendations To ensure the product continues to meet usage requirements, it is recommended to establish a first-in-first-out inventory management system. For products stored long-term, a visual inspection can be performed before use—normal product should be a white waxy solid or flakes, without discoloration, odor, or caking. If the packaging is damaged, the product is severely caked due to moisture absorption, or the appearance is abnormal, quality re-inspection should be conducted before deciding whether to use it. Precautions Wear appropriate personal protective equipment during operation, including chemical safety goggles and protective gloves (such as nitrile or neoprene gloves) Avoid prolonged direct skin contact, which may cause mild skin irritation Avoid contact with eyes, which may cause eye irritation (GHS classification: H319) When using large quantities in enclosed or poorly ventilated areas, appropriate ventilation measures are recommended For detailed safety information, refer to the product Safety Data Sheet (SDS)

Question 7

What safety precautions should be taken when using PEG-1000/1500?

Accepted Answer

PEG-1000/1500 is a low-toxicity substance, but precautions must still be taken to prevent skin, eye, and respiratory tract irritation risks during handling, and personal protective measures should be strictly followed in accordance with GHS classification. Detailed Explanation PEG-1000/1500 (Polyethylene Glycol 1000/1500) is safe for human use under normal conditions, with extremely low acute oral toxicity, and is widely used in pharmaceuticals, cosmetics, and other fields with high safety requirements. However, during industrial operations and bulk handling, direct contact or inhalation of its dust/vapors may still cause local irritation reactions, so necessary safety precautions cannot be ignored. According to GHS classification (based on EU CLP regulations), this product is classified as a skin irritant (Category 2, H315), eye irritant (Category 2, H319), and specific target organ toxicant following single exposure (Category 3, H335, may cause respiratory irritation). Under the old EU regulatory system, it is labeled as an irritant (Xi) with risk phrases R36/37/38 (irritating to eyes, respiratory system, and skin), safety phrases S26 (in case of contact with eyes, rinse immediately with plenty of water and seek medical advice) and S36 (wear suitable protective clothing). During operations, choose well-ventilated areas or workplaces equipped with effective local exhaust ventilation to avoid generating and inhaling dust or vapors. Appropriate personal protective equipment must be worn, including chemical safety goggles and protective gloves (nitrile rubber or neoprene gloves recommended). Eating, drinking, and smoking are strictly prohibited in the workplace. Immediately after operation, remove contaminated work clothing and thoroughly wash exposed skin. Key Safety Operation Points Risk TypeGHS ClassificationPreventive Measures Skin ContactCategory 2 (H315: Causes skin irritation)Wear nitrile rubber or neoprene protective gloves; avoid prolonged direct skin contact Eye ContactCategory 2 (H319: Causes serious eye irritation)Wear chemical safety goggles; in case of eye contact, rinse immediately with plenty of water and seek medical advice (S26) Inhalation RiskCategory 3 (H335: May cause respiratory irritation)Maintain good ventilation or install local exhaust systems; avoid inhaling dust or vapors Storage Precautions PEG-1000/1500 should be stored in a cool, dry, and well-ventilated warehouse. Use moisture-proof sealed packaging, avoid direct sunlight, and keep away from strong oxidizing agents. Under recommended storage conditions, the product shelf life is stable. Key Reminders Although this product has low toxicity, do not ingest or use it for unintended purposes. During operation, strictly adhere to industrial hygiene practices and wear appropriate protective clothing (S36). For detailed safety information, please refer to the Safety Data Sheet (SDS). The product is a white waxy solid or flakes; take care to avoid burns when heating.

Question 8

How to use PEG-1000/1500? What is the recommended dosage?

Accepted Answer

The usage of PEG-1000/1500 varies depending on the application field. It is usually added directly as a formulation component, and the recommended dosage needs to be adjusted according to the specific process and formulation goals. Detailed Description PEG-1000/1500 belongs to the non-ionic polyethylene glycol series. It appears as a white waxy solid or flakes, with good water solubility and broad compatibility. Before use, it is usually necessary to choose an appropriate method to incorporate it into the formulation system based on the specific process. There are two common operation methods: one is the direct addition method, where solid flakes or granules of PEG-1000/1500 are directly added to the mixing system, melted or dissolved by heating and stirring; the other is the pre-melting method, where PEG is first heated to a molten state (PEG-1000 melting point is about 37-40°C, PEG-1500 melting point is about 44-48°C), and then added to the formulation in liquid form for uniform mixing. In various applications, the solubility of PEG-1000/1500 is closely related to temperature. It dissolves slowly in cold water, and it is recommended to heat it to 50-60°C under stirring conditions to accelerate dissolution. If the formulation system is water-based, PEG can be pre-dissolved in a small amount of warm water to form a stock solution, which is then added to the main system. For oil-based or solvent-based systems, PEG-1000/1500 has good compatibility with many organic solvents (such as ethanol, acetone, chloroform, etc.) and can be mixed directly. Application Recommendations The following are typical recommended dosages of PEG-1000/1500 in different industries (data sourced from Guo Li Chemical product application experience, actual dosage should be determined by formulation experiments): Application FieldSpecific UseRecommended Dosage (wt%)Usage Method Cosmetic creams/lotionsMoisturizer, lubricant1% - 5%Heat and dissolve together with the water phase, then emulsify cial/hair productsSoftening agent, solubilizer0.5% - 3%Directly add to the water phase and stir to dissolve Ointment baseWater-soluble base20% - 50%Combine with other PEGs, heat and melt together Suppository baseCarrier material30% - 90%Melt, mix with drug, and pour into molds Tablet binderWet granulation1% - 5% (based on dry powder weight)Prepare a solution and spray or add Rubber mold release/partingSurce coating5% - 15% (aqueous solution)Prepare a solution and spray or dip coat Textile sizing agentWarp sizing2% - 8% (of total sizing composition)Blend with other sizing components Paints/InksPlasticizer, dispersant1% - 5%Add during grinding or paint mixing stage Hot melt adhesiveViscosity modifier5% - 20%Melt and blend with other components Precautions Temperature Control: Processing temperature should not be too high; it is recommended to keep it below 80°C to avoid prolonged high-temperature heating which may cause oxidation or discoloration. PEG-1000/1500 has good thermal stability and will not decompose within reasonable processing temperatures, but excessively high temperatures may still affect product quality. Protective Requirements: Chemical safety goggles and protective gloves (such as nitrile rubber or neoprene gloves) should be worn during operation, and work should be conducted in a well-ventilated area. The product is classified as GHS Skin Irritation Category 2 (H315: Causes skin irritation) and Eye Irritation Category 2 (H319: Causes serious eye irritation). Avoid direct contact with skin and eyes. Moisture-proof Storage: PEG series products have certain hygroscopicity. After use, the packaging should be sealed immediately and stored in a cool, dry, well-ventilated warehouse, away from direct sunlight and strong oxidizing agents. Compatibility Testing: Before incorporating into a new formulation system, it is recommended to conduct small-scale compatibility tests to confirm no adverse reactions before large-scale use. Dosage Optimization: The above dosages are recommended reference ranges. The optimal dosage should be determined through experiments based on specific formulation goals (such as required viscosity, moisturizing effect, release performance, etc.). It is recommended to start from the middle value of the recommended range and gradually adjust to achieve the best effect.

Question 9

In which industries and processes are PEG-1000/1500 mainly used?

Accepted Answer

PEG-1000/1500 is widely used in six major industries: cosmetics and personal care, pharmaceuticals, industrial manucturing, textiles, rubber, and inks and coatings. It plays a key role in dozens of process steps such as lubrication, mold release, moisturizing, plasticization, and dispersion. Detailed Description PEG-1000/1500 is a nonionic polyethylene glycol series product produced by Haian Guoli Chemical Co., Ltd. It appears as a white waxy solid or flake with a defined molecular weight distribution range (PEG-1000 or PEG-1500 optional). With its excellent emulsifying and dispersing properties, outstanding wetting and solubilizing capabilities, superior chemical stability, and good biocompatibility, this product has become an indispensable functional additive in multiple industries. In cosmetics and pharmaceuticals, PEG-1000/1500 is widely used due to its low toxicity (extremely low acute oral toxicity) and good skin compatibility; in industrial manucturing, its acid-alkali resistance, hard water resistance, chemical stability, and thermal stability allow it to maintain stable performance across a wide pH range and processing temperature conditions, making it an ideal lubricant, mold release agent, and heat transfer medium. The following section details the specific application processes and functional roles of PEG-1000/1500 from six industry dimensions, providing references for formulation development and process optimization. Overview of Industry and Process Applications Industry Sector Application Process/Functional Role Functional Principle and Effect Cosmetics & Personal Care Moisturizer Forms hydrogen bonds with water molecules to lock in moisture, keeping skin and hair hydrated Lubricant / Softener Reduces friction coefficient between components, imparting a silky feel and soft touch Formula Stabilizer Used in creams, lotions, cleansers, and hair products to enhance stability and user experience Pharmaceutical Industry Ointment Base Water-soluble base component, easy to wash off, does not affect skin physiological function, good drug compatibility Suppository Base Melts rapidly at body temperature to release the drug, with water absorption and dispersion capabilities Binder (Wet Granulation) Provides good binding force, ensures uniform and compact granules for tableting Coating Material (Plasticizer/Pore Former) Adjusts flexibility, solubility, and permeability of film or sugar coatings Dropping Pill Base Acts as a carrier material, melts and then cools to form uniform spherical pills Industrial Manucturing Lubricant Reduces friction in metalworking and plastic molding, decreasing equipment wear and energy consumption Mold Release Agent Forms an isolation film in injection molding and die casting, ensuring smooth release and surce finish Hot Melt Adhesive Modifier Adjusts viscosity and open time, improving flowability and bond strength Heat Transfer Medium Used in constant temperature baths or heat exchange systems, wide temperature range, non-toxic and non-corrosive Textile Industry Sizing Agent Forms a flexible film on warp yarns during sizing, enhancing yarn strength and abrasion resistance, reducing breakage during weaving Antistatic Agent Imparts conductivity and hygroscopicity to fiber surces, rapidly dissipating static charges Rubber Industry Release Agent Coated on unvulcanized rubber or raw rubber sheets to prevent sticking, cilitating handling and storage Vulcanization Accelerator Carrier Acts as a dispersion medium for accelerators, ensuring uniform distribution in the rubber compound, improving vulcanization efficiency and product uniformity Inks and Coatings Plasticizer Increases flexibility and elasticity of resin systems, preventing cracking during bending or temperature changes Dispersant Promotes uniform dispersion of pigments and fillers, preventing flocculation and sedimentation, enhancing tinting strength and hiding power Flow Control Agent Adjusts rheological properties, improving leveling and wetting, reducing brush marks and surce defects Application Recommendations Cosmetic Formulations: It is recommended to add PEG-1000/1500 as a water-phase component, with dosage adjusted within 1%-10% based on the formula system. Its solubilizing ability can aid in dispersing poorly soluble active ingredients. Pharmaceutical Processes: The choice between PEG-1000 and PEG-1500 depends on the specific melting point requirements — higher molecular weight leads to higher melting point. Suppository bases often use a combination of PEG-1000 and PEG-1500 to adjust the melting point to near body temperature (approx. 37°C). Industrial Lubrication and Mold Release: Can be used alone or compounded with other additives, applied directly or sprayed onto mold surces after dissolving in a suitable solvent to form a uniform release film. Coatings and Inks: When used synergistically as plasticizer and dispersant, it is recommended to pre-disperse with a small amount of solvent before adding to the main formulation to ensure uniform distribution. Precautions PEG-1000/1500 is a low-toxicity substance, but GHS classification includes Skin Irritation Category 2 (H315) and Eye Irritation Category 2 (H319). It may cause skin and eye discomfort during handling. It is recommended to wear chemical safety goggles and protective gloves (e.g., nitrile rubber gloves). When used in large quantities in enclosed or poorly ventilated areas, appropriate ventilation measures should be taken to avoid inhalation of dust or vapor (may cause respiratory irritation, H335). Store in a cool, dry, well-ventilated warehouse, away from direct sunlight and strong oxidizing agents. Use moisture-proof sealed packaging to prevent moisture absorption and caking. No eating, drinking, or smoking is allowed in the operation area. Wash exposed skin thoroughly after operation.

Question 10

What are the physicochemical technical parameters of PEG-1000/1500?

Accepted Answer

PEG-1000/1500 is a non-ionic polyethylene glycol, appearing as a white waxy solid, with excellent solubility, chemical stability, and broad compatibility. Its core physicochemical parameters cover key indicators such as molecular weight, hydroxyl value, melting point, viscosity, and pH. Detailed Description PEG-1000/1500 (CAS No.: 25322-68-3) is a non-ionic polyethylene glycol series product provided by Guoli Chemical, with the molecular formula HO(C₂H₄O)nH, an n value of approximately 20 to 50, corresponding to a molecular weight range of 1000 to 1500. This product is a white waxy solid, easily soluble in water, with a pH value of 4.5 to 7.5 for a 1% aqueous solution, being weakly acidic to neutral. The active content (solid content) of the product is ≥99%, the moisture content is strictly controlled below 1.0%, and the free alcohol content does not exceed 0.5%, ensuring high purity and stability of the product. From a chemical perspective, the hydroxyl value range of PEG-1000/1500 is 75 to 112 mgKOH/g, acid value ≤0.5 mgKOH/g, saponification value ≤1 mgKOH/g, and iodine value ≤1 gI₂/100g, indicating that the molecular termini are mainly hydroxyl groups, with stable chemical properties, almost no saponifiable ester groups or unsaturated bonds, and resistance to acids, alkalis, and hard water. The HLB value is about 16, making it a highly hydrophilic non-ionic surctant with good emulsifying, dispersing, and solubilizing capabilities. In terms of physical properties, its melting point is 37 to 54°C, close to the human body temperature range, which gives it unique advantages in pharmaceutical applications such as suppository bases. At 100°C, the kinematic viscosity is 25 to 35 mm²/s (dynamic viscosity is 30 to 40), density is 1.08 to 1.10 g/cm³, refractive index is 1.458 to 1.460, flash point is above 240°C, making it a substance with low volatility and high thermal stability. The product is hygroscopic and must be stored sealed; under recommended storage conditions, its chemical properties remain stable. Technical Parameters Parameter ItemTechnical IndicatorRemarks CAS No.25322-68-3— Molecular FormulaHO(C₂H₄O)nHn≈20~50 Molecular Weight1000~1500Defined distribution range AppearanceWhite waxy solid— Ionic TypeNon-ionic— Active Content (Solid Content)≥99%— Moisture≤1.0%— pH Value (1% Aqueous Solution)4.5~7.525°C pH Value (5% Aqueous Solution)4.5~7.525°C Hydroxyl Value75~112 mgKOH/g— Acid Value≤0.5 mgKOH/g— Saponification Value≤1 mgKOH/g— Iodine Value≤1 gI₂/100g— HLB ValueApprox. 16Strong hydrophilicity Melting Point37~54°CClose to body temperature Density (25°C)1.08~1.10 g/cm³— Kinematic Viscosity (100°C)25~35 mm²/s— Dynamic Viscosity (100°C)30~40— Refractive Index1.458~1.460— Flash Point>240°C— HygroscopicityHygroscopicRequires sealed storage SolubilityEasily soluble in water— Foaming CharacteristicsLow foam— Chemical StabilityStableResistant to acids, alkalis, and hard water Heavy Metals≤10 ppm— Arsenic≤2 ppm— Packaging Specifications50kg plastic drum / 200kg plastic drum / IBC toteMoisture-proof sealed packaging Application Recommendations Based on the above physicochemical parameters, the application recommendations for PEG-1000/1500 are as follows: Its melting point range of 37 to 54°C makes it particularly suitable for use as a suppository base and drop pill base, capable of rapidly melting and releasing drugs at body temperature; the hydroxyl value of 75 to 112 mgKOH/g indicates sufficient active hydroxyl groups at the molecular termini, which can be used for further chemical modification or as a reaction intermediate; the HLB value of about 16 gives it excellent hydrophilicity, recommended as a humectant and lubricant in cosmetic formulations such as creams and lotions, with a recommended addition amount of 1% to 10%; the high flash point (>240°C) and good thermal stability make it suitable for industrial heat transfer media and high-temperature processing lubrication scenarios. Precautions The product is hygroscopic. After opening, it should be sealed immediately and stored in a cool, dry, well-ventilated warehouse, avoiding direct sunlight. During operation, chemical safety goggles and protective gloves should be worn to avoid contact with skin and eyes. The operation site should be well-ventilated. This product has low foam and is not suitable for formulation systems requiring high foaming performance. The above technical parameter data are sourced from the Guoli Chemical product database. For specific batch indicators, please refer to the ctory inspection report.

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Property	Value
CAS No.	25322-68-3
Molecular Formula	HO(C2H4O)nH, n≈20~50
Appearance	White waxy solid
Ionic Type	Nonionic
Avg. Molecular Weight	1000~1500
Active Content	≥99%
pH Value(1%)	4.5~7.5
pH Value(5%)	4.5~7.5
Iodine Value	≤1
Solubility	Readily soluble in water
Surface Tension	~63
Acid Value	≤0.5
Saponification Value	≤1
Hydroxyl Value	75~112
Moisture	≤1.0
Density	1.08~1.10
Kinematic Viscosity	25~35 (100°C)
Refractive Index	1.458~1.460
Flash Point	>240
Hygroscopicity	Hygroscopic
Chemical Stability	Stable
Foam Property	Low foam
Alkali Resistance	Stable
Unsaturation	≤1
Viscosity	30-40 mPa·s (100°C, dynamic)
Melting Point	37~54
Low Shear Viscosity	See kinematic viscosity
Solid Content	≥99
Free Alcohol	≤0.5
Heavy Metal	≤10
Arsenic	≤2