Question 1

Is Span S-85 harmful to humans? Does it have an impact on the environment?

Accepted Answer

Under normal conditions of use, Span S-85 is essentially harmless to human health (not classified as a hazardous chemical under GHS), but it may cause mild irritation to the eyes and skin. For the environment, it has a water hazard class of WGK 1 (slightly hazardous) and must not be discharged directly into water bodies without treatment. Detailed Explanation Span S-85 (sorbitan trioleate) is a non-ionic surctant. According to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), this product is not classified as a hazardous chemical, with no hazard pictograms, signal words, or hazard statements (H-phrases). Under recommended usage conditions, operating according to regulations will not cause significant acute health hazards, making it generally safe. Regarding human health effects, prolonged or repeated skin contact may cause mild skin dryness, and it may cause mild eye irritation. Therefore, it is recommended to follow precautionary statement P280, i.e., wear protective gloves, protective eyewear, and ce protection. Operations should be conducted in well-ventilated areas, and hands and exposed skin should be thoroughly washed after handling. If eye contact occurs, rinse immediately with plenty of water for at least 15 minutes; if skin contact occurs, wash thoroughly with plenty of water and soap. In terms of ecological impact, Span S-85 has a water hazard class of WGK 1 (German water hazard classification), meaning it is slightly hazardous to water bodies. The product must not be discharged undiluted or untreated directly into water bodies or the environment. Waste disposal should be carried out in accordance with local, regional, and national environmental regulations. Empty containers may contain product residues and must be properly disposed of, not discarded arbitrarily. Safety Information Summary ItemContent GHS ClassificationNon-hazardous chemical Hazard PictogramsNone Signal WordNone Hazard StatementsNone Skin Contact EffectsMay cause mild skin dryness (prolonged/repeated contact) Eye Contact EffectsMild irritation Acute Health HazardsNo significant acute hazards under normal use Water Hazard ClassWGK 1 (slightly hazardous to water bodies) Suitable Extinguishing MediaCarbon dioxide, dry powder, foam extinguishing agents Application Recommendations Span S-85 is widely used in cosmetics, pharmaceutical preparations, food industry, textiles, metalworking, petroleum extraction, coatings and inks, and pesticide formulations. In all these applications, as long as recommended dosages and standard operating procedures are followed, the product is safe for humans. As a W/O emulsifier, its ultra-low HLB value and strong lipophilicity make it excellent in water-in-oil systems. Precautions Always wear chemical protective gloves and safety goggles during operation to avoid prolonged or repeated skin contact. Keep the workplace well ventilated; prohibit eating, drinking, or storing food. Thoroughly wash hands and exposed skin after use. Do not discharge the product untreated into sewers, water sources, or low-lying areas. Store in a cool, dry, well-ventilated warehouse with containers tightly closed, away from heat sources and open flames. Avoid contact with strong oxidizers. If leakage occurs, absorb with inert absorbent material (e.g., sand, vermiculite) and collect in a sealed container for disposal.

Question 2

What to do if problems occur during the use of Span S-85? How to obtain technical support?

Accepted Answer

If problems occur during the use of Span S-85, it is recommended to start solving them by simultaneously addressing three pathways: troubleshooting, safety emergency, and contacting Guoli Chemical technical support. Detailed Explanation Span S-85 (Sorbitan trioleate) is a highly lipophilic nonionic surctant. Common problems during use usually focus on poor emulsification, product stratification, poor solubility, or poor compatibility with other components in the system. When encountering problems, first systematically check the operation steps: Check whether the HLB value matching is reasonable (Span S-85 has an extremely low HLB value and needs to be compounded with high HLB value emulsifiers to cover the required oil phase range); whether the oil phase heating temperature is sufficient (recommended preheating to 60~70°C to reduce viscosity for easy dispersion); whether the homogenization emulsification process parameters (speed, time) are adequate; and whether the electrolytes or active ingredients in the formulation impact the emulsification system. If the product exhibits abnormal appearance (e.g., significantly deepened color, precipitation, stratification, etc.), first confirm whether storage conditions are compliant: Span S-85 should be stored in a cool, dry, well-ventilated warehouse, with the container tightly sealed, away from heat sources and strong oxidizers. Recommended storage temperature is controlled within room temperature range, avoiding extreme high or low temperatures. If the product has significantly deteriorated, stop using it and isolate it. Do not discharge it into water bodies or the environment arbitrarily (this product has a water hazard class WGK 1, slightly hazardous to water). If personal safety issues arise (e.g., skin contact causing irritation, splashing into eyes, etc.), immediately follow the emergency measures in the product safety instructions: For skin contact, rinse thoroughly with plenty of water and soap; for eye contact, rinse with plenty of water for at least 15 minutes and seek medical attention; if ingested, rinse mouth immediately, do not induce vomiting, and contact a poison control center. At the same time, operators should always wear chemical protective gloves and safety goggles, and work in a well-ventilated area. Channels to Obtain Technical Support Hai'an Guoli Chemical Co., Ltd. (Guoli Chemical) provides professional technical support services for this product. You can obtain help through the following methods: Contact the supplier directly: Contact the Guoli Chemical sales manager or customer service representative from whom you purchased Span S-85, providing the product batch number, purchase date, and a detailed description of the specific problem (including formulation information, process conditions, and photos of abnormal phenomena if possible) so that technical personnel can quickly locate the issue. Request technical data: Guoli Chemical can provide detailed Technical Data Sheets (TDS), Material Safety Data Sheets (MSDS/SDS), and formulation application guides to help you deeply understand the product characteristics and optimal usage conditions. Formulation evaluation service: If the formulation system is complex (e.g., W/O emulsions, metalworking fluids, oil-based drilling fluids, etc.), it is recommended to submit the entire formulation to the Guoli Chemical technical team for evaluation to identify compatibility between components or process matching issues. Sample retesting and compounding scheme optimization: If product batch quality abnormalities are suspected, you can apply for sample retesting; if emulsification effects need optimization, the technical team can assist in designing compounding schemes (e.g., the ratio of Span S-85 with high HLB value emulsifiers such as Tween series). Precautions Before contacting technical support, it is recommended to prepare the following information: product batch number, problem description, usage formulation (key commercial information can be omitted but functional components must be retained), process conditions (temperature, homogenization method, feeding sequence), and clear photos of abnormal phenomena. This product is not a hazardous chemical, but general industrial hygiene practices should still be followed during use. Wear protective gloves and goggles, and thoroughly wash hands and exposed skin after operation. If a return or exchange is required, follow the quality assurance policy and after-sales process of Guoli Chemical, subject to the terms agreed in the purchase contract.

Question 3

How to purchase Span S-85? What is the minimum order quantity?

Accepted Answer

To purchase Span S-85, please directly contact the sales team of Guoli Chemical. The minimum order quantity is not publicly available; it is recommended to negotiate with the sales team based on packaging specifications (50kg/200kg drums or IBC totes). Purchase Channels and Process Span S-85, as a professional industrial-grade nonionic surctant, is mainly targeted at corporate clients and is not sold through retail channels. For procurement, please directly contact the sales department of Haian Guoli Chemical Co., Ltd.. According to the company's quotation system, the listed price on the website is a reference price. The actual transaction price needs to be quoted in real time by the sales personnel based on ctors such as purchase quantity, payment method, and logistics requirements. Therefore, establishing direct contact is the most efficient way to purchase. It is recommended that you prepare the following information for a quick response from the sales staff: full company name, required purchase quantity (kg or tons), target application field (e.g., cosmetics, metalworking fluids, etc.), and detailed delivery address. Guoli Chemical offers a variety of standard packaging options, including 50kg plastic drums, 200kg plastic drums, and IBC totes (approximately 1000kg). Large-scale purchases usually enjoy more vorable tonnage prices. Packaging and Logistics Specifications Packaging TypeSpecificationApplicable Scenario Small-mouth plastic drum50kg/drumLaboratory R&D, small-scale trial production Large-mouth plastic drum200kg/drumRoutine batch production IBC toteApprox. 1000kg/toteLarge-capacity continuous production Precautions Span S-85 currently has no spot retail channels; all orders are shipped directly from the ctory. The specific delivery time needs to be confirmed with the sales staff. The product is classified as a non-hazardous chemical and complies with general chemical transportation regulations. However, it is recommended to confirm the freight and delivery cycle in advance when ordering. If there is a need for special packaging (such as food-grade or pharmaceutical-grade clean packaging), please specify it during the inquiry.

Question 4

Does Span S-85 meet environmental requirements? Can a test report be provided?

Accepted Answer

Span S-85 has a water hazard class of WGK 1 (slightly hazardous to water) and is not classified as a dangerous chemical under GHS. Under the premise of compliant use and proper disposal, it meets basic environmental requirements; a product COA (Certificate of Analysis) is routinely provided with each shipment, and customers can contact Guoli Chemical to obtain it. Detailed Explanation According to the ecological information in Guoli Chemical's product database, the water hazard class of Span S-85 is WGK 1 (German Water Hazard Classification standard, Class 1 means "slightly hazardous to water"), which is a relatively low environmental risk level among similar chemical products. The product manual clearly states: Do not discharge directly into water bodies or the environment without dilution or treatment; waste disposal must be carried out in accordance with local, regional, and national environmental regulations. This means that in industrial applications, as long as wastewater is properly treated and not directly discharged, the use of Span S-85 meets conventional environmental compliance requirements. From the GHS classification perspective, Span S-85 is not classified as a dangerous chemical, with no hazard pictograms, no signal word, and no hazard statements (H-phrases). Toxicologically, it only indicates "may cause mild skin dryness and slight eye irritation," and is not a high-risk substance for acute toxicity or ecotoxicity. Heavy metal content is strictly controlled (arsenic content ≤2 mg/kg, heavy metals ≤10 mg/kg), which also reflects the product's good performance in environmental compliance. Explanation of Test Reports Regarding test reports, there are no independent third-party environmental test reports (such as ROHS, REACH, SGS, etc.) available online in Guoli Chemical's product database. However, under normal circumstances, each batch of Span S-85 is shipped with a product COA (Certificate of Analysis), which includes key physical and chemical indicators such as acid value, saponification value, hydroxyl value, iodine value, moisture content, and heavy metal content. If specific environmental test reports are needed (such as biodegradability tests, VOC testing, declarations of compliance with specific regulations, etc.), it is recommended to directly contact Guoli Chemical's sales or technical department to obtain customized compliance documents based on specific application scenarios (e.g., REACH registration required for export to the EU, CPNP registration for cosmetic grade, etc.). Application Suggestions If your application scenario has strict environmental audit requirements (such as exporting to Europe or the US for cosmetics, food contact materials, green ctory certification, etc.), it is recommended to clarify the following needs with Guoli Chemical before purchasing: Whether REACH, ROHS, Halal, Kosher, or other special certification documents are required Whether biodegradability test reports (OECD 301 series) need to be provided Whether English versions of COA and MSDS for cosmetic-grade raw materials are required Precautions Although Span S-85 is a low environmental risk product, it is strictly prohibited to discharge it directly into sewers, rivers, or soil without treatment In case of leakage, use inert absorbent materials (sand, vermiculite) to collect and dispose of according to regulations to prevent entry into water bodies Empty drums may contain product residues and must not be discarded arbitrarily Environmental regulations vary by country/region; for export purposes, please confirm the compliance requirements of the target market in advance

Question 5

What are the advantages of Span S-85 compared to other similar products?

Accepted Answer

According to the technical data of Guoli Chemical, Span S-85, as sorbitan trioleate, has a core advantage in its **extremely strong lipophilicity**, which makes it a key and hard-to-replace component for preparing highly stable water-in-oil (W/O) emulsions and microemulsion systems. Compared with other similar sorbitan esters (Span series) products, such as Span S-80 (monoester), Span S-85 (triester) has significant differences in structure and performance. Specific advantages and comparative analysis are as follows: ### 1. Lower HLB Value, Stronger Lipophilicity Span S-85 has an extremely low HLB value among similar products (approximately 1.8), much lower than Span S-80 (approximately 4.3) and S-60 (approximately 4.7). This makes it an ideal choice for preparing W/O emulsions, especially those requiring extremely high stability or used in high oil phase content formulations. ### 2. Superior Emulsion Stabilization Performance Due to the introduction of three oleic acid long chains in its molecular structure, the steric hindrance effect is stronger, forming a more robust intercial film at the oil-water interce. Therefore, W/O emulsions prepared with Span S-85 often exhibit better long-term stability, anti-coalescence ability, and heat resistance compared to formulations using Span S-80. ### 3. Performance Advantages Comparison | Comparison Dimension | **Span S-85 (This Product)** | Span S-80 (Similar Product/Monooleate) | | :--- | :--- | :--- | | **Molecular Structure** | Sorbitan **trioleate** | Sorbitan **monooleate** | | **HLB Value** | Extremely low (~1.8) | Relatively low (~4.3) | | **Lipophilicity** | **Extremely strong** | Strong | | **Main Applicable Systems** | High oil content W/O emulsions, microemulsions, **high temperature/high salinity/extreme conditions** | Conventional W/O emulsions, solvent-based additives | | **Emulsification Efficiency** | Higher affinity for polar oils, waxes, and hydrocarbons; dosage may be lower | Conventional oil emulsification | | **Application Scenarios** | High-end creams, oil-based drilling fluids, rust preventive oils, high-concentration emulsifiable concentrates | Textile oils, pesticide emulsification, common creams | | **Synergistic Effect** | When compounded with low-HLB oil-soluble co-emulsifiers, it significantly enhances the stability of systems with high electrolyte content or strong acid/alkali conditions | - | ### 4. Unique Application Advantages - **Extreme System Stability**: In oil-based drilling fluids and fracturing fluids for petroleum extraction, Span S-85 can better cope with **high temperature and high salinity** formation environments, maintaining emulsion stability, which many conventional emulsifiers cannot achieve. - **Pigment and Solid Dispersion**: In coatings, inks, and color cosmetics, Span S-85 has stronger wetting and dispersing capabilities for pigments and fillers, effectively preventing floating and flooding, improving tinting strength and coating smoothness. - **Skin Feel and Conditioning**: In cosmetics, the triester structure is closer to triglycerides in human sebum, imparting a more moisturizing and dense application feel to creams, forming a more breathable protective film. The skin feel is generally superior to monoester products. ### Application Suggestions and Precautions - **Compounding Use**: It is recommended to use Span S-85 as the primary emulsifier or co-emulsifier for constructing W/O systems. It is typically used in combination with low-HLB water-in-oil emulsifiers or oil-soluble dispersants for optimal results. - **Formulation Compatibility**: Excellent compatibility with various mineral oils, vegetable oils, silicone oils, esters, and hydrocarbon solvents. **Precautions**: Although it is not a hazardous material, during handling and storage, it is still recommended to operate in a well-ventilated area, wear protective gloves and goggles, and avoid prolonged direct skin contact. Store in a cool, dry place with the container tightly sealed.

Question 6

How to store Span S-85? What is its shelf life?

Accepted Answer

Span S-85 should be stored sealed in a cool, dry, and well-ventilated place. Under recommended conditions, its shelf life is typically 2 years. Detailed Description Span S-85 (sorbitan trioleate) is a chemically stable nonionic surctant that is not prone to deterioration under normal temperature storage. Its molecular structure contains unsaturated tty acid ester chains (iodine value 75–85). Prolonged exposure to high temperature, humidity, or strong oxidizing environments may cause oxidative rancidity, affecting the product's color and emulsifying performance. Therefore, strict control of storage conditions is key to ensuring product quality and extending its service life. Under cool, dry, sealed, and room-temperature conditions, unopened Span S-85 can typically be stored stably for 24 months. After opening, it should be used as soon as possible, and the container should be immediately sealed after each use to avoid prolonged contact with moisture and oxygen in the air. If the product shows significant color darkening, rancid odor, or delamination/cloudiness, it may have deteriorated and should not be used. Technical Parameters ParameterValue AppearanceAmber to brownish yellow viscous oily liquid Chemical StabilityStable at room temperature; avoid strong acids and bases Flash Point (Open Cup)>200°C Density (25°C)0.95-1.00 g/cm³ Moisture≤1.5% Recommended Storage TemperatureRoom temperature range; avoid extreme high or low temperatures Packaging Specifications50kg plastic drum, 200kg plastic drum, IBC tote Application Suggestions Span S-85 has an HLB value of 1.8 and is a highly lipophilic water-in-oil (W/O) emulsifier. It is widely used in cosmetics, pharmaceutical ointments, metalworking fluids, and pesticide emulsifiable concentrates. It is recommended that users gently stir the product before use (increased viscosity at low temperatures is normal) and pre-dissolve/disperse it in the oil phase according to formulation requirements to fully utilize its emulsifying and dispersing effects. Precautions Keep container tightly closed; keep away from heat, sparks, and open flames. Avoid contact with strong oxidizing agents to prevent oxidative deterioration. Storage area should be away from food, beverages, and animal feed. Low temperatures may cause an increase in viscosity or cloudiness, which is a physical change. After returning to room temperature and stirring, the product can be used normally. This product has a water hazard class of WGK 1; do not discharge directly into water bodies or the environment without treatment.

Question 7

What safety precautions should be taken when using Span S-85?

Accepted Answer

Span S-85 is not a dangerous chemical, but it should still be handled according to general industrial chemical practices, with emphasis on personal protection, avoiding prolonged skin contact, and preventing eye irritation. Detailed Description Span S-85 (Sorbitan trioleate) is not classified as a hazardous chemical according to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). It has no hazard pictograms, signal words, or hazard statements (H-phrases). This means that under normal conditions of use, the product does not pose significant acute health hazards. However, prolonged or repeated contact may still cause mild skin dryness and slight eye irritation, so basic safety awareness is still required during handling. This product is an amber to brownish-yellow viscous oily liquid with strong lipophilic properties. Due to its high viscosity, spill cleanup can be inconvenient, so care should be taken to avoid tipping containers. Additionally, as a nonionic surctant, Span S-85 is chemically stable and resistant to acids, alkalis, and hard water, but it should still be kept away from strong oxidizing agents during storage and use to ensure product quality and safety. Personal Protective Equipment Requirements According to GHS precautionary statement P280, the following protective measures should be implemented when handling Span S-85: Body PartRequired Protective Equipment HandsWear chemical-resistant gloves to prevent repeated or prolonged skin contact EyesWear safety goggles to prevent splashes ce/RespiratoryOperate in a well-ventilated area; wear ce protection if necessary Emergency Response Measures Accident TypeResponse Steps Skin ContactImmediately remove contaminated clothing and footwear; rinse thoroughly with plenty of water and soap; seek medical attention if irritation persists. Eye ContactImmediately flush with plenty of water for at least 15 minutes, holding eyelids apart; remove contact lenses if present before continuing; seek medical help if irritation persists. InhalationMove the person to fresh air and keep airway clear; seek medical attention immediately if respiratory discomfort occurs. IngestionRinse mouth with water immediately; do NOT induce vomiting; contact a poison control center or seek medical attention immediately. Spill HandlingSmall spills: Absorb with inert absorbent materials such as sand, vermiculite, etc., and collect in a sealed container; large spills: Contain by diking to prevent entry into drains or water sources. FirefightingSuitable extinguishing media: Carbon dioxide, dry powder, foam; firefighters should wear self-contained breathing apparatus and full protective equipment. Storage Precautions Store in a cool, dry, well-ventilated warehouse; recommended storage at room temperature range Keep container tightly closed; keep away from heat sources, sparks, and open flames Avoid contact with strong oxidizing agents Store in original containers or compatible materials; ensure labels are clear and intact Store away from food, beverages, and animal feed Handling Precautions Operators should receive relevant safety training and be miliar with product characteristics and operating procedures Thoroughly wash hands and exposed skin after handling No eating, drinking, or smoking in work areas; do not store food in work areas Observe general industrial hygiene practices and maintain good work habits Environmental and Waste Disposal Water hazard class: WGK 1 (slightly hazardous to water); do not discharge undiluted or untreated into water bodies or the environment Disposal of waste must comply with local, regional, and national environmental regulations Empty containers may contain product residues; dispose of properly and do not discard indiscriminately Prevent spills from entering drains, water sources, or low-lying areas Note: The above safety information is compiled based on available data. Users should assess and take appropriate control measures according to actual application scenarios. For more detailed information, please contact Guoli Chemical Technical Support.

Question 8

How to use Span S-85? What is the recommended dosage?

Accepted Answer

The use of Span S-85 needs to be flexibly adjusted according to the specific application system. It is usually used as a water-in-oil (W/O) emulsifier by heating and dissolving in the oil phase. The common recommended dosage is 1%~5% of the total formula (specific dosage needs to be optimized through experiments). Detailed Description Span S-85 (Sorbitan Trioleate) is an ultra-lipophilic non-ionic surctant with an HLB value of only 1.8. It is an amber to brownish-yellow viscous oily liquid at room temperature. Due to its strong lipophilic characteristics, it is mainly used to prepare water-in-oil (W/O) emulsion systems. When in use, it is recommended to add Span S-85 to the oil phase, heat to 40~60°C with stirring until completely dissolved and dispersed, and then mix with the water phase for emulsification. For high-viscosity formulations, the heating temperature can be appropriately increased, but avoid exceeding 150°C to prevent decomposition. In actual operation, it is recommended to use a homogenization emulsification process: first heat the oil phase (containing Span S-85) and the water phase to the same temperature (usually 70~80°C), then slowly add the water phase to the oil phase under stirring, homogenize at high speed (3000~5000 rpm, 3~5 minutes), and then cool to obtain a stable W/O emulsion. If the formulation uses a combination of Span series and Tween series, a wider HLB value adjustment range and better emulsification stability can be obtained. Regarding the recommended dosage, the Guoli Chemical product database does not provide fixed recommended dosages for various application fields. According to common industry practices, the typical usage in cosmetic creams is 1%~3%, in metalworking emulsified oils is 3%~8%, in pesticide emulsifiable concentrates is 2%~6%, and in coating dispersion is 0.5%~2% of the total formula. However, the optimal dosage is affected by multiple ctors such as the type of oil phase, water phase ratio, system viscosity, and storage conditions. It is recommended to determine the specific dosage through gradient experiments. Technical Parameters ItemParameter Product NameSpan S-85 (Sorbitan Trioleate) CAS Number26266-58-0 Ionic TypeNon-ionic Surctant HLB Value1.8 AppearanceAmber to Brownish-yellow Viscous Oily Liquid Active Content≥98% SolubilityEasily soluble in oil, dispersible in water Density (25°C)0.95-1.00 g/cm³ Flash Point (Open Cup)>200°C Acid Value≤15 mgKOH/g Saponification Value165~185 mgKOH/g Hydroxyl Value50~80 mgKOH/g Moisture Content≤1.5% Application Suggestions Cosmetic Creams/Emulsions: As a primary or auxiliary emulsifier, first dissolve Span S-85 in the oil phase (mineral oil, silicone oil, esters, etc.), heat to 70~75°C, and mix with the water phase at the same temperature using homogenization. To ensure a refreshing skin feel, it is recommended to use it in combination with a small amount of hydrophilic emulsifier. Metalworking Cutting Fluids: When preparing emulsified cutting fluids, add Span S-85 to the base oil and heat to dissolve, then mix with the water phase containing rust inhibitors and extreme pressure additives to form a stable water-in-oil emulsification system, providing both lubrication and cooling functions. Pesticide Emulsifiable Concentrates (EC): As an emulsifier component, used in combination with anionic emulsifiers (such as Nongru 500#), it helps improve the compatibility of the active ingredient in organic solvents and ensures rapid self-emulsification when the formulation is added to water. Coating/Ink Dispersion: Add during the grinding stage to wet the pigment surce and shorten dispersion time. The recommended dosage is 2%~5% of the pigment weight. Textile Oils: Directly add to synthetic fiber finishing oil formulations to reduce fiber friction coefficient, impart smoothness and bundling properties, and reduce breakage during spinning. Precautions Operational Protection: According to GHS classification, this product is non-hazardous, but it is still recommended to wear chemical protective gloves and safety goggles and use in a well-ventilated area during operation. Prolonged or repeated skin contact may cause mild dryness. Storage Conditions: Store in a cool, dry, and ventilated place, keep the container tightly sealed, and keep away from strong oxidizing agents. The recommended storage temperature is room temperature, avoiding extreme high or low temperatures. The melting point of this product is below 0°C. At low temperatures, the viscosity may increase, but it can resume fluidity after warming. Dosage Optimization: The recommended dosage is for reference only. The final usage should be determined through experiments based on the specific formulation system and performance requirements, using emulsion centrifugal stability (3000 rpm × 30 min without separation) or high-temperature stability (50°C × 30 days) as evaluation indicators. Environmental Note: Water hazard class WGK 1, slightly hazardous to water bodies. Do not discharge directly into water bodies without treatment. Waste disposal must comply with local environmental regulations. Compatibility: Compatible with various oils, waxes, and most active ingredients, but sensitive to strong alkaline conditions and not resistant to strong alkaline environments.

Question 9

In which industries and processes is Span S-85 mainly used?

Accepted Answer

Span S-85 is a highly lipophilic nonionic surctant widely used in eight major industries, including cosmetics, pharmaceuticals, food, textiles, metalworking, petroleum extraction, coatings and inks, and pesticide formulations. Its core functions are as a water-in-oil (W/O) emulsifier, wetting dispersant, and solubilizer. Detailed Description Span S-85 (sorbitan trioleate, CAS No.: 26266-58-0) appears as an amber to brownish-yellow viscous oily liquid with an extremely low HLB value (hydrophilic-lipophilic balance), exhibiting strong lipophilic characteristics. This essential property makes it a key component for preparing stable water-in-oil (W/O) emulsions and microemulsions, significantly reducing oil-water intercial tension and imparting a fine texture and long-term storage stability to various emulsion systems. This product has excellent chemical inertness and compatibility, capable of withstanding acidic, alkaline, and hard water environments while maintaining stable activity under a wide range of process conditions. It exhibits good compatibility with various oils, waxes, and active ingredients. Additionally, Span S-85 is not classified as a hazardous chemical and can be used according to general chemical handling procedures, making it easy to operate and widely applicable. In practical processes, Span S-85 can be used either as a single primary emulsifier or in combination with high-HLB emulsifiers (such as Tween series) to flexibly adjust the hydrophilic-lipophilic balance of the system, meeting the emulsification requirements of different formulations. Its efficient dispersing ability also effectively prevents pigment flocculation, floating color, and other issues, playing a key role in various industrial scenarios. Industry Applications and Process Details Industry FieldSpecific ApplicationProcess Role Cosmetics & SkincareCold cream, massage cream, sunscreen, foundation, mascara, eye shadowActs as W/O emulsifier to impart fine texture to creams; disperses and suspends UV filters to enhance water resistance; improves pigment wetting and adhesion durability Pharmaceutical PreparationsTopical ointments, cream bases, suppository basesServes as a mild W/O emulsifier to promote uniform drug distribution and skin absorption; adjusts suppository melting characteristics and hardness to improve drug release uniformity Food IndustryWhipped cream, frosting, shortening, confectionery mold release oil, defoamerImproves aeration and structural stability; functions as an emulsifier in mold release oil and as a component of defoamers Textile IndustrySynthetic fiber tow finishing oil, antistatic finishing agentReduces friction between fibers and metal, imparting smoothness and cohesion, reducing breakage rate; provides lasting antistatic effect MetalworkingEmulsifiable cutting fluids, rust preventive oilsPrepares stable W/O or semi-synthetic cutting fluids, balancing lubrication and cooling; assists film formation and solubilization of antirust additives, improving coating uniformity Petroleum ExtractionOil-based/synthetic-based drilling fluids, fracturing fluidsStabilizes inverse emulsions, enhances wellbore stability and cuttings carrying capacity; improves oil-water mixing uniformity, aids friction reduction and flowback efficiency, tolerates high temperature and high salinity reservoir conditions Coatings & InksPigment wetting and dispersion, flow leveling and adhesion promotionWets pigment surces, shortens dispersion time, prevents flocculation and floating color/ flooding; modifies coating surce tension, reduces brush marks or orange peel Pesticide FormulationsEmulsifiable concentrates (EC), suspension concentrates (SC)Improves compatibility of active ingredients with organic solvents, ensuring rapid spontaneous emulsification upon water addition; aids wetting and dispersion of solid active ingredient particles, preventing sedimentation and agglomeration Application Recommendations Combination Use: Span S-85 is often used in combination with high-HLB emulsifiers (such as Tween series). By adjusting the ratio, the target HLB value can be achieved to meet emulsification requirements for different oil and water phase ratios. It is recommended to determine the optimal ratio through HLB value calculation. Recommended Dosage: When used as the primary emulsifier, the typical addition amount is 1%-5% of the total formulation (exact dosage varies depending on the system); when used as a dispersing aid, the addition amount is usually 0.5%-3% of the weight of pigments or solid particles. It is recommended to determine the optimal dosage through small-scale experiments. Addition Process: Generally, dissolve Span S-85 in the oil phase first, heat to 40-60°C to ensure thorough dissolution and mixing, then perform emulsification with the water phase. For systems containing solid pigments, it can be pre-ground with the pigments to achieve pre-wetting before subsequent preparation. Precautions Safety Protection: Wear chemical protective gloves and safety goggles during operation. Work in a well-ventilated area. Thoroughly wash hands and exposed skin after operation. Storage Conditions: Store in a cool, dry, well-ventilated warehouse. Keep containers tightly closed and away from heat sources and strong oxidizers. It is recommended to store within the room temperature range. Environmental Note: Water hazard class WGK 1, slightly hazardous to water. Do not discharge undiluted or untreated directly into water bodies or the environment. Compatibility Testing: Before use in specific formulations, it is recommended to conduct small-scale compatibility tests to confirm stability with other components in the system (especially active ingredients, electrolytes, etc.).

Question 10

What are the physicochemical technical parameters of Span S-85?

Accepted Answer

Span S-85 (Sorbitan Trioleate) is an ultra-low HLB (1.8) oil-soluble nonionic surctant, appearing as an amber to brownish-yellow viscous liquid at room temperature, specifically used for emulsification and dispersion in water-in-oil (W/O) systems. Detailed Description Span S-85, chemically named sorbitan trioleate, has the molecular formula C₆₀H₁₀₈O₈, a molecular weight of approximately 957 g/mol, and CAS number 26266-58-0. This product is synthesized by esterifying sorbitan with three molecules of oleic acid. The three long-chain unsaturated tty hydrocarbon groups in its structure impart extremely strong lipophilic properties, making it one of the lowest HLB value varieties in the Span series (only 1.8). It is almost insoluble in water but readily soluble in most organic solvents and oils. The product is liquid at room temperature (melting point below 0°C), with good low-temperature fluidity and chemical stability. Its iodine value ranges from 75 to 85 gI₂/100g, reflecting the presence of certain unsaturated double bonds in the molecular chain. Prolonged high-temperature heating or contact with strong oxidizing agents should be avoided to prevent oxidative degradation. The product is not classified as a hazardous chemical; under GHS classification, it has no hazard pictograms or hazard statements. However, it is still recommended to wear protective gloves and safety goggles during handling. Technical Parameters Physicochemical Technical Parameters List Parameter ItemSpecification/Value Chemical NameSorbitan Trioleate (Sorbitan Trioleate) CAS Number26266-58-0 Molecular FormulaC₆₀H₁₀₈O₈ Molecular Weight~957 g/mol Appearance (25°C)Amber to brownish-yellow viscous oily liquid Ionic TypeNonionic Surctant HLB Value1.8 Active Content≥98% Moisture≤1.5% pH Value (1% Aqueous Dispersion)5.0 ~ 7.0 pH Value (5% Aqueous Dispersion)5.0 ~ 7.0 Acid Value≤15 mgKOH/g Saponification Value165 ~ 185 mgKOH/g Hydroxyl Value50 ~ 80 mgKOH/g Iodine Value75 ~ 85 gI₂/100g Density (25°C)0.95 ~ 1.00 g/cm³ Kinematic Viscosity (25°C)200 ~ 500 mm²/s Low Shear Viscosity (25°C)200 ~ 400 mPa·s Refractive Index (20°C)1.470 ~ 1.480 Melting Point Flash Point (Open Cup)>200°C SolubilityReadily soluble in oils and organic solvents, dispersible in water Cloud PointNot applicable (Oil-soluble product, insoluble in water) Foaming PropertyLow foaming HygroscopicityLow Chemical StabilityStable at room temperature; avoid strong acids and alkalis Alkali ResistanceNot resistant to strong alkalis Monoester Content≤2% Diester Content≤2% Free Alcohol≤2% Heavy Metals (as Pb)≤10 mg/kg Arsenic (As)≤2 mg/kg Water Hazard ClassWGK 1 (Slightly hazardous to water) Packaging Specifications50kg Plastic Drum / 200kg Plastic Drum / IBC Tote Application Suggestions With its extremely low HLB value (1.8) and strong lipophilicity, Span S-85 is most suitable as an emulsifier for water-in-oil (W/O) systems. In the cosmetics field, it is recommended for formulations of cold creams, massage creams, sunscreens, and liquid foundations, with a suggested dosage of 1% to 5% of the oil phase total. It can be compounded with high HLB Tweens (e.g., Tween-80) to adjust the overall HLB value of the emulsion system. In metalworking fluids, as a key component of emulsifying cutting fluids and rust-preventive oils, it forms stable water-in-oil emulsion structures, providing excellent lubrication and corrosion protection. In pesticide emulsifiable concentrate (EC) formulations, it significantly enhances the compatibility of the active ingredient with organic solvents, promoting rapid spontaneous emulsification upon addition to water. Note that this product is not resistant to strong alkaline environments; compatibility tests should be conducted when used in alkaline formulations. Due to its high iodine value (75~85), the molecular chain contains unsaturated double bonds. Prolonged exposure to air or high temperatures may cause slow oxidation. It is recommended to store sealed in a cool, dry place and use promptly after opening. Precautions This product is a non-hazardous chemical. Under GHS classification, there are no hazard pictograms or hazard statements, but it is still recommended to wear chemical protective gloves and safety goggles during handling. Store in a cool, dry, well-ventilated warehouse; keep containers tightly closed, away from heat sources and strong oxidizing agents; recommended storage temperature is room temperature range. The product is slightly hazardous to water (WGK 1). Do not discharge untreated directly into water bodies or the environment. Waste should be disposed of in accordance with local regulations. Prolonged or repeated skin contact may cause mild dryness; wash hands thoroughly after handling.

Span S-85 (Sorbitan Trioleate)

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Packaging and Storage

Span / Sorbitan Ester Applications

Product Properties

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GHS

Handling

Storage

First Aid

Related Products

Property	Value
CAS No.	26266-58-0
Molecular Formula	C60H108O8
Appearance	Yellow to amber
Ionic Type	Nonionic
Avg. Molecular Weight	~957
Cloud Point	N/A (oil-soluble; insoluble in water)
Active Content	≥98%
pH Value(1%)	5.0-7.0
pH Value(5%)	5.0-7.0
Iodine Value	75~85
Solubility	Readily soluble in oils; dispersible in water
Surface Tension	N/A (insoluble in water; no typical aq. soln. surface tension)
CMC	N/A (insoluble in water)
Acid Value	≤15
Saponification Value	165~185
Hydroxyl Value	50~80
Moisture	≤1.5
Density	0.95-1.00 g/cm³ (25°C)
Kinematic Viscosity	200-500 mm²/s (25°C)
Refractive Index	1.470-1.480 (20°C)
Flash Point	>200°C (open cup)
Hygroscopicity	Low
Chemical Stability	Stable at room temperature; avoid prolonged exposure to strong acids/alkalis and high temp
Amine Value	N/A (non-amine surfactant)
Penetration	N/A (not a penetration test indicator)
Foam Property	Low foam
Alkali Resistance	Not resistant to strong alkali
Unsaturation	Iodine Value 75-85 reflects unsaturation degree
Viscosity	200-500 mm²/s (25°C)
Melting Point	<0°C (liquid)
Monoester Content	≤2%
Diester Content	≤2%
Low Shear Viscosity	200-400 mPa·s (25°C)
Solid Content	≥98%
Free Alcohol	≤2%
Heavy Metal	≤10 mg/kg
Arsenic	≤2 mg/kg

Span S-85 (Sorbitan Trioleate)

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Packaging and Storage

Span / Sorbitan Ester Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

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