Polyethylene Glycol PEG-200 (CAS No.: 25322-68-3) is a nonionic surfactant produced by Guoli Chemical, appearing as a colorless transparent viscous liquid with a molecular weight of approximately 190-210. Due to its excellent solubilization, wetting, moisturizing, and chemical stability, it is widely used in daily chemicals, pharmaceuticals, industrial synthesis, textiles, metal processing, and other fields.
Detailed Description
Polyethylene Glycol PEG-200 is a low molecular weight polyether compound synthesized by polymerization of ethylene oxide, with the chemical structure HO(C₂H₄O)ₙH (n≈4) and molecular weight distribution between 190-210. This product is a typical nonionic surfactant with a very high HLB value (20), giving it outstanding hydrophilicity and solubilizing ability. As an excellent chemically inert auxiliary, PEG-200 is compatible with anionic, cationic, and other nonionic surfactants, and remains stable over a wide pH range, resistant to acids, alkalis, and hard water, and does not readily react with most chemicals.
In practical applications, the core advantages of PEG-200 are reflected in five aspects: First, excellent emulsifying and solubilizing ability, effectively reducing interfacial tension between different liquid phases and promoting stable dissolution and uniform mixing of poorly soluble substances; Second, outstanding wetting and dispersing functions, significantly improving the wetting state of solid particles in liquid media, preventing sedimentation and flocculation; Third, moderate hygroscopicity makes it an ideal moisturizer and lubricant; Fourth, superior chemical stability ensures reliable performance under harsh process conditions; Fifth, good toxicological safety—acute oral LD50 > 2000 mg/kg, classified as low toxicity, almost non-irritating to the skin, good biodegradability, and environmentally friendly.
The PEG-200 product provided by Guoli Chemical has an active content ≥99%, moisture ≤0.5%, acid value ≤0.5, with all key indicators strictly controlled. Packaging specifications include 50kg plastic drums, 200kg plastic drums, and IBC totes to meet the needs of different scale users.
Technical Parameters
| Parameter Name | Specification/Value |
|---|
| CAS No. | 25322-68-3 |
| Chemical Name | α-Hydro-ω-hydroxypoly(oxy-1,2-ethanediyl) |
| Molecular Formula | HO(C₂H₄O)ₙH, n≈4 |
| Molecular Weight | 190-210 |
| Appearance | Colorless transparent viscous liquid |
| Ionic Type | Nonionic |
| HLB Value | 20 |
| Active Content | ≥99% |
| Density (25°C) | 1.11~1.13 g/cm³ |
| Kinematic Viscosity (25°C) | 50~65 mm²/s |
| Low Shear Viscosity (25°C) | 60~80 mPa·s |
| Refractive Index | 1.466~1.468 |
| Flash Point | ≥155°C |
| Melting/Freezing Point | -65°C |
| Cloud Point | >100°C |
| Hydroxyl Value | 267-295 mg KOH/g |
| Acid Value | ≤0.5 mg KOH/g |
| Saponification Value | ≤1.0 mg KOH/g |
| Iodine Value | ≤0.1 gI₂/100g |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| pH Value (5% Aqueous Solution) | 4.5~7.5 |
| Moisture | ≤0.5% |
| Surface Tension | 44~45 mN/m |
| Heavy Metals | ≤10 mg/kg |
| Arsenic | ≤2 mg/kg |
| Solubility | Easily soluble in water, ethanol, acetone |
| Hygroscopicity | Hygroscopic |
| Foaming Property | Low foaming |
| Chemical Stability | Stable, resistant to acids, alkalis, and hard water |
Application Recommendations
Based on the performance characteristics of Guoli Chemical PEG-200, we recommend prioritizing this product in the following scenarios:
- Daily Chemical & Personal Care Industry: As a moisturizer, lubricant, and viscosity modifier, widely used in shampoos, body washes, creams, and toothpaste formulations, imparting a smooth feel to the skin. Recommended dosage should be adjusted within the range of 1%-15% based on formulation needs.
- Pharmaceutical & Agriculture: Serves as an ointment base, drug solubilizer, and pesticide emulsifier/dispersant, effectively enhancing the bioavailability and application efficacy of active ingredients. Its low toxicity ensures pharmaceutical safety.
- Industrial Casting & Metalworking: Used as a key component in mold release agents and as a heat transfer fluid, providing excellent high-temperature lubrication and demolding performance. Thanks to its high flash point (≥155°C) and low freezing point (-65°C), it has a wide range of applications.
- Chemical Synthesis: Acts as a solvent and synthetic intermediate, participating in esterification, etherification, and other chemical reactions for producing specialty surfactants and plasticizers. Its flexible ethoxy chain provides rich structural tuning possibilities for downstream synthesis.
- Textiles & Coatings: Functions as a softening agent in textile processing, and as a solubilizer and dispersant in inks, paints, and pigment pastes, improving the dispersion uniformity of pigment particles.
- Brake Fluids & Heat Transfer Fluids: Serves as a base component in brake fluid formulations, providing suitable low-temperature fluidity and thermal conductivity.
Precautions
- This product is hygroscopic; after use, the container should be sealed immediately and stored in a cool, dry place. Recommended storage temperature is 15°C to 30°C.
- Although it has high toxicological safety and is almost non-irritating to the skin, it is still recommended to wear safety goggles and protective gloves during operation to avoid prolonged direct contact.
- If accidentally splashed into eyes, rinse immediately with plenty of clean water for at least 15 minutes. Seek medical attention if irritation persists.
- Keep away from incompatible substances such as strong acids and strong oxidizers. Use stainless steel, polyethylene, or epoxy-lined containers for storage.
- Disposal should comply with local environmental regulations. Do not discharge into drains or water bodies.
- Packaging options include 50kg plastic drums, 200kg plastic drums, or IBC totes. Choose according to usage volume to minimize moisture absorption risk after opening.
