Polyethylene Glycol PEG-300 is a high-purity polyoxyethylene nonionic surfactant produced by Hai'an County Guoli Chemical Co., Ltd., with CAS number 25322-68-3 and molecular formula HO(C₂H₄O)nH (n≈6). It is prepared by polymerization of ethylene oxide and water (or ethylene glycol), with an average molecular weight between 285 and 315. The product has an effective content of ≥99%, is almost odorless transparent viscous liquid at room temperature, easily soluble in water, ethanol, acetone and other polar solvents, and has good hygroscopicity and chemical stability.
The core advantages of this product lie in its versatility: it possesses excellent emulsifying, wetting, dispersing, and solubilizing capabilities, significantly improving the uniformity of formulations; its excellent chemical stability allows it to withstand acids, alkalis, and hard water environments; its low volatility ensures long-lasting lubrication and moisturizing effects. Its HLB value is about 16.5, making it a relatively hydrophilic surfactant, with a cloud point above 100°C, low or no foam, and good alkali resistance at room temperature.
| Parameter Name | Specification Value |
|---|---|
| Appearance | Colorless to slightly yellow transparent viscous liquid |
| Ion Type | Nonionic |
| CAS No. | 25322-68-3 |
| Molecular Weight | 285～315 |
| Effective Content | ≥99% |
| HLB Value | 16.5 |
| Density (g/cm³) | 1.11～1.13 |
| Hydroxyl Value (mgKOH/g) | 356～394 |
| Kinematic Viscosity (mm²/s) | 60～75 |
| Low Shear Viscosity (mPa·s) | 60～80 |
| Flash Point (Closed Cup) | 195℃～234℃ |
| Solidification Point | -15℃～-8℃ |
| pH Value (1% Aqueous Solution) | 4.5～7.5 |
| Cloud Point | >100℃ |
| Moisture Content | ≤1.0% |
| Acid Value (mgKOH/g) | ≤0.2 |
| Iodine Value (g/100g) | ≤0.5 |
| Refractive Index | 1.466～1.468 |
| Heavy Metals | ≤10 mg/kg |
| Arsenic | ≤2 mg/kg |
| Solubility | Easily soluble in water, ethanol, acetone |
| Foaming Property | Low or no foam |
| Packaging Specifications | 50kg plastic drum / 200kg plastic drum / IBC tote tank |
PEG-300 is widely used in multiple industries due to its excellent performance. In the pharmaceutical field, it can be used as a water-soluble ointment base, suppository base, drop pill carrier, and injection solvent, with good biocompatibility; in the daily chemical industry, it is added as an efficient humectant and lubricant in skin care products, shampoos, and toothpaste to enhance product moisturizing sensation; in the industrial field, it is used for lubrication and antistatic treatment in papermaking and textile processing, and also as a solvent and plasticizer for coatings and inks. Additionally, in rubber products, it serves as a release agent and dispersion medium for vulcanization accelerators; in agriculture, it is used as a pesticide emulsifier and spreading agent to enhance the wetting and spreading ability of the liquid on plant surfaces.
Regarding recommended dosages (data sourced from Guoli Chemical product database and industry common practices): the common usage amount in pharmaceutical topical preparations is 5% to 30%; recommended addition amount in daily chemical moisturizing products is 1% to 10%; recommended dosage in industrial lubrication formulations is 3% to 15%; generally 2% to 8% when used as an emulsifier in pesticide formulations. The actual dosage should be determined experimentally based on the specific formulation and application scenario.