Basic Information of Polyethylene Glycol 600 (PEG 600)
Chemical Name: Polyethylene Glycol 600
English: Polyethylene Glycol 600
CAS Number: 25322-68-3 (shared across the PEG series, distinguished by average molecular weight)
Structural Formula: (boldsymbol{HO(CH_2CH_2O)_nH})
Average Molecular Weight: 570–630
Functional Groups: Hydroxyl groups at both ends; non-ionic polyether

Physical and Chemical Properties of Polyethylene Glycol 600 (PEG 600)
Appearance: Colorless, transparent, viscous liquid at 25℃; becomes cloudy and solidifies at low temperatures, returns to clear when heated
Color: ≤20 (Pt-Co)
Density: 1.12–1.13 g/cm³ (20℃)
Viscosity: 56–62 mPa·s (40℃)
Freezing Point: about 17–22℃
Solubility: Miscible with water in any ratio; soluble in ethanol, acetone, dichloromethane; insoluble in mineral oil and hydrocarbon oils
Hygroscopicity: Strong, better than solid PEGs like PEG1000, PEG4000
Stability: Stable at room temperature, not easily hydrolyzed; oxidatively decomposes into aldehydes at high temperatures (>200℃)
pH (5% aqueous solution): 4.0–7.5

Main Applications of Polyethylene Glycol 600 (PEG 600)
Pharmaceuticals (Pharmaceutical Grade PEG600)
Solubilizer for oral liquids and topical ointments, moisturizing base for ointments; plasticizer for soft capsules; solubilizing excipient for injections.
Cosmetics and Personal Care
Moisturizer, solubilizer, emollient; used in serums, creams, and hair & skincare products to improve the solubility of water-soluble fragrances and active ingredients.
Industrial Uses
Intermediate in organic synthesis for making PEG esters and non-ionic surfactants;
Metalworking lubricant and cooling aid;
Ink and dye dispersant;

Polyurethane and resin modification additive.

Textile Industry: Softener and spinning lubricant.

Specification

Application