Polyethylene Glycol 4000, commonly referred to as PEG 4000, is a high-molecular-weight polymer of ethylene oxide and water. It is part of a diverse group of polyether compounds known for their excellent solubility and stability. PEG 4000 is a wax-like solid that serves a variety of industrial applications due to its unique properties such as low toxicity and high compatibility with many organic compounds.
 
Product Description
Type: Polyethylene Glycol (PEG), Industrial Grade
Molecular Weight: 3600-4400 g/mol
Form: Wax-like solid
Solubility: Soluble in water, methanol, benzene, and dichloromethane; insoluble in diethyl ether and hexane
Hygroscopic Properties: Controllable based on the degree of polymerization
 
Technical Specifications
Appearance and Completeness of Solution: Slightly hazy solution when 5g is dissolved in 50ml of water (USP42-NF37)
Viscosity at 98.9°C: 110-158 cSt (USP42-NF37)
pH of 5% Solution: 4.5-7.5 (USP42-NF37)
Hydroxyl Value: 26.5-29.5 mg KOH/g (ASTM D4252)
Assay (Average Molecular Weight): 3600-4400 g/mol (USP42-NF37)
Water Content: Max 2% (ASTM E203)
 
Applications
Pharmaceuticals: Used as a base for ointments and suppositories due to its lubricating properties and low toxicity.
Personal Care Products: Commonly used in creams, lotions, and toothpaste for its moisture-retaining properties and compatibility with various ingredients.
Industrial Applications: Acts as a lubricant and surface finisher in various manufacturing processes. Also used in printing inks due to its solvent properties.
Food Industry: Serves as an additive in food products where it functions as a moisture preserver and consistency enhancer.
 
Summary
Polyethylene Glycol 4000 (PEG 4000) is an invaluable component in various industrial sectors, praised for its versatility, low toxicity, and excellent solubility profile. Whether it's in pharmaceutical formulations, personal care products, or specialized industrial applications, PEG 4000 enhances product efficacy and safety, making it a staple ingredient across multiple industries.