Polypropylene glycol

Polypropylene glycol (CAS 25322-69-4), commonly known as PPG, is a synthetic polyether diol produced by ring-opening polymerization of propylene oxide.

Where is Polypropylene glycol used?

• Polyurethane manufacturing: polyol building block for flexible foams and rigid insulation panels
• Elastomers and coatings: molecular weight selection determines hardness and flexibility
• Personal care: humectant and carrier in skin creams, hair conditioners and antiperspirants
• Industrial lubricants: base fluid and anti-foam agent in hydraulic fluids, gear oils and cutting fluids
• Home care: solvent and viscosity modifier in degreasers and detergents
• It functions as a humectant, solvent, plasticizer and lubricant base.

Good to know: Low skin irritation profile supports formulation compatibility. Industrial, cosmetic and USP grades are commercially available.

Commercial specifications

• Molecular weights typically 400 to 4000 Da
• Bulk supply in drums and IBC containers