Propylene glycol (PG, CAS 57-55-6) is a versatile, low-toxicity liquid used across pharmaceuticals, food, cosmetics and industry. This guide covers its uses, grades and why it is so widely chosen.
What is propylene glycol?
Propylene glycol is a clear, colourless, nearly odourless liquid that is miscible with water. It acts as a solvent, humectant (moisture-retainer) and freezing-point depressant, and is recognised as safe for many food and pharmaceutical uses.
Common uses
- Pharmaceutical & food — a USP/EP-grade solvent, carrier and humectant.
- Cosmetics — moisturisers and personal-care formulations.
- Industrial — antifreeze and heat-transfer fluids (a lower-toxicity alternative to ethylene glycol) and de-icing.
- Solvent — for flavours, fragrances and as a process solvent.
Grades
Propylene glycol is available in USP/EP (pharmaceutical/food) and industrial/technical grades. Food and pharma applications require the USP/EP grade; request a COA to confirm.
Safe handling
Propylene glycol has low toxicity but should still be handled per its SDS — store cool and sealed, away from strong oxidisers.
Buy propylene glycol from Ozon Chemical
Ozon Chemical supplies propylene glycol and a full range of solvents — EU-registered, REACH-compliant, with COA/SDS on request and worldwide shipping.
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