PROPYLENE GLYCOL STEARATE- ▸ Cosmetics: Emulsifier and opacifier in creams and lotions
- ▸ Cosmetics: Emollient and texture modifier
- ▸ Food: Emulsifier for processed foods
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Propylene glycol monostearate (CAS 1323-39-3) is the monostearate ester of propylene glycol. It is used as an emulsifier, opacifier, and emollient in cosmetics and as an emulsifier in food applications.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 215-354-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is propylene glycol monostearate used for?
Propylene glycol monostearate (CAS 1323-39-3) is the monostearate ester of propylene glycol, used as an emulsifier, opacifier, and emollient in cosmetics such as creams and lotions, and as an emulsifier in processed foods.
Is there a difference between propylene glycol and propylene glycol monostearate?
Yes. Propylene glycol (CAS 57-55-6) is a small diol, while propylene glycol monostearate (CAS 1323-39-3) is its ester with stearic acid, a waxy emulsifier with formula C21H42O3. They function very differently: one is a solvent/humectant, the other a surface-active emulsifier.
What is the chemical formula of propylene glycol monostearate?
Its molecular formula is C21H42O3, the ester of propylene glycol with one stearic-acid chain. The "Pure" designation indicates a high-monoester grade; the assay is confirmed on the CoA.
What does propylene glycol monostearate do as an emulsifier?
As a lipophilic emulsifier it stabilizes oil-in-water systems and modifies texture and opacity in creams, lotions, and processed foods. It is typically used with a co-emulsifier to balance the HLB of a formulation.
What bulk packaging and grades are available for propylene glycol monostearate pure?
RawSource supplies the pure (high-monoester) grade in bags, drums, and bulk to cosmetic and food manufacturers. Submit your target quantity and required grade for a bulk quote, with a CoA and SDS provided per lot.
What is the REACH and TSCA regulatory status of Propylene Glycol Monostearate (PGMS)?
Propylene Glycol Monostearate (PGMS) (CAS 1323-39-3) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 215-354-3).