Surfactants - Nonionic Available — Bulk Only

Propylene Glycol Monostearate, Self-Emulsifying (PGMS)

PG / MPG
CAS 9004-99-3 · Formula C20H40O3 · MW 328.5 g/mol

A self-emulsifying stearate blend that forms stable oil-in-water emulsions without an added primary surfactant. It is used as an emulsifier and texture agent in cosmetic and food formulations.

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CAS Number
9004-99-3
Formula
C20H40O3
Molecular Weight
328.5 g/mol
Material Family
Surfactants - Nonionic
At a Glance
Material Family
Surfactants - Nonionic
Record Type
Pure compound
Primary Role
Cleaning / Degreasing · Surfactancy
Functional Roles
PEG-90 STEARATE
SURFACTANT - CLEANSING
Applications & Use Cases
  • Cosmetics: Self-emulsifying base for creams and lotions
  • Food: Emulsifier and texture agent
  • Emulsion systems: Oil-in-water emulsifier and opacifier
Physical Properties
Melting Point
MP: 30-34 °C /POLYETHYLENE GLYCOL 400 MONOSTEARATE USP XVI/
Solubility
POLYETHYLENE GLYCOL ESTERS AND ETHERS INCR THE WATER SOLUBILITY OF TYROTHRICIN
Flash Point
MYRJ 45: 260 °C OC
Safety & Handling
Full SDS available on request

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.

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Chemical Identity
CAS Number
9004-99-3
Molecular Formula
C20H40O3
Molecular Weight
328.5 g/mol
IUPAC Name
2-hydroxyethyl octadecanoate
INCI Name
PEG-90 STEARATE
PubChem CID
InChI Key
RFVNOJDQRGSOEL-UHFFFAOYSA-N
Synonyms & Trade Names
Polyoxyethylene Stearate PEG-40 stearate PEG-100 Stearate & Glyceryl Stearate Ethylene glycol monostearate Glycol stearate 2-Hydroxyethyl octadecanoate Monthybase Monthyle Parastarin Ivorit Sedetol Glycol monostearate Prodhybase ethyl Prodhybas N Clindrol SEG Emerest 2350 Ethylene glycol stearate Lipo EGMS Empilan 2848 OCTADECANOIC ACID, 2-HYDROXYETHYL ESTER
Full Description

Self-emulsifying propylene glycol monostearate is an emulsifier blend based on propylene glycol monostearate combined with a small amount of anionic soap to give self-emulsifying behavior. It is used as an emulsifier and texture agent in cosmetic and food formulations.

Frequently Asked Questions

What is propylene glycol monostearate used for?

Self-emulsifying propylene glycol monostearate is used as an emulsifier and texture agent. It serves as a self-emulsifying base for creams and lotions in cosmetics, as an emulsifier and texture agent in food formulations, and as an oil-in-water emulsifier and opacifier in emulsion systems.

Is propylene glycol monostearate an emulsifying agent?

Yes. It is a nonionic emulsifier (CAS 9004-99-3, formula C20H40O3) within the surfactant family. The self-emulsifying grade combines propylene glycol monostearate with a small amount of anionic soap so it disperses without added co-emulsifiers, stabilizing oil-in-water systems.

What makes the self-emulsifying grade different from standard PGMS?

The self-emulsifying grade incorporates a small fraction of anionic soap alongside the propylene glycol monostearate ester. That added anionic component lets the material form emulsions on its own, whereas a non-self-emulsifying ester typically requires a separate primary emulsifier in the formulation.

What CAS number and packaging is bulk propylene glycol monostearate available in?

This material is supplied under CAS 9004-99-3. RawSource distributes it in industrial bulk formats for manufacturers; for available pack sizes (drums, totes, IBCs), MOQ, and a current price, request a bulk quote with your target volume.

Can you provide a CoA and SDS for this emulsifier?

Yes. A Certificate of Analysis and Safety Data Sheet are available with each shipment. Request both with your quote so your formulation and incoming-QC teams can review identity, specification, and handling information before ordering.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.