Glyceryl monostearate

Glyceryl monostearate is an emulsifier and anti-staling agent, used in bread, ice cream, whipped toppings and margarine.

Where it is and isn’t permitted

Status of Glyceryl monostearate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 184.1324retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Made by reacting stearic acid with glycerol. Both may come from vegetable oil or from animal fat.

  • Vegan status depends on the source
  • Vegetarian status depends on the source
  • May raise a halal question
  • May raise a kosher question

This is not an omission. What this additive is made from is not fixed — depending on the manufacturer it may be plant, animal or microbial in origin, nobody is required to say which, and the same product can change source between production runs. Ask the manufacturer if it matters to you; a label cannot answer it.

InChIKey
VBICKXHEKHSIBG-UHFFFAOYSA-N
PubChem
CID 24699

Every name it appears under

61 recorded names. A label may use any of them.

CAS registry number

  • 31566-31-1

As it appears in regulation

  • Glyceryl monostearate

Other names

  • 1-Glyceryl stearate
  • 3-Stearoyloxy-1,2-propanediol
  • Abracol S.L.G.
  • Admul
  • Aldo HMS
  • Aldo MS
  • alpha-Monostearin
  • Arlacel 161
  • Arlacel 169
  • Armostat 801
  • Atmul 67
  • Atmul 84
  • Cefatin
  • Cerasynt S
  • Cerasynt SD
  • Cerasynt SE
  • Cerasynt WM
  • Citomulgan M
  • Cyclochem GMS
  • Dermagine
  • Drewmulse TP
  • Drewmulse V
  • Drumulse AA
  • Emcol CA
  • Emcol MSK
  • FEMA No. 2527
  • Glycerin 1-monostearate
  • Glycerin 1-stearate
  • Glycerin monostearate
  • Glycerol alpha-monostearate
  • Glyceryl 1-monostearate
  • Glyceryl monooctadecanoate
  • Glyceryl monostearate
  • Hodag GMS
  • Imwitor 191
  • Imwitor 900K
  • Kessco 40
  • Monelgin
  • Monoglyceryl stearate
  • Monostearate (glyceride)
  • Monostearin
  • Ogeen GRB
  • Ogeen M
  • Ogeen MAV
  • Orbon
  • Protachem GMS
  • Sedetine
  • Starfol GMS 450
  • Starfol GMS 600
  • Starfol GMS 900
  • Stearic acid 1-monoglyceride
  • Stearic monoglyceride
  • Stearin, 1-mono-
  • Stearin, mono-
  • Stearoylglycerol
  • Tegin 515
  • Unimate GMS
  • Witconol MS
  • Witconol MST

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/glyceryl-monostearate.json