Database/Antistatic/Stearamidopropyl Trimonium Methosulfate
Mostly natural · ISO 16128

Is Stearamidopropyl Trimonium Methosulfate natural?

Mostly. Stearic acid is oleochemical and the sulfate group mineral; the aminopropyl linker comes from DMAPA, the methyl groups from methyl chloride and the methoxy from methanol (via dimethyl sulfate), all petrochemical.

INCI nameStearamidopropyl Trimonium Methosulfate
CAS19277-88-4
FormulaC25H54N2O5S · 494.8 Da
FunctionAntistatic · Hair Conditioning
FeedstockStearic acid from palm or tallow is amidated…

How we scored it

Stearoyl C18H35O 267.5 Da + SO3 80.1 Da natural = 347.5; amide NH, propyl, N(CH3)3 and CH3O of methosulfate petrochemical (DMAPA, methyl chloride, methanol). 347.5 / 494.8 = 0.70.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Stearic acid from palm or tallow is amidated with petrochemical DMAPA and quaternised with dimethyl sulfate to give the methosulfate salt. No significant alternative route exists.

In plain English

A conditioning agent for hair and skin that reduces static and helps hair feel smooth. It is a quaternary ammonium compound with a stearic acid (fat-derived) tail and a methyl sulfate counter-ion.

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Structure

2D structure of Stearamidopropyl Trimonium Methosulfate

methyl sulfate;trimethyl-[3-(octadecanoylamino)propyl]azanium

PubChem CID 87995 ↗

References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2Stearamidopropyl Trimonium Methosulfate. PubChem CID 87995. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3STEARAMIDOPROPYL TRIMONIUM METHOSULFATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4STEARAMIDOPROPYL TRIMONIUM METHOSULFATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=STEARAMIDOPROPYL%20TRIMONIUM%20METHOSULFATE