Database/Antistatic/Steardimonium Hydroxypropyl Hydrolyzed Keratin
Mostly natural · ISO 16128

Is Steardimonium Hydroxypropyl Hydrolyzed Keratin natural?

Mostly. A natural protein hydrolysate carrying a small number of quaternary ammonium groups. The peptide, any fatty chain and the chloride are natural; the methylated nitrogen and the hydroxypropyl linker are petrochemical.

INCI nameSteardimonium Hydroxypropyl Hydrolyzed Keratin
FunctionAntistatic · Hair Conditioning
FeedstockProtein hydrolysate reacted with a glycidyl or chlorohydroxypropyl…

How we scored it

Per ~1,000 Da of peptide (natural protein hydrolysate) one quaternary group: stearyl C18H37 253.5 Da (natural) + chloride 35.5 Da (mineral) natural; N + 2×CH3 44.1 Da and hydroxypropyl C3H6O 58.1 Da petrochemical; 1288.9/1391.1 = 0.93. Substitution level is supplier-dependent; the same model is used for every quaternised protein in this wave.
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

Protein hydrolysate reacted with a glycidyl or chlorohydroxypropyl quaternary ammonium reagent.

In plain English

Hydrolysed keratin protein (from hair, wool or feathers) modified with a fatty (stearyl) group to carry a mild positive charge. Used in hair products to improve conditioning and reduce static.

CosIng definition: Keratin hydrolyzates, 2-hydroxy-3-(octadecyldimethylammonio)propyl derivatives, chlorides

Natural alternatives with the same function

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 Arginine 100% natural origin

An amino acid found in skin and hair proteins, used for conditioning and moisture-binding. Made by fermenting plant…

 Asparagine 100% natural origin

An amino acid made by fermenting plant sugars, similar to other food-fermentation processes. Helps condition hair and skin…

 Aspartic Acid 100% natural origin

An amino acid used for skin conditioning and moisture retention. Usually produced by fermentation or by an enzyme…

 Capryloyl Hydrolyzed Collagen 100% natural origin

Collagen broken into small protein fragments and attached to caprylic acid, an eight-carbon fatty acid from coconut or…

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. 2STEARDIMONIUM HYDROXYPROPYL HYDROLYZED KERATIN. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3STEARDIMONIUM HYDROXYPROPYL HYDROLYZED KERATIN. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=STEARDIMONIUM%20HYDROXYPROPYL%20HYDROLYZED%20KERATIN