Database/Emollient/Acetyl Arginine
Mostly natural · ISO 16128

Is Acetyl Arginine natural?

Mostly. A natural amino acid carrying one petrochemical acetyl cap, which makes up about a fifth of the molecule's mass.

INCI nameAcetyl Arginine
CAS210545-23-6
FormulaC8H16N4O3 · 216.24 Da
FunctionEmollient · Humectant
FeedstockThe arginine backbone is fermentation-derived; the acetyl group…

How we scored it

Arginine (natural amino acid, 174.2 Da) + acetyl cap from acetic anhydride (petrochemical) 42.0 Da = 216.24 Da; 174.2/216.24 = 0.81.
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

The arginine backbone is fermentation-derived; the acetyl group is added using acetic anhydride, a petrochemical reagent.

In plain English

A modified form of the amino acid arginine, used to moisturise and condition skin. Most of its weight comes from natural, fermentation-derived arginine.

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Structure

2D structure of Acetyl Arginine

(2S)-2-acetamido-5-(diaminomethylideneamino)pentanoic acid

PubChem CID 67427 ↗

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. 2Acetyl Arginine. PubChem CID 67427. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACETYL ARGININE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACETYL ARGININE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACETYL%20ARGININE