What function does ACETYL ARGININE serve in cosmetics?

According to the EU CosIng inventory, ACETYL ARGININE carries the following function designation(s): HUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT.

What other records share CAS 210545-23-6?

CAS 210545-23-6 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains ACETYL ARGININE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 5425315/10/2010

ACETYL ARGININE

L- Arginine, N(2)-acetyl-

ACETYL ARGININE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 210545-23-6

CAS 210545-23-6PubChem CID 16218842

(S)-2-Acetamido-5-guanidinopentanoic acid dihydrate

IUPAC name: (2S)-2-acetamido-5-(diaminomethylideneamino)pentanoic acid;dihydrate

Molecular formula: C8H20N4O5
Molecular weight: 252.27 g/mol
Exact mass: 252.14336975 Da
Topological polar surface area: 133.0 Å²
Hydrogen-bond donors: 6
Hydrogen-bond acceptors: 6
Covalent units: 3
Defined stereocentres: 1

Also known as

Ac-Arg-OH dihydrateAC-ARG-OH 2H2OAc-Arg-OH.2H2OL-Arginine, N2-acetyl-, hydrate (1:2)Acetyl-L-arginine dihydrateN-ACETYL-L-ARGININE DIHYDRATEN-Acetyl-L-arginine (dihydrate)N-Alpha-Acetyl-L-Arginine Dihydrate

12 more reported names

CS-0102494N-alpha-Acetyl-D-arginine dihydrateC8H16N4O3C8H20N4O5N-ACETYL-L-ARN-a-Acetyl-L-arginine dihydrateHMS548G13HY-W014130ABS-22060T5289J-300022(2S)-2-acetamido-5-guanidino-pentanoic acid;dihydrate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID201347724

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for ACETYL ARGININE

INCI name

ACETYL ARGININE

Description

L- Arginine, N(2)-acetyl-

Record provenance

Inventory reference: 54253
Imported identity: ACETYL ARGININE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for ACETYL ARGININE

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Key data

CAS

210545-23-6

205-846-6

Restriction

—

Function

HUMECTANT: Retaining and/or preserving the moisture in a product during use.
SKIN CONDITIONING: Maintaining the skin in good condition.
SKIN CONDITIONING - EMOLLIENT: Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#593 · ACETYL ARGININE

Ingredients with overlapping formulation functions

ACER SACCHARUM SAP EXTRACTHUMECTANT, SKIN CONDITIONING

ACETAMIDE MEAHAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING, SURFACTANT - CLEANSING, SURFACTANT - FOAM BOOSTING…

ACETAMIDOETHOXYETHANOLHUMECTANT

ACETIC/LINOLEIC/PALMITIC TRIGLYCERIDEHUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ACETYL CYCLODEXTRINFILM FORMING, HUMECTANT, SKIN CONDITIONING, SKIN PROTECTING, VISCOSITY CONTROLLING

ACETYL ETHYLHEXYL POLYHYDROXYSTEARATEHUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ACETYL GALACTOSAMINEHUMECTANT, SKIN CONDITIONING

ACETYL GLUCOSAMINE ETHYL ETHERHUMECTANT, SKIN CONDITIONING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How ACETYL ARGININE appears in the CosIng inventory

The CosIng inventory lists ACETYL ARGININE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

ACETYL ARGININE is also tagged with 3 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

ACETYL ARGININE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, ACETYL ARGININE carries the following function designation(s):

CAS 210545-23-6 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for ACETYL ARGININE

This page reproduces the CosIng inventory entry for ACETYL ARGININE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research ACETYL ARGININE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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