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CAS 997-55-7 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.

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InventoryRef 9204723/09/2014

ACETYL ASPARTIC ACID

N-Acetyl- L-Aspartic Acid,(2S)-2-Acetamidobutanedioic acid

ACETYL ASPARTIC ACID 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 997-55-7

CAS 997-55-7PubChem CID 65065

N-Acetyl-L-Aspartic Acid

N-acetyl-L-aspartic acid is an N-acyl-L-aspartic acid in which the acyl group is specified as acetyl. It has a role as an antioxidant, a nutraceutical, a mouse metabolite, a human metabolite and a rat metabolite. It is a N-acetyl-L-amino acid and a N-acyl-L-aspartic acid. It is a conjugate acid of a N-acetyl-L-aspartate(2-). — ChEBI

IUPAC name: (2S)-2-acetamidobutanedioic acid

Molecular formula: C6H9NO5
Molecular weight: 175.14 g/mol
Exact mass: 175.04807239 Da
XLogP3: -1.1
Topological polar surface area: 104.0 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 1

Also known as

Acetyl-L-aspartic acidN-AcetylaspartateAcetylaspartic acidL-Aspartic acid, N-acetyl-L-N-Acetylaspartic acidAcetyl aspartic acidN-acetyl-s-aspartic acid(S)-2-(acetylamino)butanedioic acid

16 more reported names

Aspartic acid, N-acetyl-, L-(S)-2-(acetylamino)succinic acid445Y04YIWRCHEBI:21547NSC-128610n-acetyl aspartateAcetylaspartatic AcidN-Acetylaspartatic AcidRefChem:828879213-643-9Ac-Asp-OHN-Acetylaspartic acid(S)-2-Acetamidosuccinic acidN-Acetyl-L-aspartate(S)-2-AcetamidosuccinateCAS-997-55-7

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:21547
ChEMBL:CHEMBL1162494
EPA DTXSID:DTXSID40897219
PubMed:23110183
PubMed:23092982
PubMed:23044025
PubMed:23043888
PubMed:23039385
PubMed:23015331
PubMed:22981426
PubMed:22958351
PubMed:22943908
PubMed:22938985
PubMed:22917526
PubMed:22914832

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 ASPARTIC ACID

INCI name

ACETYL ASPARTIC ACID

Description

N-Acetyl- L-Aspartic Acid,(2S)-2-Acetamidobutanedioic acid

Record provenance

Inventory reference: 92047
Imported identity: ACETYL ASPARTIC ACID
Source update: 23/09/2014

European Commission CosIng source notes

Annex records for ACETYL ASPARTIC ACID

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Key data

CAS

997-55-7

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Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.

Official EU ingredient-name evidence

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

#594 · ACETYL ASPARTIC ACID

Ingredients with overlapping formulation functions

ACETOBACTER/SACCHAROMYCES/RASPBERRY FRUIT EXTRACT/PUNICA GRANATUM FRUIT EXTRACT…SKIN CONDITIONING

ACETOBACTER/SACCHAROMYCES/RICE KERNEL FERMENTSKIN CONDITIONING

ACETOXYANDROSTENEDIONESKIN CONDITIONING

ACETYL ARGININEHUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ACETYL BENZOYLOXY PRASTERONEANTIOXIDANT, SKIN CONDITIONING

ACETYL BETA-ALANYL TRIPEPTIDE-50SKIN CONDITIONING

ACETYL BETA-BOSWELLIC ACIDSKIN CONDITIONING

ACETYL CARNITINESKIN 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 ASPARTIC ACID appears in the CosIng inventory

The CosIng inventory lists ACETYL ASPARTIC ACID 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 ASPARTIC ACID is also tagged with 1 cosmetic function 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 ASPARTIC ACID 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 ASPARTIC ACID carries the following function designation(s):

SKIN CONDITIONING

CAS 997-55-7 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 ASPARTIC ACID

This page reproduces the CosIng inventory entry for ACETYL ASPARTIC ACID 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 ASPARTIC ACID 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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