Official EU label nameGlossary entry 22737

POTASSIUM PCA

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence

Markets checked

Markets with evidence

Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:4810-50-8

EC:225-373-9

Ingredient index records:

POTASSIUM PCA

Cosmetic functions: HUMECTANT

Potassium 5-oxo-L-prolinate

Open full local profile

1 matched or reported name

POTASSIUM PCA

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name POTASSIUM PCA.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

Check the markets and their sources Search every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 4810-50-8

CAS 4810-50-8PubChem CID 23684897

Potassium pidolate

The CIR Expert Panel concluded that PCA (i.e., 2-pyrrolidone-5-carboxylic acid), calcium PCA, magnesium PCA, potassium PCA, and sodium PCA are safe in cosmetics in the present practices of use and concentration described in this safety assessment. PCA and its salts should not be used in cosmetic products in which N-nitroso compounds can be formed. — Cosmetic Ingredient Review (CIR)

IUPAC name: potassium (2S)-5-oxopyrrolidine-2-carboxylate

Molecular formula: C5H6KNO3
Molecular weight: 167.20 g/mol
Exact mass: 166.99847454 Da
Topological polar surface area: 69.2 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 1

Also known as

Potassium 5-oxo-L-prolinatePotassium PCAKALIDONEEINECS 225-373-9H004M3556QL-Proline, 5-oxo-, monopotassium saltPOTASSIUM L-PYROGLUTAMATEPOTASSIUM PIDOLATE [WHO-DD]

12 more reported names

PROLINE, 5-OXO-, POTASSIUM SALT, L-POTASSIUM (S)-2-PYRROLIDONE-5-CARBOXYLATEL-PROLINE, 5-OXO-, POTASSIUM SALT (1:1)(S)-PYRROLIDONE-5-CARBOXYLIC ACID POTASSIUM SALTRefChem:867986POTASSIUM PCA [INCI]225-373-9potassium;(2S)-5-oxopyrrolidine-2-carboxylatePotassium (S)-5-oxopyrrolidine-2-carboxylateUNII-H004M3556Qpotassium pyroglutamatePotassium(S)-5-oxopyrrolidine-2-carboxylate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID40197423

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

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 US EPA CompTox CTX APIs

Take this record further

Screen in a formula Open standalone comparison

Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

Open official Decision