What other records share CAS 19771-63-2?

CAS 19771-63-2 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 OXOTHIAZOLIDINECARBOXYLIC ACID?

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 5805215/10/2010

OXOTHIAZOLIDINECARBOXYLIC ACID

L-2-Oxothiazolidine-4-carboxylic acid

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

INCI Checker Compare all markets Search similar

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.

Markets and their official sources Search every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 19771-63-2

CAS 19771-63-2PubChem CID 72390

Procysteine

(4R)-2-oxo-4-thiazolidinecarboxylic acid is an organonitrogen compound and an organooxygen compound. It is functionally related to an alpha-amino acid. — ChEBI

IUPAC name: (4R)-2-oxo-1,3-thiazolidine-4-carboxylic acid

Molecular formula: C4H5NO3S
Molecular weight: 147.15 g/mol
Exact mass: 146.99901420 Da
XLogP3: -0.1
Topological polar surface area: 91.7 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 1

Also known as

(R)-2-Oxothiazolidine-4-carboxylic acidoxothiazolidinecarboxylic acidKoprosteineL-2-Oxothiazolidine-4-carboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-, (4R)-L-2-Oxo-4-thiazolidinecarboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-, L-(-)-2-Oxo-4-thiazolidinecarboxylic acid

16 more reported names

X7063P804E2-oxo-l-thiazolidine-4-carboxylic acid2-OXO-4-THIAZOLIDINECARBOXYLIC ACID, L-2-oxo-4-thiazolidine carboxylic acidRefChem:930008L-2-OTZD-4-CXA2-Oxothiazolidine-4-carboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-(R)-(-)-2-Oxothiazolidine-4-carboxylic acid(4R)-2-oxothiazolidine-4-carboxylic acid(R)-2-Oxo-4-thiazolidinecarboxylic acidL-2-Oxothiazolidine-4-carboxylateL-2-Thiazolidinone-4-carboxylic Acid4-Thiazolidinecarboxylic acid, 2-oxo-, (R)-C4H5NO3SHMS2051K09

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:125673
ChEMBL:CHEMBL442218
EPA DTXSID:DTXSID501318247
PubMed:10579837
PubMed:9144376
PubMed:7834394
PubMed:7811547

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 OXOTHIAZOLIDINECARBOXYLIC ACID

INCI name

OXOTHIAZOLIDINECARBOXYLIC ACID

Description

L-2-Oxothiazolidine-4-carboxylic acid

Record provenance

Inventory reference: 58052
Imported identity: OXOTHIAZOLIDINECARBOXYLIC ACID
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for OXOTHIAZOLIDINECARBOXYLIC ACID

Browse

Browse EU annexes

Explore Annex II–VI to see which substances are prohibited, restricted or permitted under specific conditions.

Search annex entries

Search the annex database for entries matching OXOTHIAZOLIDINECARBOXYLIC ACID or related substances.

Key data

CAS

19771-63-2

—

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.

#18541 · OXOTHIAZOLIDINECARBOXYLIC ACID

Ingredients with overlapping formulation functions

OXIDIZED STARCH HYDROXYPROPYLTRIMONIUM CHLORIDEHUMECTANT, SKIN CONDITIONING

OXIDIZED TALL OIL ACIDS/NEOPENTYL GLYCOL COPOLYMERFILM FORMING, PLASTICISER, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING

OXIDO REDUCTASESSKIN CONDITIONING

OXO AZAANDROSTENE CARBOXYLOYL DECAPEPTIDE-18SKIN CONDITIONING

OXYGENSKIN CONDITIONING

OXYRIA DIGYNA CALLUS EXTRACTANTIMICROBIAL, ANTIOXIDANT, HAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING, SKIN PROTECTING

OXYRIA DIGYNA EXTRACTSKIN CONDITIONING

OZONIZED ARGAN OILSKIN 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 OXOTHIAZOLIDINECARBOXYLIC ACID appears in the CosIng inventory

The CosIng inventory lists OXOTHIAZOLIDINECARBOXYLIC 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.

OXOTHIAZOLIDINECARBOXYLIC 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

OXOTHIAZOLIDINECARBOXYLIC 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, OXOTHIAZOLIDINECARBOXYLIC ACID carries the following function designation(s):

SKIN CONDITIONING

CAS 19771-63-2 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.

View CAS records

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

Open INCI Checker

Source note for OXOTHIAZOLIDINECARBOXYLIC ACID

This page reproduces the CosIng inventory entry for OXOTHIAZOLIDINECARBOXYLIC 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 OXOTHIAZOLIDINECARBOXYLIC ACID and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

View sources View updates

Tools & next steps

Check your formula

Scan a full INCI list to detect OXOTHIAZOLIDINECARBOXYLIC ACID and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

Find other inventory ingredients and annex entries related to OXOTHIAZOLIDINECARBOXYLIC ACID, its identifiers or nearby name variants.