How do I check if my formula contains HOMOCYSTEIC 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 9860412/10/2020

HOMOCYSTEIC ACID

Homocysteic Acid

HOMOCYSTEIC 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 1001-13-4

CAS 1001-13-4CAS 504-33-6PubChem CID 92117

Homocysteic acid

Homocysteic acid is a non-proteinogenic alpha-amino acid that is homocysteine in which the thiol group has benn oxidised to the corresponding sulfonic acid. It is an amino sulfonic acid, a carboxyalkanesulfonic acid and a non-proteinogenic alpha-amino acid. It is functionally related to a homocysteine. — ChEBI

IUPAC name: 2-amino-4-sulfobutanoic acid

Molecular formula: C4H9NO5S
Molecular weight: 183.19 g/mol
Exact mass: 183.02014356 Da
XLogP3: -3.6
Topological polar surface area: 126.0 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 6
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Amino-4-sulfobutyric acidCHEBI:90324(DL)-homocysteic acidRefChem:390733DL-Homocysteic acid504-33-6Butanoic acid, 2-amino-4-sulfo-C4H9NO5S

16 more reported names

EINECS 207-991-02-amino-4-sulfo-butanoic acidButyric acid, 2-amino-4-sulfo-HYA2G5T79LHOMOCYSTEIC ACID, DL-DL-HOMOCYSTEICACID(+/-)-HOMOCYSTEIC ACIDPDSP2_001254L-HCAd,l-homocysteic acidDL-2-Amino-4-sulfobutyric acidH-DL-HoCysteic acidUNII-HYA2G5T79L2-Amino-4-sulfobutyricacidDL-Homocysteic acid, 97%VBOQYPQEPHKASR-UHFFFAOYSA-

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:90324
EPA DTXSID:DTXSID00864543
PubMed:24478344
PubMed:22690328
PubMed:22165729
PubMed:22108622
PubMed:20720173
PubMed:20577630
PubMed:20133441
PubMed:19963012
PubMed:19467923
PubMed:19341715
PubMed:19074673
PubMed:19046382

Evidence from additional scientific databases

EMBL-EBI ChEBI

Exact identifier matchCHEBI:90324

homocysteic acid

A non-proteinogenic α-amino acid that is homocysteine in which the thiol group has benn oxidised to the corresponding sulfonic acid.

Formula: C4H9NO5S
Average mass: 183.185 g/mol
Monoisotopic mass: 183.02014 Da
Formal charge: 0

amino sulfonic acid — is a (CHEBI:37793)
carboxyalkanesulfonic acid — is a (CHEBI:38031)
non-proteinogenic α-amino acid — is a (CHEBI:83925)

homocysteine — has functional parent (CHEBI:17230)
amino sulfonic acid — is a (CHEBI:37793)
carboxyalkanesulfonic acid — is a (CHEBI:38031)
non-proteinogenic α-amino acid — is a (CHEBI:83925)

26335909 Source: PubMed
27225950 Source: PubMed

Additional curated names

2-amino-4-sulfobutanoic acid2-Amino-4-sulfobutyric acid

Cross-references from this source

CAS: 1001-13-4 — ChemIDplus
REGISTRY_NUMBER: 1783391 — Reaxys

Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2016-06-17. Retrieved: 2026-08-31. Open source record

NIH PubChem PUG-View

Exact identifier match92117

Attributed physical-property, hazard, environmental and use annotations.

Physical Description: White odorless powder; [Alfa Aesar MSDS] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Sources/Uses: Used in proteomics research; [Santa Cruz Biotech] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
EMBL-EBI ChEBI	Exact match	2026-08-31
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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 HOMOCYSTEIC ACID

INCI name

HOMOCYSTEIC ACID

Description

Homocysteic Acid

Record provenance

Inventory reference: 98604
Imported identity: HOMOCYSTEIC ACID
Source update: 12/10/2020

European Commission CosIng source notes

Annex records for HOMOCYSTEIC 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 HOMOCYSTEIC ACID or related substances.

Key data

CAS

1001-13-4; 504-33-6

-; 207-991-0

Restriction

—

Function

EXFOLIATING: Initiating and/or accelerating removal of the layers of dead skin cells from the skin surface.

Official EU ingredient-name evidence

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

#12104 · HOMOCYSTEIC ACID

Ingredients with overlapping formulation functions

FRANGULA ALNUS POWDEREXFOLIATING

GANODERMA SINENSE POWDEREXFOLIATING

GOSSYPIUM HERBACEUM SEEDEXFOLIATING

HIBISCUS SABDARIFFA SEED POWDERABRASIVE; EXFOLIATING

HYDROLYZED ALPHA-GLUCAN POLYSACCHARIDEABSORBENT; BINDING; EMULSION STABILISING; FILM FORMING; OPACIFYING; EXFOLIATING

HYMENAEA COURBARIL SEEDCOAT POWDERABRASIVE, ABSORBENT, EXFOLIATING

ILLICIUM VERUM FRUIT POWDEREXFOLIATING

INULA RACEMOSA ROOT POWDEREXFOLIATING

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 HOMOCYSTEIC ACID appears in the CosIng inventory

The CosIng inventory lists HOMOCYSTEIC 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.

HOMOCYSTEIC 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

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

EXFOLIATING

CAS 1001-13-4; 504-33-6 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.

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 HOMOCYSTEIC ACID

This page reproduces the CosIng inventory entry for HOMOCYSTEIC 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 HOMOCYSTEIC 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 HOMOCYSTEIC ACID and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

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