Official EU label nameGlossary entry 13705

ISOBUTYRIC ACID

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.

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Resolved identifiers

Resolved substance identity

CAS:79-31-2

EC:201-195-7

Ingredient index records:

ISOBUTYRIC ACID

Cosmetic functions: BUFFERING

Isobutyric acid

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1 matched or reported name

ISOBUTYRIC ACID

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name ISOBUTYRIC ACID.

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.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 79-31-2

CAS 79-31-2PubChem CID 6590

Isobutyric Acid

Isobutyric acid is a branched fatty acid comprising propanoic acid carrying a methyl branch at C-2. It has a role as a volatile oil component, a plant metabolite and a Daphnia magna metabolite. It is a fatty acid 4:0, a branched-chain saturated fatty acid and a methyl-branched fatty acid. It is a conjugate acid of an isobutyrate. — ChEBI

IUPAC name: 2-methylpropanoic acid

Molecular formula: C4H8O2
Molecular weight: 88.11 g/mol
Exact mass: 88.052429494 Da
XLogP3: 0.8
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Isobutanoic acidIsopropylformic acidDimethylacetic acidIso-butyric acidPropanoic acid, 2-methyl-Cenex RP b2alpha-Methylpropanoic acidalpha-Methylpropionic acid

16 more reported names

Acetic acid, dimethyl-Propionic acid, 2-methyl-2-METHYL-PROPIONIC ACIDKyselina isomaselnaIsobuttersaeurei-Butyric acid2-methyl-propanoic acidFEMA No. 2222alpha-isobutyric acid2,2-dimethylacetic acid8LL210O1U0NSC-62780CHEBI:161352-methpropanoic acidRefChem:5915201-195-7

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External database identifiers

ChEBI:CHEBI:16135
ChEMBL:CHEMBL108778
EPA DTXSID:DTXSID4021636
PubMed:22925715
PubMed:22809545
PubMed:22736106
PubMed:22731523
PubMed:22682363
PubMed:22666107
PubMed:22612930
PubMed:22606039
PubMed:22589723
PubMed:22589715
PubMed:22571732
PubMed:22479594

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

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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.

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