Official EU label nameGlossary entry 166

2,5-DIHYDROXYBENZOIC 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:490-79-9

EC:207-718-5

Ingredient index records:

2,5-DIHYDROXYBENZOIC ACID

Cosmetic functions: SKIN CONDITIONING

Gentisic acid; 5-Hydroxysalicylic Acid

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1 matched or reported name

2,5-DIHYDROXYBENZOIC ACID

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name 2,5-DIHYDROXYBENZOIC 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 490-79-9

CAS 490-79-9PubChem CID 3469

2,5-Dihydroxybenzoic acid

2,5-dihydroxybenzoic acid is a dihydroxybenzoic acid having the two hydroxy groups at the 2- and 5-positions. It has a role as a MALDI matrix material, an EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor, a mouse metabolite, a fungal metabolite and a human metabolite. It is functionally related to a benzoic acid. It is a conjugate acid of a 2,5-dihydroxybenzoate. — ChEBI

IUPAC name: 2,5-dihydroxybenzoic acid

Molecular formula: C7H6O4
Molecular weight: 154.12 g/mol
Exact mass: 154.02660867 Da
XLogP3: 1.6
Topological polar surface area: 77.8 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

gentisic acidBenzoic acid, 2,5-dihydroxy-5-Hydroxysalicylic acidHydroquinonecarboxylic acidGensigenGensigon2,5-Dhba2,5-Dioxybenzoic acid

16 more reported names

Salicylic acid, 5-hydroxy-Kyselina gentisinovaAcido gentisicoAcide gentisiqueAcidum gentisicumVP36V95O3TNSC-27224CHEBI:17189RefChem:639843207-718-5Gentisinic acidMesalazine EP Impurity GGentisic acid [INN]Gentisinate3,6-dihydroxybenzoic acidNSC 27224

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External database identifiers

ChEBI:CHEBI:17189
ChEMBL:CHEMBL1461
EPA DTXSID:DTXSID4060078
PubMed:22976212
PubMed:22931516
PubMed:22930005
PubMed:22928018
PubMed:22915593
PubMed:22908568
PubMed:22877817
PubMed:22868116
PubMed:22838491
PubMed:22808015
PubMed:22803742
PubMed:22799495

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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