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Official EU label nameGlossary entry 260

3,4-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.

0 markets with evidence
Markets checked
13
Markets with evidence
0
Evidence gaps
13
Resolved identifiers
2

Resolved substance identity

CAS:99-50-3
EC:202-760-0
Ingredient index records:
3,4-DIHYDROXYBENZOIC ACID
Cosmetic functions: SKIN PROTECTING

3,4-Dihydroxybenzoic acid

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1 matched or reported name
3,4-DIHYDROXYBENZOIC ACID

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name 3,4-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 99-50-3
CAS 99-50-3PubChem CID 72

Protocatechuic Acid

3,4-dihydroxybenzoic acid is a dihydroxybenzoic acid in which the hydroxy groups are located at positions 3 and 4. It has a role as an EC 1.14.11.2 (procollagen-proline dioxygenase) inhibitor, an antineoplastic agent, a plant metabolite, a human xenobiotic metabolite and an EC 1.1.1.25 (shikimate dehydrogenase) inhibitor. It is a dihydroxybenzoic acid and a member of catechols. It is functionally related to a benzoic acid. It is a conjugate acid of a 3,4-dihydroxybenzoate. — ChEBI

IUPAC name
3,4-dihydroxybenzoic acid
Molecular formula
C7H6O4
Molecular weight
154.12 g/mol
Exact mass
154.02660867 Da
XLogP3
1.1
Topological polar surface area
77.8 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
0

Also known as

4-Carboxy-1,2-dihydroxybenzeneProtocatehuic acid4,5-Dihydroxybenzoic acid36R5QJ8L4BNSC-16631FEMA NO. 4430CHEBI:36062RefChem:25857
16 more reported names
202-760-0protocatechuateBenzoic acid, 3,4-dihydroxy-3,4-Dihydroxybenzoicacid3,4-Dihydroxy Benzoic AcidprotocatechuicacidCarbohydroquinonic acidCCRIS 62913,4-dihydroxy-benzoic acidEINECS 202-760-0NSC 16631Catechol-4-carboxylic AcidBRN 14488411ykp3, 4-Dihydroxybenzoic acidUNII-36R5QJ8L4B
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External database identifiers

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 assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortalUS 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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