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CAS 490-79-9

CAS 490-79-9 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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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 Ų
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

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 490-79-9

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How CAS 490-79-9 is used on this site

CAS 490-79-9 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 490-79-9 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.