2,5-二羟基苯甲酸

Description

2,5-Dihydroxy benzoic acid · CAS 490-79-9 · C7H6O4. UNII VP36V95O3T. Melting Point: 199.5 °C; Solubility: 5.0 mg/mL at 5 °C; Vapor Pressure: 0.0000021 [mmHg].

Identification

CAS Registry Number	490-79-9
PubChem CID	3469
Molecular formula	C7H6O4
IUPAC name	2,5-dihydroxybenzoic acid
UNII (FDA)	VP36V95O3T

Computed Descriptors

Molecular Weight	154.12
XLogP3	1.6
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	1
Exact Mass	154.02660867
Monoisotopic Mass	154.02660867
Topological Polar Surface Area	77.8
Heavy Atom Count	11
Formal Charge	0

Physical & Chemical Properties

Melting Point	199.5 °C
Solubility	5.0 mg/mL at 5 °C
Vapor Pressure	0.0000021 [mmHg]
LogP	1.74
LogP	1.12
Collision Cross Section	125 Ų [M-H]-

Physical description & handling notes

• Solid; [Merck Index] Light yellow crystals; [Aldrich MSDS]
• Solid
• 122.67 Ų [M-H]- [CCS Type: DT; Method: single field calibrated with Agilent tune mix (Agilent)]

Regulatory Status

GHS notification summary	1.5% (1 / 67)

GHS Hazard Classification

GHS notification summary	1.5% (1 / 67)
Reported hazard statements	H302 (94%), H315 (94%), H319 (94%), H335 (92.5%)

Documented Uses

• Excreted in urine of dogs following ingestion of salicylates; Used therapeutically (analgesic and anti-inflammatory); [Merck Index] An oxidative product of saligenin; [ChemIDplus] Used as an analgesic medicine; [Hawley]
• Synthetic Polymer MALDI Matrix Compounds
• Information on 1 consumer products that contain Gentisic acid in the following categories is provided:
• Benzoic acid, 2,5-dihydroxy-: ACTIVE
• 5-hydroxylation is a known human metabolite of salicylic acid.

Synonyms

2,5-DIHYDROXYBENZOIC ACID; gentisic acid; 490-79-9; Benzoic acid, 2,5-dihydroxy-; 5-Hydroxysalicylic acid; Hydroquinonecarboxylic acid; Gensigen; Gensigon; 2,5-Dhba; 2,5-Dioxybenzoic acid; Salicylic acid, 5-hydroxy-; Kyselina gentisinova; Acido gentisico; Acide gentisique; Acidum gentisicum; VP36V95O3T

Frequently Asked Questions

What are the CAS number and molecular formula of 2,5-Dihydroxy benzoic acid?

CAS 490-79-9; molecular formula C7H6O4; molecular weight — g/mol.

What other names is 2,5-Dihydroxy benzoic acid known by?

2,5-DIHYDROXYBENZOIC ACID, gentisic acid, 490-79-9, Benzoic acid, 2,5-dihydroxy-, 5-Hydroxysalicylic acid, Hydroquinonecarboxylic acid.

Is 2,5-Dihydroxy benzoic acid classified as hazardous?

1.5% of GHS notifications report no hazard classification (1 of 67).

What are the key physical properties of 2,5-Dihydroxy benzoic acid?

Melting Point: 199.5 °C; Solubility: 5.0 mg/mL at 5 °C; Vapor Pressure: 0.0000021 [mmHg]; LogP: 1.74.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.