4-Hydroxybenzoic acid

4-羟基苯甲酸

Also known as: p-Hydroxybenzoic acid, 4-Carboxyphenol, p-Salicylic acid, p-carboxyphenol, para-Hydroxybenzoic acid, Benzoic acid, 4-hydroxy-, ACETYLSALICYLIC ACID IMPURITY A (ASPIRIN IMPURITY A), PROPYL PARAHYDROXYBENZOATE IMP. A (EP): 4-HYDROXYBENZOIC ACID

CAS No.
99-96-7
Jingsj CID
J-8741-0
Molecular Formula
C7H6O3
Chinese Name
4-羟基苯甲酸
Molecular Weight
138.121 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point213-217 °C(lit.)
Boiling Point336.2±25.0 °C at 760 mmHg
Density1.4±0.1 g/cm3
Flash Point171.3±19.7 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 4-Hydroxybenzoic acid?

99-96-7

What are the molecular formula and molecular weight of 4-Hydroxybenzoic acid?

C7H6O3, molecular weight 138.121 g/mol

Is 4-Hydroxybenzoic acid hazardous?

Warning

Data compiled from public chemical databases and supplier catalogs; verify specifications with suppliers before purchase. · Last updated: 8/21/2026