2-hydroxy-5-(phenyldiazenyl)benzoic acid

Also known as: 5-(phenylazo)salicylic acid, 2-hydroxy-5-phenylazo-benzoic acid, 2-hydroxy-5-phenyldiazenyl benzoic acid, 2-Hydroxy-5-(2-phenyldiazenyl)benzoic Acid, 2-Hydroxy-5-[(E)-phenyldiazenyl]benzoic acid, 4-hydroxyazobenzene-3-carboxylic acid, 6-oxo-3-(phenylhydrazinylidene)cyclohexa-1,4-diene-1-carboxylic acid, Benzoic acid, 2-hydroxy-5-(phenylazo)-, CK 46A, NSC 163392, Phenylazosalicylic Acid, Mesalazine Impurity I, Mesalamine EP Impurity I

2-hydroxy-5-(phenyldiazenyl)benzoic acid (CAS 3147-53-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C13H10N2O3 and a molecular weight of 242.230 g/mol. Key properties include a boiling point of 472.7±40.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 239.7±27.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3147-53-3
Jingsj CID: J-1003009-8
Molecular Formula: C₁₃H₁₀N₂O₃
Molecular Weight: 242.230 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	472.7±40.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	239.7±27.3 °C
Exact Mass	242.069138
PSA	82.25000
LogP	3.88
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.627

Customs & Trade Information

HS Code	2927000090
Summary	2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2-hydroxy-5-(phenyldiazenyl)benzoic acid?

The CAS number of 2-hydroxy-5-(phenyldiazenyl)benzoic acid is 3147-53-3.

What are the molecular formula and molecular weight of 2-hydroxy-5-(phenyldiazenyl)benzoic acid?

2-hydroxy-5-(phenyldiazenyl)benzoic acid has molecular formula C13H10N2O3 and molecular weight 242.230 g/mol.

What are the upstream and downstream products of 2-hydroxy-5-(phenyldiazenyl)benzoic acid?

For 2-hydroxy-5-(phenyldiazenyl)benzoic acid, Upstream Products: Benzenediazonium chloride, Salicylic acid, Carbon dioxide; Downstream Products: N-Acetyl Mesalazine, 2-Hydroxy-5-[(4-sulfophenyl)diazenyl]benzoic acid, 5-Aminosalicylic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "2-hydroxy-5-(phenyldiazenyl)benzoic acid (CAS 3147-53-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1003009-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.