3-[(4-amino-3-methoxyphenyl)azo]benzenesulfonic acid

3-[(4-氨基-3-甲氧基苯基)偶氮]-苯磺酸

Also known as: 3-methoxy-4-amino azo benzene-3'-sulfonic acid, 4-amino-3-methoxyazobenzene-3'-sulfonic acid, 4-(3-sulfophenylazo)-2-methoxyaniline, 3-[(4-amino-3-methoxyphenyl)diazenyl]benzenesulfonic acid, 3-METHOXY-4-AMINO AZO BENZENE-3'-SULFONIC ACID, m-[(4-amino-3-methoxyphenyl)azo]benzenesulfonic acid

3-[(4-amino-3-methoxyphenyl)azo]benzenesulfonic acid (CAS 138-28-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C13H13N3O4S and a molecular weight of 307.32500 g/mol. It is also known as 3-methoxy-4-amino azo benzene-3'-sulfonic acid, 4-amino-3-methoxyazobenzene-3'-sulfonic acid and 4-(3-sulfophenylazo)-2-methoxyaniline. Key property: a density of 1.43 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

138-28-3

Jingsj CID

J-3447-8

Molecular Formula

C₁₃H₁₃N₃O₄S

Chinese Name

3-[(4-氨基-3-甲氧基苯基)偶氮]-苯磺酸

Molecular Weight

307.32500 g/mol

Category

Organic Acids

Last updated

8/21/2026