5-(3-amino-5-oxo-2-pyrazolin-1-yl)-2-phenoxybenzenesulfonic acid

5-(3-氨基-5-氧代-2-吡唑啉-1-基)-2-苯氧基苯磺酸

Also known as: 5-(3-amino-5-oxo-4H-pyrazol-1-yl)-2-phenoxybenzenesulfonic acid, 5-(3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-phenoxybenzenesulfonic acid, 3-amino-1-(4-phenoxy-3-sulfophenyl)-2-pyrazolin-5-one, 5-(3-amino-5-oxo-2,5-dihydro-pyrazol-1-yl)-2-phenoxy-benzenesulfonic acid, benzenesulfonic acid, 5-(3-amino-4,5-dihydro-5-oxo-1H-pyrazol-1-yl)-2-phenoxy-, amino-5-oxo-2-pyrazolinyl-2-phenoxybenzenesulfonic acid, LABOTEST-BB LT00080651, 5-(3-AMINO-5-OXO-2-PYRAZOLIN-1-YL)-2-PHENOXYBENZENESULFONIC ACID/TECH., 92%

5-(3-amino-5-oxo-2-pyrazolin-1-yl)-2-phenoxybenzenesulfonic acid (CAS 30479-81-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C15H13N3O5S and a molecular weight of 347.34600 g/mol. It is also known as 5-(3-amino-5-oxo-4H-pyrazol-1-yl)-2-phenoxybenzenesulfonic acid, 5-(3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-phenoxybenzenesulfonic acid and 3-amino-1-(4-phenoxy-3-sulfophenyl)-2-pyrazolin-5-one. Key properties include a melting point of 297ºC (dec.)(lit.) and a density of 1.56g/cm3. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

30479-81-3

Jingsj CID

J-1992623-2

Molecular Formula

C₁₅H₁₃N₃O₅S

Chinese Name

5-(3-氨基-5-氧代-2-吡唑啉-1-基)-2-苯氧基苯磺酸

Molecular Weight

347.34600 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026