Acid Yellow 49

Also known as: Acid Yellow 49, C.I. Acid Yellow 49, C.I. 18640, Acid Yellow GR, 2,5-Dichloro-4-((5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo)benzenesulfonic acid, 4-((5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo)-2,5-dichlorobenzenesulphonic acid, 4-[(E)-(5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)diazenyl]-2,5-dichlorobenzenesulfonic acid, 5-Amino-1-phenyl-4-((2,5-dichloro-4-sulfophenyl)azo)-3-methyl-pyrazole, Benzenesulfonic acid, 4-[(E)-2-(5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)diazenyl]-2,5-dichloro-, einecs 235-473-4, i04-9876

Acid Yellow 49 (CAS 12239-15-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H13Cl2N5O3S and a molecular weight of 426.277 g/mol. Key property: a density of 1.6±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

12239-15-5

Jingsj CID

J-1501321-5

Molecular Formula

C₁₆H₁₃Cl₂N₅O₃S

Molecular Weight

426.277 g/mol

Category

Organic Acids

Last updated

8/21/2026