sodium 5-ethoxy-2-[[4-(phenylazo)phenyl]azo]benzenesulfonate

C.I.酸性黄197

Also known as: 5-Ethoxy-2-[[4-(phenylazo)phenyl]azo]benzenesulfonic acid sodium salt, Benzenesulfonic acid, 5-ethoxy-2-[2-[4-(2-phenyldiazenyl)phenyl]diazenyl]-, sodium salt (1:1), C.I. Acid yellow 197, Einecs 280-220-3, sodium 5-ethoxy-2-[[4-(phenylazo)phenyl]azo]benzenesulphonate, sodium,5-ethoxy-2-[(4-phenyldiazenylphenyl)diazenyl]benzenesulfonate, Benzenesulfonic acid, 5-ethoxy-2-[(E)-2-[4-[(E)-2-phenyldiazenyl]phenyl]diazenyl]-, sodium salt (1:1)

sodium 5-ethoxy-2-[[4-(phenylazo)phenyl]azo]benzenesulfonate (CAS 83221-42-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C20H17N4NaO4S and a molecular weight of 432.42800 g/mol. It is also known as 5-Ethoxy-2-[[4-(phenylazo)phenyl]azo]benzenesulfonic acid sodium salt, Benzenesulfonic acid, 5-ethoxy-2-[2-[4-(2-phenyldiazenyl)phenyl]diazenyl]-, sodium salt (1:1) and C.I. Acid yellow 197. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

83221-42-5

Jingsj CID

J-949856-1

Molecular Formula

C₂₀H₁₇N₄NaO₄S

Chinese Name

C.I.酸性黄197

Molecular Weight

432.42800 g/mol

Category

Organic Acids

Last updated

8/21/2026