Benzenesulfonic acid, 4,4'-[(phenylmethylene)bis[4,1-phenylene-2,1-diazenediyl(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[3-chloro-5-methyl-, sodium salt (1:2)

4,4'-[(苯亚甲基)二[4,1-亚苯基偶氮基(4,5-二氢-3-甲基-5-氧代-1H-吡唑-4,1-二基)]]二(3-氯-5-甲基苯磺酸)二钠盐

Also known as: Azo Milling Yellow Extra, Benzenesulfonic acid, 4,4'-((phenylmethylene)bis(4,1-phenylene-2,1-diazenediyl(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(3-chloro-5-methyl-, sodium salt (1:2), disodium 4,4'-[(phenylmethylene)bis[4,1-phenyleneazo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[3-chloro-5-methylbenzenesulfonate], disodium 4,4'-{(phenylmethanediyl)bis[benzene-4,1-diyl(e)diazene-2,1-diyl(3-methyl-5-oxo-4,5-dihydro-1H-pyrazole-4,1-diyl)]}bis(3-chloro-5-methylbenzenesulfonate), EINECS 229-467-0

Benzenesulfonic acid, 4,4'-[(phenylmethylene)bis[4,1-phenylene-2,1-diazenediyl(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[3-chloro-5-methyl-, sodium salt (1:2) (CAS 6548-24-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C41H32Cl2N8Na2O8S2 and a molecular weight of 945.75700 g/mol. It is also known as Azo Milling Yellow Extra, Benzenesulfonic acid, 4,4'-((phenylmethylene)bis(4,1-phenylene-2,1-diazenediyl(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(3-chloro-5-methyl-, sodium salt (1:2) and disodium 4,4'-[(phenylmethylene)bis[4,1-phenyleneazo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[3-chloro-5-methylbenzenesulfonate]. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

6548-24-9

Jingsj CID

J-1503014-4

Molecular Formula

C₄₁H₃₂Cl₂N₈Na₂O₈S₂

Chinese Name

4,4'-[(苯亚甲基)二[4,1-亚苯基偶氮基(4,5-二氢-3-甲基-5-氧代-1H-吡唑-4,1-二基)]]二(3-氯-5-甲基苯磺酸)二钠盐

Molecular Weight

945.75700 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026