4,4'-bis[3-carboxy-5-oxo-1-(4-sulfophenyl)-2-pyrazolin-4-yl]pentamethine oxonole dipotassium salt

4-[5-[3-羧基-5-羟基-1-(4-磺苯基)-1H-吡唑-4-基]-2,4-亚戊二烯基]-4,5-二氢-5-氧代-1-(4-磺苯基)-1H-吡唑-3-羧酸二钾盐

Also known as: OXONOLE BLUE, OXONOLE BLUE, DIPOTASSIUM SALT, 1,1'-bis(4-sulfophenyl)-3,3'-dicarboxy-5,5'-dihydroxypyrazolo-4,4'-penta-methine oxonole dipotassium salt, PINA(R) OXONOL BLUE 628, 1H-Pyrazole-3-carboxylic acid, 4-[5-[3-carboxy-5-hydroxy-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-2,4-pentadienylidene]-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, dipotassium salt

4,4'-bis[3-carboxy-5-oxo-1-(4-sulfophenyl)-2-pyrazolin-4-yl]pentamethine oxonole dipotassium salt (CAS 51858-17-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C25H16K2N4O12S2 and a molecular weight of 706.74100 g/mol. It is also known as OXONOLE BLUE, OXONOLE BLUE, DIPOTASSIUM SALT and 1,1'-bis(4-sulfophenyl)-3,3'-dicarboxy-5,5'-dihydroxypyrazolo-4,4'-penta-methine oxonole dipotassium salt. Key properties include a melting point of 250ºC (dec.)(lit.) and a flash point of 113 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

51858-17-4

Jingsj CID

J-34715-0

Molecular Formula

C₂₅H₁₆K₂N₄O₁₂S₂

Chinese Name

4-[5-[3-羧基-5-羟基-1-(4-磺苯基)-1H-吡唑-4-基]-2,4-亚戊二烯基]-4,5-二氢-5-氧代-1-(4-磺苯基)-1H-吡唑-3-羧酸二钾盐

Molecular Weight

706.74100 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026