5-chloro-1,3-dimethyl-4-(2-phenyldiazenyl)-1H-pyrazole

5-氯-1,3-二甲基-4-(2-苯基二氮烯基)-1H-吡唑

Also known as: 5-CHLORO-1,3-DIMETHYL-4-(2-PHENYLDIAZ-1-ENYL)-1H-PYRAZOLE, 5-chloro-1,3-dimethyl-4-phenylazo-1H-pyrazole, 5-CHLORO-1,3-DIMETHYL-4-PHENYLAZOPYRAZOLE, (5-chloro-1,3-dimethylpyrazol-4-yl)-phenyldiazene, 1H-Pyrazole, 5-chloro-1,3-dimethyl-4-(2-phenyldiazenyl)-, 5-chloro-1,3-dimethyl-4-phenyldiazenyl-1,2-diazacyclopenta-2,4-diene, 5-chloro-1,3-dimethyl-4-[(E)-2-phenyldiazenyl]-1H-pyrazole, 5-chloro-1,3-dimethyl-4-(2-phenyldiazen-1-yl)-1H-pyrazole

5-chloro-1,3-dimethyl-4-(2-phenyldiazenyl)-1H-pyrazole (CAS 78431-21-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H11ClN4 and a molecular weight of 234.68500 g/mol. It is also known as 5-CHLORO-1,3-DIMETHYL-4-(2-PHENYLDIAZ-1-ENYL)-1H-PYRAZOLE, 5-chloro-1,3-dimethyl-4-phenylazo-1H-pyrazole and 5-CHLORO-1,3-DIMETHYL-4-PHENYLAZOPYRAZOLE. Key properties include a melting point of 44ºC, a boiling point of 382.9ºC at 760 mmHg, a density of 1.26g/cm3 and a flash point of 185.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

78431-21-7

Jingsj CID

J-1024547-3

Molecular Formula

C₁₁H₁₁ClN₄

Chinese Name

5-氯-1,3-二甲基-4-(2-苯基二氮烯基)-1H-吡唑

Molecular Weight

234.68500 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026