Structural Formula Vector Image
Title: Sulfaphenazole
CAS Registry Number: 526-08-9
CAS Name: 4-Amino-N-(1-phenyl-1H-pyrazol-5-yl)benzenesulfonamide
Additional Names: N¢-(1-phenylpyrazol-5-yl)sulfanilamide; 1-phenyl-5-sulfanilamidopyrazole; 3-(p-aminobenzenesulfonamido)-2-phenylpyrazole
Molecular Formula: C15H14N4O2S
Molecular Weight: 314.36
Percent Composition: C 57.31%, H 4.49%, N 17.82%, O 10.18%, S 10.20%
Literature References: Synthesis: Schmidt, Druey, Helv. Chim. Acta 41, 309 (1958); Druey, Schmidt, US 2858309 (1958 to Ciba). Toxicity study: Seki et al., Arzneim.-Forsch. 15, 1441 (1965).
Properties: Crystals from alcohol, mp 179-183°. Very sparingly sol in water: 0.15 g/100 ml H2O at pH 7.0 and 25°. More sol in methanol, ethanol, glacial acetic acid. LD50 orally in mice: 5800 mg/kg (Seki).
Melting point: mp 179-183°
Toxicity data: LD50 orally in mice: 5800 mg/kg (Seki)
Derivative Type: Sodium salt monohydrate
Molecular Formula: C15H13N4NaO2S.H2O
Molecular Weight: 354.36
Percent Composition: C 50.84%, H 4.27%, N 15.81%, Na 6.49%, O 13.55%, S 9.05%
Properties: White powder. Sol in water. A 10% soln (w/w) has a pH of ~9.
Therap-Cat: Antibacterial.
Therap-Cat-Vet: Antibacterial.
Keywords: Antibacterial (Synthetic); Sulfonamides.

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