Structural Formula Vector Image
Title: Benzoylpas
CAS Registry Number: 13898-58-3
CAS Name: 4-(Benzoylamino)-2-hydroxybenzoic acid
Additional Names: N-benzoyl-p-aminosalicylic acid; 4-benzamidosalicylic acid
Molecular Formula: C14H11NO4
Molecular Weight: 257.24
Percent Composition: C 65.37%, H 4.31%, N 5.44%, O 24.88%
Literature References: Prepn: Drain et al., J. Chem. Soc. 1949, 1498; GB 676363 (1952 to Wander). Prepn of sodium and calcium salts: Suddaby, Sumpter, GB 711163 (1954 to Herst).
Properties: Crystals, mp 260-261°.
Melting point: mp 260-261°
Derivative Type: Calcium salt pentahydrate
CAS Registry Number: 5631-00-5
Additional Names: Benzoylpas calcium
Trademarks: Therapas (Smith & Nephew)
Molecular Formula: C28H20CaN2O8.5H2O
Molecular Weight: 642.62
Percent Composition: C 52.33%, H 4.71%, Ca 6.24%, N 4.36%, O 32.37%
Properties: White powder or crystals.
Derivative Type: Mixture of calcium salt with isoniazid
Trademarks: Iso-Benzacyl (Novartis)
Therap-Cat: Antibacterial (tuberculostatic).
Keywords: Antibacterial (Tuberculostatic).

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