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CAS: 2592-95-2 ,1-Hydroxybenzotrizole


Basic information
cas: 2592-95-2
English name: 1 Hydroxybenzotriazole
English alias: N Hydroxybenzotrizole; N-hydroxy-benzotriazole; 1H-Benzotriazole, 1-hydroxy-; BENZOTRIAZOL-1-OL; 1, 2, 3 - Benzotriazol - 1 - ol; 1 h - Benzo [d] [1, 2, 3] triazol - 1 - ol; HBT; 1 - hydroxy - 1, 2, 3 - benzotriazole; 1-HOB; HOBt solution; HOBT; HOBTA; 1 - hydroxy - 1 h - 1, 2, 3 - benzotriazole; 1-Oxy-benztriazol; Benzazimidol;
Molecular formula: C6H5N3O
Molecular weight: 135.12300
Accurate mass: 135.04300
PSA: 61.80000
LOGP: 0.66350

Physicochemical property
Appearance and properties: White to light yellow powder
Density: 1 g/cm3
Boiling point: 149-150 °C
Melting point: 156-159°C
Flash point: 95 °C
Refractive index: n20/D 1.488
Stability: Stable, but possible risk of explosion if heated under confinement. Flammable.
Storage condition: Store at RT.
Vapor pressure: 3.28E-05mmHg at 25°C
Safety information
RTECS number: DM1288000
Safety note: S16-S33-S7/9-S26-S45-S53-S15
Danger class code: R11; R5
Customs Code: 2933990090
Dangerous goods transport code: 1325
Danger category: 4.1
Packing grade: III
Dangerous Goods Mark: F
Production method and application
Production method
It is prepared by the reaction of o-nitrophenylhydrazine with ammonia.


Polypeptide synthesis carboxylic acid activator, drug intermediate.

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