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55299-24-6

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Basic Information
CAS No.: 55299-24-6
Name: ST-720
Molecular Structure:
Molecular Structure of 55299-24-6 (ST-720)
Formula: C18H18ClOSi
Molecular Weight: 313.90
Synonyms: ST 720;2H-1,4-BENZODIAZEPIN-2-ONE,1,3-DIHYDRO-7-CHLORO-5-PHENYL-1-TRIMETHYLSILYL;Trimethylsilyl nordazepam;7-Chloro-1,3-dihydro-5-phenyl-1-trimethylsilyl-2H-1,4-benzodiazepin-2-one;
Density: 1.16g/cm3
Boiling Point: 427°C at 760 mmHg
Flash Point: 212.1°C
Safety: Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic fumes of Cl−. See also DIAZEPAM.
PSA: 32.67000
LogP: 3.85950
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Chemistry

Molecular structure of 7-Chloro-1,3-dihydro-5-phenyl-1-trimethylsilyl-2H-1,4-benzodiazepin-2-one (CAS NO.55299-24-6) is:

Product Name: 7-Chloro-1,3-dihydro-5-phenyl-1-trimethylsilyl-2H-1,4-benzodiazepin-2-one
CAS Registry Number: 55299-24-6
IUPAC Name: 7-chloro-5-phenyl-1-trimethylsilyl-3H-1,4-benzodiazepin-2-one
Molecular Weight: 342.89476 [g/mol]
Molecular Formula: C18H19ClN2OSi
H-Bond Donor: 0
H-Bond Acceptor: 2
Surface Tension: 36.1 dyne/cm
Density: 1.16 g/cm3
Flash Point: 212.1 °C
Enthalpy of Vaporization: 68.19 kJ/mol
Boiling Point: 427 °C at 760 mmHg
Vapour Pressure: 1.69E-07 mmHg at 25°C 
Classification Code: Drug / Therapeutic Agent

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 600mg/kg (600mg/kg)   Annales Pharmaceutiques Francaises. Vol. 36, Pg. 621, 1978.
mouse LD50 oral 1gm/kg (1000mg/kg)   Annales Pharmaceutiques Francaises. Vol. 36, Pg. 621, 1978.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic fumes of Cl−. See also DIAZEPAM.

Specification

 7-Chloro-1,3-dihydro-5-phenyl-1-trimethylsilyl-2H-1,4-benzodiazepin-2-one , its cas register number is 55299-24-6. It also can be called ST 720 ; ST 720 [French] ; Trimethyl silyl-1 chloro-7 dihydro-1-3, phenyl-5 2H benzodiazepine 1-4 one-2 ; Trimethyl silyl-1 chloro-7 dihydro-1-3, phenyl-5 2H benzodiazepine 1-4 one-2 [French] ; 2H-1,4-Benzodiazepin-2-one, 1,3-dihydro-7-chloro-5-phenyl-1-trimethylsilyl- .