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Home/Compounds/API/7-chloro-5-(2-chlorophenyl)-1,3-dihydro-2H-1,4-benzodiazepin-2-one 4-oxide
C15H10Cl2N2O2
321.2 g/mol
API

7-Chloro-5-(2-chlorophenyl)-1,3-dihydro-2H-1,4-benzodiazepin-2-one 4-Oxide

CAS2955-37-5
Category
API
Compound Class
Heterocycle
Primary Use
Pharmaceutical Raw Material

This compound is an impurity reference standard for lorazepam, a benzodiazepine derivative. It is used in pharmaceutical manufacturing and quality control to ensure the purity and safety of the active pharmaceutical ingredient.

active pharmaceutical ingredient impurity reference standardpharmaceutical quality control

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Customs Tariff Classification

The international HS code for 7-Chloro-5-(2-chlorophenyl)-1,3-dihydro-2H-1,4-benzodiazepin-2-one 4-Oxide (CAS 2955-37-5) is 2933.99.

HS code (international, 6-digit)

2933.99

EU CN code (8-digit)

2933 99 80

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

7-chloro-5-(2-chlorophenyl)-4-hydroxy-3H-1,4-benzodiazepin-2-one

InChIKey

HIJLVSVTJNDDHT-UHFFFAOYSA-N

SMILES

C1C(=O)N=C2C=CC(=CC2=C(N1O)C3=CC=CC=C3Cl)Cl

Synonyms (13)
  • 7-Chloro-5-(2-chlorophenyl)-1,3-dihydro-2H-1,4-benzodiazepin-2-one 4-Oxide; Lorazepam Imp. C (EP); Lorazepam Impurity C
  • Lorazepam EP Impurity C
  • Delorazepam 4-Oxide
  • LORAZEPAM IMPURITY C

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