Structural, chemical and analytical data on controlled substances. The single reference site for forensic drug chemists. Click to login as forendex superuser Southern Association of Forensic Scientitsts
Search for a substance: Help
CSA Names: Lorazepam
CSA Location: Schedule IV Section (c) Subsection (30) DEA code 2885
CSA History: 42 FR 54546 added effective 3 Oct 1977
Names: 7-Chloro-5-(2-chlorophenyl)-3-hydroxy-1,3-dihydro-2H-1,4-benzodiazepin-2-one (IUPAC)
Molecular formula: C15H10Cl2N2O2
Nominal mass: 320
Average mass: 321.1581
Monoisotopic mass: 320.011933
CAS registry number: 846-49-1
ChemSpider: 3821
PubChem: 3958
Wikipedia: Lorazepam
Erowid: Lorazepam
Drugs-Forum: Lorazepam
Bluelight: Lorazepam
Standard InChI: InChI=1S/C15H10Cl2N2O2/c16-8-5-6-12-10(7-8)13(19-15(21)14(20)18-12)9-3-1-2-4-11(9)17/h1-7,15,21H,(H,18,20)
SMILES: Clc1ccc2c(c1)C(=NC(C(=O)N2)O)c1ccccc1Cl
Property Value Remarks
Property Value Remarks
Location Type Remarks
lorazepam ms.pdf EI MS Agilent MSD
Lorazepam MS (NIST).pdf EI MS Used with the permission of NIST Mass Spectrometry Data Center Collection (C) 2008 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.
Lorazepam.bmp GC IRD Used with Permission of Oklahoma State Bureau of Investigation, Forensic Science Center, Controlled Substances Laboratory.
Lorazepam.pdf RAMAN Thermo Scientific SmartRaman DXR (Kentucky State Police)
Lorazepam edit.pdf SP-GC-IR DiscovIR
Lorazepam CND.pdf UV FTIR EI MS Used with permission of CND Analytical. From "Analytical Profiles of the Benzodiazepines."
Vendor ID URL
Cerilliant L-901
Grace Davison (Alltech) 01358
LGC MM0071.00
Lipomed LOR-142§ion=mediadir&cmd=detail
Spectrum L1225
Tocris Bioscience 3087
Toronto Research Chemicals L469856
Toronto Research Chemicals L469850
Toronto Research Chemicals L469855
U.S. Pharmacopeia 1370305
Title Publication Date Vol. Iss. Page(s) Remarks
Effect of Temperature on Enantiomer Separation of Oxzepam and Lorazepam by High-Performance Liquid Chromatography on a β-Cyclodextrin Derivatized Bonded Chiral Stationary Phase J. Chrom. Sci. 2004-02-01 Vol 42 (2) Hua He et al
Separation of Benzodiazepines Using Capillary Electrochromatography J. Chrom. Sci. 2004-05-01 Vol 42 (5) Constantina P. Kapnissi and Isiah M. Warner
Substance name
Substance name
Please send us your comments, questions or suggestions · Collaborate with colleagues at Forendex Forum
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License Updated 3 March 2017