Lorazepam – Ativan – CAS 846-49-1

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Lorazepam – Ativan – CAS 846-49-1


Lorazepam is used in the short-term management of severe anxiety. It is fast acting, and useful in treating fast onset panic anxiety. is a benzodiazepine medication. Lorazepam can effectively reduce agitation and induce sleep, and the duration of effects from a single dose makes it an appropriate choice for the short-term treatment of insomnia, especially in the presence of severe anxiety or night terrors. It has a fairly short duration of action.



Product reference number LOR-1638-FB
Full chemical name 7-chloro-5-(2-chlorophenyl)-3-hydroxy-1,3-dihydro-1,4-benzodiazepin-2-one
Formula C15H10Cl2N2O2
Molecular weight 321.16 g·mol−1
CAS Number 846-49-1
Appearance white to off-white crystalline powder
IR IR corresponds
NMR corresponds to structure
MS MH+ corresponds
UV max [nm] (mol, solvent) 229.0 ± 1.0 nm (11000 ± 1000, methanol)
Melting point [Celsius] 70 ± 3
HPLC purity [%]  > 98.5
Water content [%] < 1
Isotopic enrichement [%] D0/D5 < 1

Lorazepam is a benzodiazepine with anxiolytic, anti-anxiety, anticonvulsant, anti-emetic and sedative properties. Lorazepam is an orally available benzodiazepine used widely in the therapy of anxiety and insomnia. This product is intended for research and forensic applications.

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