Desmethyldiazepam-d5
Desmethyldiazepam-d5 (CAS: 65891-80-7) is a deuterated analogue of desmethyldiazepam, with the chemical formula C15H6D5N2ClO and a molecular weight of 275.74 g/mol. This compound serves as a valuable analytical standard, particularly in chromatographic applications and research involving benzodiazepine analogues and their metabolites. Its isotopic purity of 98 atom % D ensures reliable performance in quantitative analysis.
- IUPAC
- 7-Chloro-1,3-dihydro-5-(phenyl-d5)-2H-1,4-benzodiazepin-2-one

Analytical Standards
Utilised as a certified reference material for the identification and quantification of benzodiazepines and their metabolites in various biological and forensic samples. Its deuterated nature makes it ideal for use as an internal standard in mass spectrometry.
Chromatographic Analysis
Applied in HPLC and GC-MS methods for drug testing, pharmaceutical quality control, and research. It aids in the precise separation and detection of closely related compounds.
Pharmacological Research
Investigated in studies related to drug metabolism and pharmacokinetics, aiding researchers in understanding the metabolic pathways and disposition of benzodiazepine-class compounds.
| Molecular weight | 275.74 |
|---|---|
| Linear formula | C15H6D5N2ClO |

Hazard statements
- H302Harmful if swallowed
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
| Safety statements (S) | 36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Drug Control | USDEA Schedule IV; Home Office Schedule 4.1; psychotrope; kontrollierte Droge in Deutschland; regulated under CDSA - not available from Canada |
|---|---|
| Gene Information | rat ... Tspo(24230) |
| Isotopic Purity | 98 atom % D |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Desmethyldiazepam-d5 used for?
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Desmethyldiazepam-d5 is primarily used as an analytical standard in chromatography and mass spectrometry for the identification and quantification of benzodiazepines and their metabolites. It is also employed in pharmacological research.
What is the CAS number and molecular formula for Desmethyldiazepam-d5?
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The CAS number is 65891-80-7, and the molecular formula is C15H6D5N2ClO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Desmethyldiazepam-d5 with an isotopic purity of 98 atom % D. This product is intended for research and analytical purposes and is not supplied as USP, BP, EP, or pharmacopoeia grade.
What are the safety precautions for handling Desmethyldiazepam-d5?
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Desmethyldiazepam-d5 is classified as harmful if swallowed (H302). Handle with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation and avoid dust formation.
Is Desmethyldiazepam-d5 a controlled substance?
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Yes, Desmethyldiazepam-d5 is subject to drug control regulations. It is listed under US DEA Schedule IV, Home Office Schedule 4.1, and is considered a psychotropic and controlled drug in Germany. It is regulated under CDSA but is not available from Canada.
How is Desmethyldiazepam-d5 packed and shipped?
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Tech Serve Solutions packs and exports Desmethyldiazepam-d5 adhering to all relevant regulations for chemical substances, ensuring safe and compliant delivery worldwide.
How can I request a quote or sample for Desmethyldiazepam-d5?
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To request a quote or a sample of Desmethyldiazepam-d5, please contact our sales team through the website or by phone, providing your specific requirements.
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