Temazepam EP Impurity D CAS 17191-70-7
| CAS No. | 17191-70-7 |
| Molecular Formula | C17H15ClN2O2 |
| Molecular Weight | 314.77 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Temazepam EP Impurity D.
Temazepam EP Impurity D (CAS 17191-70-7) is a high-purity analytical reference standard with the molecular formula C17H15ClN2O2 and a molecular weight of 314.77 g/mol.
Temazepam EP Impurity D (C17H15ClN2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Temazepam EP Impurity D meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C17H15ClN2O2 |
| Molecular Weight | 314.77 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Temazepam Standards
- Temazepam impurity G CRS (CAS 93329-92-1)
- Temazepam-D5 (CAS 136765-51-0)
- Temazepam-13C,d3 (CAS 1189871-79-1)
- Temazepam Impurity 8 (CAS 17311-35-2)
- Temazepam EP Impurity E (CAS 2888-64-4)
- Temazepam Related Compound F (15 mg) (7-chloro-1-methyl-5-phenyl-4,5-dihydro-1H-1,4-benzodiazepine-2,3-dione) (CAS 3294-96-0)
- Temazepam EP Impurity C (CAS 18818-64-9)
- Temazepam Glucuronide (CAS 3703-53-5)
Recommended Standards
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- 2-Chloro-6-phenoxybenzonitrile (CAS 91692-70-5)
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