Urapidil Impurity 33 CAS 39615-79-7
| CAS No. | 39615-79-7 |
| Molecular Formula | C6H9N3O2 |
| Molecular Weight | 155.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Urapidil Impurity 33 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.
Urapidil Impurity 33 (CAS 39615-79-7) is a certified pharmaceutical impurity reference standard with the molecular formula C6H9N3O2 and a molecular weight of 155.15 g/mol.
The molecular framework of Urapidil Impurity 33 (C6H9N3O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C6H9N3O2 |
| Molecular Weight | 155.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 3 |
Related Urapidil Standards
- Urapidil Impurity 25 (CAS 63959-47-7)
- Urapidil Impurity N62 (CAS 41949-07-9)
- Urapidil Impurity 108 (CAS CATO-C4X-1924108)
- Urapidil Impurity 6 (CAS 769-42-6)
- Urapidil Impurity 27 (CAS 31737-09-4)
- Urapidil Impurity 40 (CAS 6328-48-9)
- Urapidil Impurity 75 (CAS 116315-12-9)
- Urapidil Impurity 63 (CAS CATO-C4X-192463)
Recommended Standards
- 2-Amino-4,6-Dimethoxypyrimidine (CAS 36315-01-2)
- Minoxidil Impurity 14 (CAS CATO-C4X-170014)
- L-Histidine (CAS 71-00-1)
- Leflunomide Impurity 19 (CAS 51135-73-0)
- Esomeprazole Impurity 103 (CAS CATO-C4X-1112103)
- Indapamide Impurity 46 (CAS CATO-C4X-140046)
- Benorilate Impurity 1 (CAS 5003-49-6)
- 6-Chloro-4-oxo-4H-chromene-3-carboxylic acid (CAS 51085-92-8)
- N-Isopropyl-3-(piperazin-1-yl)propanamide (CAS 89009-61-0)
- Tert-butyl 2-(((4-aminobenzoyl)oxy)methyl)pyrrolidine-1-carboxylate (CAS 1235439-65-2)
- 2-(6-fluoro-1-methyl-1H-indol-3-yl)acetonitrile (CAS 1368450-32-1)
- 2-((2-Hydroxyethyl)(methyl)amino)ethyl hydrogen phenylboronate (CAS 65796-77-2)
- 2-((2-((2,3-Dimethylphenyl)amino)-2-oxoethyl)thio)acetic acid (CAS 412922-07-7)
- Insulin Degludec Impurity 9 (CAS CATO-C4X-21579)
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