Terazosin EP Impurity C xHCl CAS 70843-11-7
| CAS No. | 70843-11-7 |
| Molecular Formula | C14H19N5O2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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 Terazosin EP Impurity C xHCl.
As a process- or degradation-related impurity, Terazosin EP Impurity C xHCl (CAS 70843-11-7, C14H19N5O2xHCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Terazosin EP Impurity C xHCl (C14H19N5O2xHCl) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 325.80 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Terazosin EP Impurity C xHCl 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 | C14H19N5O2 xHCl |
| Molecular Weight | 325.80 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Related Terazosin Standards
- Terazosin-d8 (CAS 1006718-20-2)
- Terazosin EP Impurity D (CAS 102714-74-9)
- Terazosin EP Impurity E (CAS 102839-00-9)
- Terazosin EP Impurity G (CAS 105356-89-6)
- Terazosin EP Impurity H (CAS 105356-90-9)
- Terazosin EP Impurity H HCl (CAS 105356-90-9 (free base))
- (R)-Terazosin (CAS 109351-34-0)
- Terazosin EP Impurity F (CAS 109678-71-9)
Recommended Standards
- Clofazimine Impurity 20 (CAS CATO-C4X-207120)
- Moxifloxacin Impurity 33 (CAS 849770-49-6)
- Alectinib Impurity 83 (CAS CATO-C4X-283683)
- 2-(Aminomethyl)bi(cyclopropane)-2-carboxylic acid (CAS 724772-99-0)
- Triphenylantimony diacetate (CAS 1538-62-1)
- 2-Amino-5-(ethylsulfonyl)-4-(m-tolyl)thiophene-3-carbonitrile (CAS 1710833-66-1)
- Carbol fuchsin (CAS 4197-24-4)
- 4-(Difluoromethyl)-5-fluoro-3-iodopyridin-2-amine (CAS 1805113-42-1)
- N-[1-(4-Ethyl-5-sulfanyl-4H-1,2,4-triazol-3-yl)-2-phenylethyl]-4-fluorobenzene-1-sulfonamide (CAS 338953-98-3)
- (Glu9)-Exenatide (2-39) trifluoroacetate salt (CAS 196109-34-9)
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