Terazosin EP Impurity B CAS 1177261-73-2
| CAS No. | 1177261-73-2 |
| Molecular Formula | C19H24N4O5 |
| Molecular Weight | 388.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 388.42 g/mol gives Terazosin EP Impurity B distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Terazosin EP Impurity B (CAS 1177261-73-2) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N4O5 and a molecular weight of 388.42 g/mol.
The molecular framework of Terazosin EP Impurity B (C19H24N4O5) is characterized by a flavonoid core, 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Terazosin EP Impurity B under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H24N4O5 |
| Molecular Weight | 388.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 4 |
Related Terazosin Standards
- (R)-Terazosin (CAS 109351-34-0)
- Terazosin EP Impurity J (CAS 152551-75-2)
- Terazosin Impurity 23 (CAS 1260939-66-9)
- Terazosin EP Impurity F (CAS 109678-71-9)
- Terazosin EP Impurity K (CAS 19216-56-9)
- Terazosin-d8 (CAS 1006718-20-2)
- Terazosin EP Impurity I (CAS 1177261-85-6)
- Terazosin EP Impurity H HCl (CAS 111013-28-6)
Recommended Standards
- Atorvastatin Impurity 111 (CAS 175453-07-3)
- Irbesartan Impurity 10 (CAS 1312996-19-2)
- Istradefylline impurity 30 (CAS CATO-C4X-106130)
- Ozagrel Impurity 20 (CAS CATO-C4X-197120)
- Salbutamol EP impurity N (CAS 149222-15-1)
- Budesonide Impurity 53 (CAS CATO-C4X-138953)
- Imrecoxib Impurity 23 (CAS CATO-C4X-237923)
- (4-Cyanophenyl)phosphonic acid (CAS 16672-78-9)
- 3-(Prop-2-yn-1-yl)tetrahydrofuran-2-ol (CAS 1321861-62-4)
- 2-Methylquinoline-4,7-diamine (CAS 129333-49-9)
- Methyl 3-cyano-1-methyl-1H-pyrazole-5-carboxylate (CAS 232281-30-0)
- (5-Methoxy-4-methylpyridin-2-yl)methyl acetate (CAS 959617-15-3)
- Methyl 2,4-dichloro-3-methylquinoline-6-carboxylate (CAS 1705612-20-9)
- Des-Ser39-Tirzepatide (CAS CATO-CPTD788936)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com