Terazosin Impurity 28 CAS CATO-C4X-134928
| CAS No. | CATO-C4X-134928 |
| Molecular Formula | C9H16N2O2 |
| 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 Impurity 28.
CATO supplies Terazosin Impurity 28 (CAS CATO-C4X-134928), a pharmacopoeial impurity reference standard (molecular formula C9H16N2O2HCl, MW 220.70 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, Terazosin Impurity 28 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 220.70 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C9H16N2O2 HCl |
| Molecular Weight | 220.70 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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
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- (2S,3R)-2-Methyl-3-(p-tolyl)oxirane (CAS 59168-87-5)
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- N-(Acridin-9-yl)-N-methylacetamide (CAS 61299-62-5)
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- ([D2]Gly4)-Cholecystokinin Octapeptide (sulfated) ammonium salt (CAS 1926163-74-7)
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