Azelastine Impurity 21 CAS 57676-51-4
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 57676-51-4 |
| Molecular Formula | C8H9ClN2O |
| Molecular Weight | 184.62 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Azelastine Impurity 21 (CAS 57676-51-4) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C8H9ClN2O. Molecular weight: 184.62 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C8H9ClN2O |
| Molecular Weight | 184.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Azelastine Standards
- Azelastine Impurity 18 (CAS CATO-C4X-139618)
- Azelastine Impurity 71 (CAS CATO-C4X-139671)
- Azelastine Impurity 29 (CAS 174826-63-2)
- Azelastine Impurity 69 (CAS CATO-C4X-139669)
- Azelastine impurity 55 (CAS CATO-C4X-139655)
- Azelastine impurity 57 (CAS CATO-C4X-139657)
- Azelastine Impurity 12 (CAS 1878-65-5)
- Azelastine Impurity 34 (CAS 1878-66-6)
Recommended Standards
- Roxatidine Impurity 49 (CAS 4530-44-3)
- Ketoprofen Impurity 43 (CAS 34040-63-6)
- Bupropion USP Related Compound F (CAS 857233-13-7)
- Tiaprofenic Acid Impurity 1 (CAS 78239-47-1)
- Finerenone Impurity 67 (CAS CATO-C4X-288067)
- 7-Chloro-2-(3,4-dimethylphenyl)-8-methylquinoline-4-carbonyl chloride (CAS 1160256-40-5)
- (S)-4-Methyl-8,8a-dihydropyrrolo[1,2-d][1,2,4]triazine-1,6(2H,7H)-dione (CAS 183079-02-9)
- 2,4-Dichloro-N-hexylpyrimidine-5-carboxamide (CAS 54127-86-5)
- Carebastine Impurity 4 (CAS 1338066-81-1（freebase）)
- 103244-41-3 Insulin-like Growth Factor-II fragment 33-40 Ser-Arg-Val-Ser-Arg-Arg-Ser-Arg (CAS 103244-41-3)
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 13829788188 / jacky.chen@cato-chem.com