Azathioprine Impurity 19 CAS 304441-05-2
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 304441-05-2 |
| Molecular Formula | C11H9N7O3S |
| Molecular Weight | 319.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Azathioprine Impurity 19 (CAS 304441-05-2) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C11H9N7O3S. Molecular weight: 319.30 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C11H9N7O3S |
| Molecular Weight | 319.30 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 7 |
| Sulfur Atoms | 1 |
Related Azathioprine Standards
- Azathioprine Impurity 25 (CAS CATO-C4X-146325)
- Azathioprine Impurity 14 (CAS 49808-20-0)
- Azathioprine EP Impurity G (Thiamiprine) (CAS 5581-52-2)
- Azathioprine Impurity 18 (CAS 304441-06-3)
- Azathioprine Impurity 20 (CAS 302840-04-6)
- Azathioprine Impurity 17 (CAS CATO-C4X-146317)
- Azathioprine-13C4 (CAS 1346600-71-2)
- Azathioprine-d3 (CAS 446-86-6 (Unlabeled))
Recommended Standards
- ethyl 4-methyl-2-[3-methyl-5-(trifluoromethyl)-1H-pyrazol-1-yl]-1,3-thiazole-5-carboxylate (CAS 956393-95-6)
- Ethyl 4-(5-(furan-2-yl)isoxazole-3-carbonyl)piperazine-1-carboxylate (CAS 1015665-65-2)
- 2-({[4-(trifluoromethyl)phenyl]methyl}sulfanyl)pyridine-3,5-dicarbonitrile (CAS 321430-63-1)
- Lenvatinib Impurity 121 (CAS CATO-C4X-1140122)
- Nebivolol Impurity 5（RR,RR） (CAS 119365-29-6)
- 5,5-Dimethyl-5,10-dihydrobenzo[b][1,8]naphthyridine (CAS 90903-64-3)
- 7-(Pyridin-3-yloxy)octahydropyrrolo[1,2-a]pyrazine (CAS 1422060-52-3)
- 8-((1-Methyl-1H-pyrazol-4-yl)sulfonyl)-1-oxa-4-thia-8-azaspiro[4.5]decane (CAS 1797617-46-9)
- 3-(3,5-Dimethoxyphenyl)-3-hydroxypropanoic acid (CAS 1226234-18-9)
- Pancreatic Polypeptide (1-17)-(Ala31,Aib32)-Neuropeptide Y (18-36) (human) trifluoroacetate salt (CAS 313988-70-4)
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