Azathioprine EP Impurity A CAS 4531-54-8
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 4531-54-8 |
| Molecular Formula | C4H6N4O2 |
| Molecular Weight | 142.12 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Azathioprine EP Impurity A (CAS 4531-54-8), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C4H6N4O2. Molecular weight: 142.12 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C4H6N4O2 |
| Molecular Weight | 142.12 g/mol |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 4 |
Related Azathioprine Standards
- Azathioprine Impurity N4 (CAS 5167-18-0)
- Azathioprine Impurity 12 (CAS 1192-53-6)
- Azathioprine Impurity 21 (CAS 30467-02-8)
- Azathioprine EP Impurity B (CAS 157930-13-7)
- Azathioprine EP Impurity B (CAS 50-44-2)
- Azathioprine Impurity 9 (CAS 1190008-04-8)
- Azathioprine EP Impurity D (CAS 6339-54-4)
- Azathioprine EP Impurity C (CAS 4897-25-0)
Recommended Standards
- methyl 5-amino-1H-1,2,4-triazole-3-carboxylate (CAS 3641-14-3)
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- Atropine Impurity 45 (CAS 2515-36-8)
- Pyridoxin impurity 70 (CAS CATO-C4X-187770)
- rel-(1R,2R,4R,6R)-methyl 4-hydroxybicyclo[4.1.0]heptane-2-carboxylate (CAS 2570824-78-9)
- 4-Phenyl-3,4-dihydro-2H-pyrrol-5-amine (CAS 412283-73-9)
- Biotinyl-Amylin (human) trifluoroacetate salt (CAS 1678415-18-3)
- Tetrabutylammonium bromide xhydrate (CAS 37451-67-5)
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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