Azathioprine Impurity 11 CAS 4897-21-6
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 4897-21-6 |
| Molecular Formula | C4H5ClN2 |
| Molecular Weight | 116.55 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Azathioprine Impurity 11 (CAS 4897-21-6) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C4H5ClN2. Molecular weight: 116.55 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C4H5ClN2 |
| Molecular Weight | 116.55 g/mol |
| Purity | 97%+ |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Azathioprine Standards
- Azathioprine Impurity 10 (CAS 253453-91-7)
- Azathioprine EP Impurity A (CAS 4531-54-8)
- 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)
Recommended Standards
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- 23785-22-0 4-(chloromethyl)-1H-imidazole 4-Chloromethyl-1H-imidazole A4961 (CAS 23785-22-0)
- 6-Chloro-1-hexyne (CAS 10297-06-0)
- Aprepitant Impurity 36 (CAS 638990-20-2)
- Methazolamide Impurity 1 (CAS CATO-C4X-34041)
- Sodium bis(sulfonatothio)argentate(I) (CAS 16027-55-7)
- (R)-5,5-Dimethyl-3-(pyridin-3-ylsulfonyl)thiazolidine-4-carboxylic acid (CAS 737799-50-7)
- Methyl (5-(2-chloro-4-(trifluoromethyl)phenoxy)-2-methylphenyl)carbamate (CAS 866153-11-9)
- 3-Bromopiperidin-2-one (CAS 34433-86-8)
- Des-Pro36-37-Tirzepatide (CAS CATO-CPTD788938)
Why CATO?
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