Azathioprine EP Impurity B Monohydrate CAS 6112-76-1
| CAS No. | 6112-76-1 |
| Molecular Formula | C5H4N4S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Azathioprine EP Impurity B Monohydrate (CAS 6112-76-1), a pharmacopoeial impurity reference standard (molecular formula C5H4N4SH2O, MW 170.19 g/mol) used for the identification and quantification of trace impurities in APIs.
Azathioprine EP Impurity B Monohydrate (C5H4N4SH2O) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), Azathioprine EP Impurity B Monohydrate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H4N4S H2O |
| Molecular Weight | 170.19 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Azathioprine Standards
- Azathioprine Impurity 9 (CAS 1190008-04-8)
- Azathioprine Impurity 12 (CAS 1192-53-6)
- Azathioprine-13C4 (CAS 1346600-71-2)
- Azathioprine Impurity 6 (CAS 154-42-7)
- Azathioprine EP Impurity B (CAS 157930-13-7)
- Azathioprine Impurity 26 (CAS 18753-82-7)
- Azathioprine Impurity 10 (CAS 253453-91-7)
- Azathioprine Impurity 20 (CAS 302840-04-6)
Recommended Standards
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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
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com