Azathioprine Impurity 24 CAS CATO-C4X-146324
| CAS No. | CATO-C4X-146324 |
| Molecular Formula | C5H3N5OS |
| Molecular Weight | 181.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Azathioprine Impurity 24.
Azathioprine Impurity 24 (CAS CATO-C4X-146324) is a certified pharmaceutical impurity reference standard with the molecular formula C5H3N5OS and a molecular weight of 181.18 g/mol.
Structurally, Azathioprine Impurity 24 (C5H3N5OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 181.18 g/mol, it falls into the medium-molecular-weight range. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H3N5OS |
| Molecular Weight | 181.18 g/mol |
| Purity | 97%+ |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Azathioprine Standards
- Azathioprine Impurity 13 (CAS 873-25-6)
- Azathioprine Impurity 26 (CAS 18753-82-7)
- Azathioprine Impurity 6 (CAS 154-42-7)
- Azathioprine Impurity 8 (CAS 50-66-8)
- Azathioprine EP Impurity C (CAS 4897-25-0)
- Azathioprine EP Impurity D (CAS 6339-54-4)
- Azathioprine Impurity 9 (CAS 1190008-04-8)
- Azathioprine EP Impurity B (CAS 157930-13-7)
Recommended Standards
- rel-(3R,4R)-4-(2,2-Difluoroethoxy)-1-methylpyrrolidin-3-ol (CAS 2368911-04-8)
- Methyl 6-(2-hydroxyethyl)nicotinate (CAS 1000506-99-9)
- N-Benzoylglycine-2,2-d2 (CAS 208928-78-3)
- 2-(6-Methoxy-2-methylpyridin-3-yl)acetic acid (CAS 1000507-39-0)
- Gimeracil Impurity 8 (CAS CATO-C4X-12148)
- Urapidil Impurity 74 (CAS CATO-C4X-192474)
- Fluconazole Impurity 68 (CAS CATO-C4X-101968)
- (3-(Morpholinosulfonyl)benzoyl)valine (CAS 1397002-40-2)
- 2,5-Diethoxy-4-[(4-methylphenyl)thio]-benzenediazoniumtetrachlorozincate (CAS 38656-51-8)
- N1,N1,N6,N6-tetrabutylhexane-1,6-diamine (CAS 27090-63-7)
- 3-Acetyl-5-chlorobenzonitrile (CAS 1393581-95-7)
- 2-Methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isonicotinaldehyde (CAS 1356962-10-1)
- 5-Chloro-3,8-dimethylquinolin-2-amine (CAS 948292-67-9)
- Semaglutide impurity 59 (CAS CATO-C4X-222659)
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