Allopurinol impurity 12 CAS CATO-C4X-145812
| CAS No. | CATO-C4X-145812 |
| Molecular Formula | C5H7N5O |
| Molecular Weight | 153.14 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Allopurinol impurity 12 (CAS CATO-C4X-145812), a pharmacopoeial impurity reference standard (molecular formula C5H7N5O, MW 153.14 g/mol) used for the identification and quantification of trace impurities in APIs.
Allopurinol impurity 12 (C5H7N5O) contains an amide group, 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C5H7N5O |
| Molecular Weight | 153.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 5 |
Related Allopurinol Standards
- Allopurinol impurity 18 (CAS CATO-C4X-145818)
- Allopurinol EP Impurity B (CAS 22407-20-1)
- Allopurinol impurity 27 (CAS CATO-C4X-145827)
- Allopurinol Impurity 31 (CAS CATO-C4X-145831)
- Allopurinol EP Impurity D (USP RC D) (CAS 1260243-04-6)
- Allopurinol EP Impurity D (CAS 19750-02-8)
- Allopurinol EP Impurity D (CAS 6994-25-8)
- Allopurinol impurity 15 (CAS CATO-C4X-145815)
Recommended Standards
- Aspirin Impurity 25 (CAS 38160-63-3)
- Gadobutrol Impurity 111 (CAS 619-73-8)
- Metronidazole Impurity 26 (CAS 5006-79-1)
- Adenosine Impurity 1 (CAS CATO-C4X-24191)
- Oseltamivir Impurity 285 (CAS CATO-C4X-1720285)
- Aztreonam Impurity 42 (CAS CATO-C4X-152242)
- Prochlorperazine EP Impurity A (CAS 10078-27-0)
- Methyl 2-(3-chloro-4-fluorobenzoyl)benzoate (CAS 1443349-23-2)
- 4-Amino-6-bromo-3-iodo (1H)Indazole (CAS 1000342-70-0)
- 4-Cyclopropoxy-2-methoxynicotinamide (CAS 1243318-82-2)
- (R)-5-Cyclohexylpyrrolidin-2-one (CAS 872358-02-6)
- N-Methylcyclopropanamine hydrochloride (CAS 67376-94-7)
- 1-2-3-4-6-Penta-O-acetyl-α-D-thiogalactopyranose (CAS 130796-15-5)
- Cholecystokinin Octapeptide (1-5) (desulfated) (CAS 121880-96-4)
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 18665070610 / Nicole.chen@cato-chem.com