Allopurinol impurity 20 CAS CATO-C4X-145820
| CAS No. | CATO-C4X-145820 |
| Molecular Formula | C9H12N2O3 |
| Molecular Weight | 196.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Allopurinol impurity 20 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Allopurinol impurity 20 (CAS CATO-C4X-145820) is a certified pharmaceutical impurity reference standard with the molecular formula C9H12N2O3 and a molecular weight of 196.20 g/mol.
Based on its molecular formula C9H12N2O3, Allopurinol impurity 20 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 196.20 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures Allopurinol impurity 20 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H12N2O3 |
| Molecular Weight | 196.20 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, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Allopurinol Standards
- Allopurinol impurity 16 (CAS CATO-C4X-145816)
- Allopurinol impurity 11 (CAS CATO-C4X-145811)
- Allopurinol impurity 23 (CAS CATO-C4X-145823)
- Allopurinol EP Impurity E (CAS 31055-19-3)
- Allopurinol impurity 22 (CAS CATO-C4X-145822)
- Allopurinol impurity 21 (CAS CATO-C4X-145821)
- Allopurinol impurity 29 (CAS CATO-C4X-145829)
- Allopurinol EP Impurity C (CAS 1346604-13-4)
Recommended Standards
- Desloratadine Impurity 83 (CAS 26699-73-0)
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- Buspirone Impurity 42 (CAS CATO-C4X-125842)
- Trimetazidine Dihydrochloride EP Impurity C (CAS 2103-57-3)
- Cefdinir Impurity 33 (CAS CATO-C4X-121033)
- Mianserin Impurity 103 (CAS 745757-89-5)
- Celecoxib Impurity 57 (CAS CATO-C4X-104357)
- Methyl 4-((ethylamino)methyl)cyclohexane-1-carboxylate hydrochloride (CAS 2137536-43-5)
- 4,4'-(Pyridine-2,5-diyl)dibenzaldehyde (CAS 2226224-90-2)
- (6R,7R,8R,9R)-8-Hydroxy-7-methoxy-7,8,9,10-tetrahydro-6,9-epoxypyrimido[2,1-b][1,3]oxazocin-2(6H)-one (CAS 175471-64-4)
- 6-Chloro-2,2-dimethyl-7-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 136545-08-9)
- 1-(2,4,5-Trichlorophenyl)-2,5-dihydro-1H-pyrrole-2,5-dione (CAS 31489-22-2)
- Methyl 4-chloro-6-methoxynicotinate (CAS 848953-45-7)
- Semaglutide impurity 37 (CAS CATO-C4X-222637)
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