Allopurinol Impurity 32 CAS 52632-17-4
| CAS No. | 52632-17-4 |
| Molecular Formula | C12H14N4O4 |
| Molecular Weight | 278.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Allopurinol Impurity 32 (CAS 52632-17-4), a pharmacopoeial impurity reference standard (molecular formula C12H14N4O4, MW 278.26 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Allopurinol Impurity 32 (C12H14N4O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 278.26 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).
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.
As a certified reference material (CRM), Allopurinol Impurity 32 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 | C12H14N4O4 |
| Molecular Weight | 278.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 4 |
Related Allopurinol Standards
- Allopurinol Impurity 7 (CAS 321571-07-7)
- Allopurinol Riboside (CAS 16220-07-8)
- Allopurinol Impurity 12 (CAS 52632-26-5)
- Allopurinol impurity 13 (CAS CATO-C4X-145813)
- Allopurinol impurity 21 (CAS CATO-C4X-145821)
- Allopurinol impurity 11 (CAS CATO-C4X-145811)
- Allopurinol impurity 23 (CAS CATO-C4X-145823)
- Allopurinol impurity 20 (CAS CATO-C4X-145820)
Recommended Standards
- Isavuconazole Impurity 34 (CAS 2001052-01-1)
- Isavuconazole Impurity 2 (CAS 2001051-99-4)
- Lenalidomide Impurity 3 (CAS 295357-66-3)
- Isavuconazole Impurity 158 (CAS CATO-C4X-1236158)
- Lumateperone impurity 25 (CAS CATO-C4X-220125)
- Fluralaner Impurity 53 (CAS CATO-C4X-218053)
- Ampicillin Impurity 84 (CAS CATO-C4X-144384)
- 5-(Trifluoromethyl)-2,3-dihydro-1-benzofuran-3-amine (CAS 1243205-10-8)
- (S)-1-(3-Chloro-2-fluorophenyl)ethanamine hydrochloride (CAS 1313593-59-7)
- 4-(3-Chlorophenyl)-1H-imidazole (CAS 912763-45-2)
- Isojacareubin (CAS 50597-93-8)
- 3-(2-Chlorophenyl)-1-methyl-5-phenyl-4-propoxy-1H-pyrazole (CAS 60627-69-2)
- [1-(difluoromethyl)-1h-pyrazol-4-yl]methanamine (CAS 1365942-99-9)
- Endo-Ala35-Tirzepatide (CAS CATO-CPTD788687)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com