Allopurinol Impurity 7 CAS 321571-07-7
| CAS No. | 321571-07-7 |
| Molecular Formula | C12H14N4O4 |
| Molecular Weight | 278.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Allopurinol Impurity 7 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.
As a process- or degradation-related impurity, Allopurinol Impurity 7 (CAS 321571-07-7, C12H14N4O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Allopurinol Impurity 7 (C12H14N4O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; 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.
CATO manufactures Allopurinol Impurity 7 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 | 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.) | 2025 |
| Nitrogen Atoms | 4 |
Related Allopurinol Standards
- Allopurinol Impurity 32 (CAS 52632-17-4)
- 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
- Lenalidomide Impurity 3 (CAS 295357-66-3)
- Isavuconazole Impurity 34 (CAS 2001052-01-1)
- Imidapril Impurity 7 (CAS 168292-63-5)
- Isavuconazole Impurity 2 (CAS 2001051-99-4)
- Glucosamine sulfate impurity 18 (CAS CATO-C4X-194618)
- Terazosin Hydrochloride Dihydrate EP Impurity O (CAS CATO-C4X-134929)
- Oseltamivir Impurity 96 (CAS CATO-C4X-172096)
- trans-3-amino-2,2-dimethyl-cyclobutanol;hydrochloride (CAS 1434142-03-6)
- 6-(Methylsulfonyl)nicotinonitrile (CAS 66154-68-5)
- Losartan Impurity 20 (CAS 154709-19-0)
- 2-(5-(Furan-2-yl)-3-methylisoxazol-4-yl)acetic acid (CAS 1374407-74-5)
- 25712-16-7 Methyl 3-isocyanatothiophene-2-carboxylatato DTXSID80595661 (CAS 25712-16-7)
- Ethyl 9,9-difluoro-3-azabicyclo[3.3.1]Nonane-1-carboxylate (CAS 1373028-30-8)
- Ginseng Tetrapeptide (CAS 178553-95-2)
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