Allopurinol impurity 28 CAS CATO-C4X-145828
| CAS No. | CATO-C4X-145828 |
| Molecular Formula | C19H30N6O3 |
| Molecular Weight | 390.48 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 Allopurinol impurity 28.
Allopurinol impurity 28 (CAS CATO-C4X-145828) is a certified pharmaceutical impurity reference standard with the molecular formula C19H30N6O3 and a molecular weight of 390.48 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Allopurinol impurity 28 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 390.48 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), Allopurinol impurity 28 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 | C19H30N6O3 |
| Molecular Weight | 390.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Nitrogen Atoms | 6 |
Related Allopurinol Standards
- Allopurinol Impurity 32 (CAS 52632-17-4)
- 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)
Recommended Standards
- Ibrutinib Impurity 35 (CAS CATO-C4X-106435)
- Ruxolitinib Impurity 239 (CAS CATO-C4X-2058239)
- CAS 61278-80-6 (CAS 61278-80-6)
- Niraparib Impurity 51 (CAS CATO-C4X-232951)
- Montelukast Impurity 44 (CAS 2365398-66-7)
- Moxifloxacin Impurity 13 (CAS 1620445-13-7)
- Phytomenadione/Vitamin K1 Impurity 135 (CAS CATO-C4X-2207135)
- N-(2-(Thiophene-2-carbonyl)hydrazine-1-carbonothioyl)benzamide (CAS 448929-00-8)
- Ethyl 6-(bromomethyl)-4-(2-chloro-4-fluorophenyl)-2-(thiazol-2-yl)-1,4-dihydropyrimidine-5-carboxylate (CAS 1092953-02-0)
- 4-(2-Methyl-1,3-dioxolan-2-yl)benzonitrile (CAS 14517-91-0)
- 2-(2-(Azepan-1-yl)-4-(3-chloro-4-methoxyphenyl)thiazol-5-yl)acetic acid (CAS 1443289-99-3)
- 6-Bromo-3-chloroquinolin-4-ol (CAS 857762-32-4)
- Butyl 4-(3-oxo-2,3-dihydro-1H-indazol-1-yl)benzoate (CAS 20943-48-0)
- Semaglutide impurity 75 (CAS CATO-C4X-222675)
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