Ganciclovir impurity 21 CAS CATO-C4X-102121
| CAS No. | CATO-C4X-102121 |
| Molecular Formula | C8H8ClN7O |
| Molecular Weight | 253.65 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 Ganciclovir impurity 21.
Ganciclovir impurity 21 (CAS CATO-C4X-102121) is a certified pharmaceutical impurity reference standard with the molecular formula C8H8ClN7O and a molecular weight of 253.65 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Ganciclovir impurity 21 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 253.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Ganciclovir impurity 21 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 | C8H8ClN7O |
| Molecular Weight | 253.65 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 7 |
Related Ganciclovir Standards
- Ganciclovir EP Impurity E (CAS 86357-09-7)
- Ganciclovir EP Impurity H (CAS 84222-50-4)
- Ganciclovir (CAS 82410-32-0)
- Ganciclovir EP Impurity A (CAS 1797982-93-4)
- Ganciclovir Impurity 36 (CAS 86357-10-0)
- Ganciclovir-d5 (CAS 1189966-73-1)
- Ganciclovir EP Impurity C (CAS 108436-36-8)
- Ganciclovir Impurity 24 (CAS 86761-37-7)
Recommended Standards
- 4-Chloro-1,2-dihydro-2-oxo-8-(trifluoromethyl)quinoline 4-chloro-8-(trifluoromethyl)-1H-quinolin-2-one 955288-52-5 (CAS 955288-52-5)
- Imidacloprid-olefin (CAS 115086-54-9)
- N1-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]propane-1,3-diamine (CAS 465514-63-0)
- Methyl 3-chloro-1-methyl-5-sulfamoyl-1H-pyrazole-4-carboxylate (CAS 100784-27-8)
- Flupentixol Impurity 45 (CAS CATO-C4X-189545)
- Cenobamate Impurity 60 (CAS CATO-C4X-241660)
- Oseltamivir Impurity 26 (CAS CATO-C4X-172026)
- Ethyl 4-cyclopropylbenzoate (CAS 35391-85-6)
- Azilsartan Impurity 175 (CAS CATO-C4X-1096175)
- 3-(2-Chloro-acetylamino)-piperidine-1-carboxylic acid benzyl ester (CAS 1353957-99-9)
- 6-(Sec-butoxy)-5-methylpyridin-3-amine (CAS 1247912-28-2)
- 6-(Methylamino)-5-nitropyridine-3-carboxylic acid (CAS 1218943-22-6)
- 2-[2-(bromomethyl)phenyl]-5,5-dimethyl-1,3,2-dioxaborinane (CAS 166821-88-1)
- Semaglutide Impurity 246 (CAS CATO-C4X-2226246)
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