Tenofovir disoproxil Impurity 19 CAS 4121-39-5
| CAS No. | 4121-39-5 |
| Molecular Formula | C8H9N5 |
| Molecular Weight | 175.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Tenofovir disoproxil Impurity 19 (C8H9N5) contains a nitrogen-containing heterocyclic scaffold, a nitrile group. Its physicochemical properties are representative of its class; 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).
Tenofovir disoproxil Impurity 19 (CAS 4121-39-5) is a certified pharmaceutical impurity reference standard with the molecular formula C8H9N5 and a molecular weight of 175.19 g/mol.
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), Tenofovir disoproxil Impurity 19 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 | C8H9N5 |
| Molecular Weight | 175.19 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 |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 5 |
Related Tenofovir Standards
- Tenofovir Impurity C13 (CAS 1464851-21-5)
- Tenofovir Disoproxil USP Related Compound B (CAS 1446486-33-4)
- Tenofovir disoproxil Impurity 85 (CAS 707-99-3)
- Tenofovir disoproxil Impurity 58 (CAS 1611-31-0)
- Tenofovir disoproxil Impurity 90 (CAS 3084-40-0)
- Tenofovir Impurity 144 (CAS 2715-68-6)
- Tenofovir alafenamide impurity N1 (CAS 16958-60-4)
- Tenofovir Impurity 110 (CAS 20776-34-5)
Recommended Standards
- L-Citrulline (CAS 372-75-8)
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- Momelotinib impurity 15 (CAS CATO-C4X-337715)
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- 6-Amino-1-methyl-4-thioxo-3,4-dihydro-1,3,5-triazin-2(1H)-one (CAS 77420-23-6)
- Cinametic Acid (CAS 35703-32-3)
- (2-Chloro-4-fluoropyridin-3-yl)methanol (CAS 1805639-41-1)
- 6-(Prop-2-yn-1-ylamino)pyrimidin-2(1H)-one (CAS 193275-31-9)
- 20694-39-7 03M0G68R5F Manganese nitrate tetrahydrate UNII-03M0G68R5F Manganese dinitrate tetrahydrate Manganese(II) nitrate tetrahydrate Nitric acid, manganese(2+) salt, tetrahydrate (CAS 20694-39-7)
- Tirzepatide Impurity 14 (CAS CATO-C4X-324014)
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