Isosorbide Dinitrate Impurity 5 CAS 13042-39-2
| CAS No. | 13042-39-2 |
| Molecular Formula | C8H12O5 |
| Molecular Weight | 188.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Isosorbide Dinitrate Impurity 5 (C8H12O5) contains a carboxylic acid 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).
Isosorbide Dinitrate Impurity 5 (CAS 13042-39-2) is a certified pharmaceutical impurity reference standard with the molecular formula C8H12O5 and a molecular weight of 188.18 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), Isosorbide Dinitrate Impurity 5 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 | C8H12O5 |
| Molecular Weight | 188.18 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1960 |
Related Isosorbide Standards
- Isosorbide Dinitrate Impurity 6 (CAS 65940-93-4)
- Isosorbide Dinitrate Impurity 10 (CAS CATO-C4X-223810)
- Isosorbide Dinitrate Impurity 11 (CAS 110627-22-0)
- Isosorbide Impurity 22 (CAS 110627-23-1)
- Isosorbide Dinitrate, Diluted EP Impurity C (CAS 16051-77-7)
- Isosorbide Dinitrate Impurity 18 (Diluted with Lactose) (CAS 16908-90-0)
- Isosorbide Dinitrate EP Impurity B (CAS 16106-20-0)
- Isosorbide Dinitrate Impurity 28 (CAS CATO-C4X-223828)
Recommended Standards
- Vitamin K1 Impurity 5 (CAS 483-55-6)
- Vitamin K1 Impurity 30 (CAS 15448-59-6)
- Arginine Impurity 17 (CAS 151512-14-0)
- 5-Benzylidenehydantoin (CAS CATO-C4X-214624)
- Bedaquiline Impurity 65 (Mixture of Enantiomers) (CAS CATO-C4X-116765)
- Tadalafil Impurity 99 (CAS 114152-23-7)
- Fluvastatin EP Impurity A (Calcium Salt) (CAS CATO-C4X-16518)
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