Vitamin A Impurity 28 CAS CATO-C4X-218728
| CAS No. | CATO-C4X-218728 |
| Molecular Formula | C20H28 |
| Molecular Weight | 268.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Vitamin A Impurity 28 is closely related to a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Vitamin A Impurity 28 (CAS CATO-C4X-218728, C20H28) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C20H28, Vitamin A Impurity 28 contains a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 268.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), Vitamin A 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 | C20H28 |
| Molecular Weight | 268.44 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Vitamin Standards
- Vitamin A Impurity B(Mixture of E/Z Isomers) (CAS CATO-C1305354)
- Vitamin A Impurity 24 (CAS 1224-78-8)
- Vitamin A impurity 5(Mixture of E/Z Isomers) (CAS CATO-C4X-25505-SS)
- Vitamin K1 Impurity 49 (CAS 3689-69-8)
- Vitamin K2 Impurity 13 (CAS 587888-42-4)
- Vitamin K1 Impurity 41 (CAS 1778736-16-5)
- Vitamin K1 Impurity 42 (CAS 326475-12-1)
- Vitamin K1 Impurity 59 (CAS CATO-C4X-220759)
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