Vitamin A Impurity 16 CAS CATO-C4X-218716
| CAS No. | CATO-C4X-218716 |
| Molecular Formula | C22H32O2 |
| Molecular Weight | 328.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Vitamin A Impurity 16 (C22H32O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 328.49 g/mol, it falls into the moderately-high-molecular-weight range. 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).
Vitamin A Impurity 16 (CAS CATO-C4X-218716) is a certified pharmaceutical impurity reference standard with the molecular formula C22H32O2 and a molecular weight of 328.49 g/mol.
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), Vitamin A Impurity 16 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 | C22H32O2 |
| Molecular Weight | 328.49 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; 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 19 (CAS 29443-87-6)
- Vitamin A Acetate (CAS 127-47-9)
- Vitamin K1 Impurity 21 (CAS 562836-92-4)
- Vitamin K1 Impurity 54 (CAS CATO-C4X-220754)
- Vitamin A-d5 Acetate (CAS 1217219-62-9)
- Vitamin K1 Impurity 19 (CAS 2580987-82-0)
- Vitamin K1 Impurity 20 (CAS CATO-C4X-220720)
- Vitamin K1 Impurity 60 (CAS 2580987-83-1)
Recommended Standards
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- Tretinoin Impurity 12 (CAS 3899-20-5)
- Ketoprofen Impurity 53 (CAS 1420774-68-0)
- Atrasentan Impurity 46 (CAS 1059043-91-2)
- Relugolix Impurity 118 (CAS 308831-93-8)
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