Altrenogest impurity 16 CAS CATO-C4X-248316
| CAS No. | CATO-C4X-248316 |
| Molecular Formula | C20H24O4 |
| Molecular Weight | 328.40 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 Altrenogest impurity 16.
Altrenogest impurity 16 (CAS CATO-C4X-248316) is a certified pharmaceutical impurity reference standard with the molecular formula C20H24O4 and a molecular weight of 328.40 g/mol.
The molecular framework of Altrenogest impurity 16 (C20H24O4) is characterized by a flavonoid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C20H24O4 |
| Molecular Weight | 328.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Altrenogest Standards
- Altrenogest impurity 13 (CAS CATO-C4X-248313)
- Altrenogest Impurity 5 (CAS CATO-C4X-24835)
- Altrenogest impurity 11 (CAS CATO-C4X-248311)
- Altrenogest impurity 12 (CAS 23760-34-1)
- Altrenogest Impurity 3 (CAS 141299-96-9)
- Altrenogest impurity 9 (CAS CATO-C4X-24839)
- Altrenogest Impurity 7 (CAS CATO-C4X-24837)
- Altrenogest Impurity 1 (CAS CATO-C4X-24831)
Recommended Standards
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