Altrenogest impurity 17 CAS 32259-88-4
| CAS No. | 32259-88-4 |
| Molecular Formula | C23H32O3 |
| Molecular Weight | 356.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Altrenogest impurity 17 (CAS 32259-88-4), a pharmacopoeial impurity reference standard (molecular formula C23H32O3, MW 356.50 g/mol) used for the identification and quantification of trace impurities in APIs.
Altrenogest impurity 17 (C23H32O3) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
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 | C23H32O3 |
| Molecular Weight | 356.50 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
Related Altrenogest Standards
- Altrenogest Impurity 6 (CAS CATO-C4X-24836)
- Altrenogest impurity 14 (CAS 165541-64-0)
- Altrenogest impurity 11 (CAS CATO-C4X-248311)
- Altrenogest impurity 16 (CAS CATO-C4X-248316)
- Altrenogest impurity 13 (CAS CATO-C4X-248313)
- Altrenogest Impurity 5 (CAS CATO-C4X-24835)
- Altrenogest impurity 12 (CAS 23760-34-1)
- Altrenogest Impurity 3 (CAS 141299-96-9)
Recommended Standards
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- Vonoprazan Impuirty 128 (CAS 928324-50-9)
- Quinoline-6-sulfonic acid (CAS 65433-95-6)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com