Cyproterone Acetate CAS 427-51-0
| CAS No. | 427-51-0 |
| Molecular Formula | C24H29ClO4 |
| Molecular Weight | 416.94 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| 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 Cyproterone Acetate.
CATO supplies Cyproterone Acetate (CAS 427-51-0), a certified reference material (molecular formula C24H29ClO4, MW 416.94 g/mol) for analytical method development and quality control.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution, Cyproterone Acetate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 416.94 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Cyproterone Acetate 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 | C24H29ClO4 |
| Molecular Weight | 416.94 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Cyproterone Standards
- Cyproterone Acetate-D3 (CAS 427-51-0 (non-labelled))
- Cyproterone Acetate EP Impurity B (CAS CATO-C4X-16013)
- Cyproterone Acetate EP Impurity I (CAS 13698-49-2)
- Cyproterone Acetate Impurity 2 (CAS 65423-26-9)
- Cyproterone Acetate EP Impurity G (CAS 23814-84-8)
- Cyproterone Acetate EP Impurity D (CAS CATO-C4X-16012)
- Cyproterone Acetate EP Impurity J (CAS 15423-97-9)
- Cyproterone Acetate EP Impurity E (CAS 17184-05-3)
Recommended Standards
- Bepotastine Ethyl Ester (CAS 190730-39-3)
- 3-((4-(3-Chlorophenyl)piperazin-1-yl)methyl)-6-methyl-2-phenylimidazo[1,2-a]pyridine (CAS 338415-59-1)
- Levocetirizine Impurity 43 (CAS 1116338-10-3)
- 3-((4-Benzylpiperazin-1-yl)methyl)-2-(4-chlorophenyl)imidazo[1,2-a]pyridine (CAS 338401-75-5)
- 4-Fluoronaphthalene-2-carboxaldehyde (CAS 1261783-61-2)
- (2,6-Dimethoxyphenyl)(pyridin-3-yl)methanone (CAS 52856-17-4)
- N-Acetyl-2-O-methyl-α-neuraminic Acid 9-Acetate (CAS 143791-32-6)
- (2R-3S-4S-5R-6S)-3-4-5-Trihydroxy-2-hydroxymethyl-7-9-diaza-1-oxa-spiro[4-5]decane-10-one-8-thione (CAS 227458-60-8)
- Ozanimod Impurity 14 (CAS CATO-C4X-290214)
- 4-Propyltetrahydro-2H-pyran-4-carboximidamide (CAS 1255147-43-3)
- 7-Azatryptophan, 97% (CAS 7303-50-6)
- Lacosamide EP Impurity C (CAS CATO-C4X-183049)
- 1-Amino-3-hydroxy-3-methylbutan-2-one hydrochloride (CAS 885033-77-2)
- Semaglutide impurity 88 (CAS CATO-C4X-222688)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com