Onapristone CAS 96346-61-1
| CAS No. | 96346-61-1 |
| Molecular Formula | C29H39NO3 |
| Molecular Weight | 449.62 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 Onapristone.
Onapristone (CAS 96346-61-1), molecular formula C29H39NO3 and molecular weight 449.62 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C29H39NO3, Onapristone contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 449.62 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Onapristone under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C29H39NO3 |
| Molecular Weight | 449.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 1257083-94-5 Heronamide C (CAS 1257083-94-5)
- Cholic Acid Impurity 22 (CAS 360-65-6)
- Tert-butyl N-[6-[tert-butyl(dimethyl)silyl]oxy-3-(3-nitro-4-pyridyl)cyclohex-2-en-1-yl]carbamate (CAS 1210417-89-2)
- Ursodeoxycholic Acid Impurity 121 (CAS CATO-C4X-1422121)
- Methyl 2-methyl-3-[4-(trifluoromethoxy)phenyl]benzoate (CAS 1630035-51-6)
- 2-(2-chloroethyl)cyclobutanone (CAS 1935967-74-0)
- 2'-Fluoro-[1,1'-biphenyl]-3-amine (CAS 176032-77-2)
- Olmesartan Methyl Ether (CAS 1039762-40-7)
- 1-((3-Bromothiophen-2-yl)methyl)-1h-pyrazol-3-amine (CAS 1250547-14-8)
- Ethyl 4-nitro-L-phenylalanine (CAS 34276-53-4)
- (S)-2-(Hex-5-enamido)propanoic acid (CAS 205821-55-2)
- N1-((6-methoxypyridazin-3-yl)methyl)-N1-methylethane-1,2-diamine (CAS 1353960-34-5)
- 1-(Chloromethyl)-4-methyl-1h-pyrazole (CAS 757152-30-0)
- Semaglutide impurity 69 (CAS CATO-C4X-222669)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com