17a-Ethynyl-18-methylestra-3,5-diene-3,17ß-diol Diacetate CAS 13635-15-9
| CAS No. | 13635-15-9 |
| Molecular Formula | C25H32O4 |
| Molecular Weight | 396.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 17a-Ethynyl-18-methylestra-3,5-diene-3,17ß-diol Diacetate 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.
17a-Ethynyl-18-methylestra-3,5-diene-3,17ß-diol Diacetate (CAS 13635-15-9) is a high-purity analytical reference standard with the molecular formula C25H32O4 and a molecular weight of 396.52 g/mol.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, 17a-Ethynyl-18-methylestra-3,5-diene-3,17ß-diol Diacetate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 396.52 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.
Physical & Chemical Properties
| Molecular Formula | C25H32O4 |
| Molecular Weight | 396.52 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
Related a Standards
- 4-Ethynyl-1,4-dihydro-1-[(4-methylphenyl)sulfonyl]-4-phenyl-2H-3,1-benzoxazin-2-one (CAS 2224424-19-3)
- 4-Ethynyl-2,5-bis(octyloxy)benzaldehyde (CAS 585567-31-3)
- 17-alpha-Ethynyl Estradiol-3-Sulfate (CAS 24560-70-1)
- (2R)-4-{6-ethynyl-3-oxo-1H,2H,3H-pyrrolo[1,2-c]imidazol-2-yl}-2-methanesulfonyl-2-methyl-N-(oxan-2-yloxy)butanamide (CAS 1808271-29-5)
- 4-Ethynyl-1-((4-nitrophenyl)sulfonyl)-1,4-dihydro-2H-benzo[d][1,3]oxazin-2-one (CAS 2097770-05-1)
- 2-[8-Ethynyl-7-fluoro-3-(methoxymethoxy)-1-naphthalenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2858674-33-4)
- 1-Ethynyl-3,5-diiodobenzene (CAS 188348-48-3)
- 5-(8-Ethynyl-6-(pyridin-2-yl)-4H-benzo[f]imidazo[1,5-a][1,4]diazepin-3-yl)oxazole (CAS 2014348-91-3)
Recommended Standards
- Tert-butyl 4-((benzo[d]thiazol-2-ylsulfonyl)methyl)piperidine-1-carboxylate (CAS 1255146-97-4)
- 3,3-Di-tert-butyl-4H,4H-[1,1-binaphthalenylidene]-4,4-dione (CAS 148808-97-3)
- Enadoline (CAS 124378-77-4)
- 4-(2-(Acridin-9-yl)vinyl)-3-ethoxy-N,N-diethylaniline (CAS 157650-41-4)
- Inositol 1,3,4,5-tetrakisphosphate (Ins(1,3,4,5)P4 (CAS 210488-61-2)
- 5-(5,6-Dimethyl-1-(4-(trifluoromethyl)benzyl)-1H-benzo[d]imidazol-2-yl)pyridin-2(1H)-one (CAS 860787-83-3)
- 4-{[4-(pyridin-2-yl)piperazin-1-yl]methyl}-1,3-thiazol-2-amine (CAS 897935-20-5)
- Erlotinib Impurity 99 (CAS CATO-C4X-106999)
- (4-((2,4-Dimethylphenyl)carbamoyl)phenyl)boronic acid (CAS 913835-38-8)
- 5-Methyl-1-(4-(methylthio)phenyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1094373-30-4)
- N-((1-methylpiperidin-2-yl)methyl)propan-2-amine (CAS 1303906-46-8)
- 7-(3,5-Dimethylisoxazol-4-yl)-6-methoxy-4-(((R)-1-(pyridin-2-yl)ethyl)amino)quinoline-3-carboxamide (CAS 1300737-69-2)
- (4-Methyl-2-oxo-1,2,3,4-tetrahydroquinoxalin-6-yl)boronic acid (CAS 305790-80-1)
- Tau Peptide (74-102) (Exon 3/Insert 2 Domain) trifluoroacetate salt (CAS 1322695-34-0)
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