3-Methoxy-17-methylestra-2,5(10)-dien-17β-ol CAS 19590-65-9
| CAS No. | 19590-65-9 |
| Molecular Formula | C20H30O2 |
| Molecular Weight | 302.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-Methoxy-17-methylestra-2,5(10)-dien-17β-ol (CAS 19590-65-9) is a high-purity analytical reference standard with the molecular formula C20H30O2 and a molecular weight of 302.45 g/mol.
3-Methoxy-17-methylestra-2,5(10)-dien-17β-ol (C20H30O2) 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H30O2 |
| Molecular Weight | 302.45 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Methoxy Standards
- 3-Methoxy-7α-methyl-estra-2,5(10)-dien-17β-ol (CAS 15506-02-2)
- 3-Methoxy-7β-methyl-estra-2,5(10)-dien-17β-ol (CAS 32297-42-0)
- 6α-Methoxy 17β-Estradiol (CAS 74312-88-2)
- 4-Methoxy 17beta-Estradiol (CAS 26788-23-8)
- 4-Methoxy-N-methyl-N-(4,5,6,7-tetrahydrobenzo[d]thiazol-2-yl)benzamide (CAS 866134-21-6)
- N-(4-Methoxy-3-(prop-2-yn-1-yl)benzo[d]thiazol-2(3H)-ylidene)pivalamide (CAS 868674-46-8)
- 1170398-17-0 1-[(5-Methoxy-1-methyl-1H-indol-3-yl)methyl]piperidine-4-carboxylic acid MFCD14281874 (CAS 1170398-17-0)
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Recommended Standards
- 8,13(15)-Abietadienoic Acid (CAS 19402-33-6)
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- 9-Cis-13,14-Dihydro Retinoic Acid (CAS 176019-01-5)
- (8Z,11Z,14Z)-Icosa-8,11,14-trien-5-ynoic acid (CAS 58688-54-3)
- 4-Methyl-3H-[1,2,3]triazolo[4,5-c]pyridine (CAS 27582-17-8)
- 2-Methyl-2-azabicyclo[2.2.2]octan-6-ol (CAS 222313-87-3)
- 2-Chloro-3-(chloromethyl)-6,8-dimethylquinoline (CAS 948290-71-9)
- (S)-Benzyl 3-(aminomethyl)piperidine-1-carboxylate (CAS 1217977-05-3)
- 7-Hydroxy-3-(4-hydroxyphenyl)-8-methoxy-4H-chromen-4-one (CAS 915410-17-2)
- (3R,4S)-3,4-Dihydroxy-1-methylpyrrolidin-2-one (CAS 364752-95-4)
- 2-(4-Methoxyphenoxy)benzaldehyde (CAS 19434-36-7)
- Atrazine-Desisopropyl (CAS 1007-28-9)
- 2-Chloro-4-ethoxy-5-methoxypyrimidine (CAS 1353976-54-1)
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