3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one CAS 53-55-4
| CAS No. | 53-55-4 |
| Molecular Formula | C21H24O3 |
| Molecular Weight | 324.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C21H24O3, 3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 324.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one (CAS 53-55-4) is a high-purity analytical reference standard with the molecular formula C21H24O3 and a molecular weight of 324.41 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C21H24O3 |
| Molecular Weight | 324.41 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.) | 1957 |
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Recommended Standards
- 3-(4-Hexylbenzoyl)phenyl acetate (CAS 890099-96-4)
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- 4-[2-(4-Cyclohexylphenoxy)ethoxy]benzaldehyde (CAS 299441-39-7)
- Ethyl 5,7-dimethyl-3-phenylpyrazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1018144-32-5)
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- 4-Nitroisoxazol-5-amine (CAS 861543-32-0)
- 6-Hydroxy-2-phenyl-2H-pyrazolo[4,3-d]pyrimidine-5,7(4H,6H)-dione (CAS 16078-67-4)
- 5-Methyl-2-(4-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one (CAS 6402-09-1)
- 6-((2-Phenylhydrazono)methyl)pyrimidine-2,4(1H,3H)-dione (CAS 14304-71-3)
- 1,3-Dimethylpseudouridine (CAS 64272-68-0)
- Procaine Impurity 27 (CAS CATO-C4X-262327)
- Liraglutide (14-31)TFA Salt (CAS CATO-C4X-19927)
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