(3|A,17|A)-Estr-5(10)-ene-3,17-diol 3|A,17|A-Dihydroxy-19-norandrost-5(10)-ene 4993-32-2 CAS 4993-32-2
| CAS No. | 4993-32-2 |
| Molecular Formula | C18H28O2 |
| Molecular Weight | 276.41 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 (3|A,17|A)-Estr-5(10)-ene-3,17-diol 3|A,17|A-Dihydroxy-19-norandrost-5(10)-ene 4993-32-2.
(3|A,17|A)-Estr-5(10)-ene-3,17-diol 3|A,17|A-Dihydroxy-19-norandrost-5(10)-ene 4993-32-2 (CAS 4993-32-2) is a high-purity analytical reference standard with the molecular formula C18H28O2 and a molecular weight of 276.41 g/mol.
Based on its molecular formula C18H28O2, (3|A,17|A)-Estr-5(10)-ene-3,17-diol 3|A,17|A-Dihydroxy-19-norandrost-5(10)-ene 4993-32-2 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 276.41 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).
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 | C18H28O2 |
| Molecular Weight | 276.41 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Recommended Standards
- 2-propenoic acid 9-anthracenylmethyl ester 31645-34-8 A820939 anthracen-9-ylmethyl prop-2-enoate (CAS 31645-34-8)
- 3-{2-[(1-benzyl-6-methoxyquinolinium-2-yl)methylidene]-2h-1|E4,3-benzoselenazol-1-yl}propane-1-sulfonate 64709-55-3 AR-1F1377 (CAS 64709-55-3)
- 17|A-Hydroxy-5|A,10|A-estran-3-one 22786-93-2 5|A,10|A-Estran-17|A-ol-3-one (CAS 22786-93-2)
- 84-47-9 9,10-Anthracenedione, 2-(1,1-dimethylethyl)- Anthraquinone, 2-tert-butyl- (8CI) 2-tert-Butylanthraquinone beta-tert-Butylanthraquinone 2-tert-Butyl-9,10-anthraquinone EINECS 201-531-2 NSC 30548 (CAS 84-47-9)
- Methyl 4-acetamido-5-iodo-2-methoxybenzoate (CAS 201214-53-1)
- Methyl 5-methoxy-2-(trifluoromethyl)benzoate (CAS 1214324-68-1)
- 3-((2-Methoxyethyl)amino)tetrahydrothiophene 1,1-dioxide (CAS 786637-37-4)
- Palbociclib Impurity 70 (CAS 1883672-48-7)
- Ethyl 8-benzoyl-4,6-dichloro-3-quinolinecarboxylate (CAS 339099-41-1)
- 2-Formyl-3-iodobenzoic acid (CAS 1269488-67-6)
- Tert-butyl 3-bromo-6,7-dihydro-5H-pyrrolo[1,2-a]imidazole-2-carboxylate (CAS 1263285-53-5)
- Brivudine Impurity 8 (CAS 34846-90-7)
- Fmoc-D-Glu(allyl ester)-OH (CAS 204251-33-2)
- Neuropeptide GE (CAS 134748-04-2)
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