2-Bromo 17-beta-Estradiol CAS 15833-07-5
| CAS No. | 15833-07-5 |
| Molecular Formula | C18H23BrO2 |
| Molecular Weight | 351.28 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.
2-Bromo 17-beta-Estradiol (CAS 15833-07-5) is a high-purity analytical reference standard with the molecular formula C18H23BrO2 and a molecular weight of 351.28 g/mol.
Based on its molecular formula C18H23BrO2, 2-Bromo 17-beta-Estradiol contains a steroid core, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 351.28 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H23BrO2 |
| Molecular Weight | 351.28 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 4-Bromo 17-beta-Estradiol (CAS 1630-83-7)
- 5-Bromo-4-hydrazinyl-N,N-dipropylpyridine-3-sulfonamide (CAS 1352483-71-6)
- 5-Bromo-2,4-difluoro-3-(triethylsilyl)benzoic acid (CAS 651027-08-6)
- (4-bromo-6-fluoro-5-hydroxy-2-naphthyl) 2,2-dimethylpropanoate (CAS 2763159-24-4)
- 1-[(5-Bromo-2-fluoro-4-methylsulfonyl)phenyl]-homopiperazine (CAS 1020722-22-8)
- Ethyl 6-bromo-4-(diethylamino)quinoline-3-carboxylate (CAS 1215814-78-0)
- 1-((4-Bromo-2-fluorophenyl)sulfonyl)-4-ethylpiperazine (CAS 1331185-87-5)
- 1-(4'-Bromo-[1,1'-biphenyl]-4-yl)-2-phenylethan-1-one (CAS 60312-95-0)
Recommended Standards
- (1-Ethyl-5-hydroxy-1H-pyrazol-4-yl)-(4-oxazol-2-yl-2-trifluoromethyl-phenyl)-methanone (CAS 1231641-39-6)
- (S)-2-Amino-3-(4-((diethoxyphosphoryl)difluoromethyl)phenyl)propanoic acid (CAS 160751-42-8)
- 3-Hydroxy-2-(4-oxazol-2-yl-2-trifluoromethyl-benzoyl)-cyclohex-2-enone (CAS 1231625-97-0)
- (1-Ethyl-5-hydroxy-1H-pyrazol-4-yl)-(2-oxazol-2-yl-4-trifluoromethyl-phenyl)-methanone (CAS 1231583-70-2)
- Pyrene-1,3,6,8-tetracarbonitrile (CAS 28496-11-9)
- tert-Butyl 1-benzyl-1,6-diazaspiro[3.3]heptane-6-carboxylate (CAS 1431868-59-5)
- 5-Bromo-3-(difluoromethyl)-2-(trifluoromethyl)pyridin-4-amine (CAS 1804449-56-6)
- Tert-butyl6-oxo-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (CAS 852875-99-1)
- 5-[1-(2,5-Dimethoxy-phenyl)-meth-(Z)-ylidene]-imidazolidine-2,4-dione (CAS 154617-49-9)
- ((6-(Trifluoromethyl)pyridin-3-yl)methyl)boronic acid (CAS 1392191-88-6)
- 2-(Difluoromethyl)-5-ethylbenzo[d]oxazole (CAS 1803856-35-0)
- 1-[(1-tert-Butyl-5-oxopyrrolidin-3-yl)carbonyl]-piperidine-4-carboxylic acid (CAS 1199215-86-5)
- 1-(4-(Trifluoromethyl)phenyl)-6,7-dihydro-1H-indazol-4(5H)-one (CAS 1203661-44-2)
- Semaglutide238 (CAS CATO-C4X-2226238)
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