2,4-Dibromo-16a-hydroxyestrone CAS 79258-14-3
| CAS No. | 79258-14-3 |
| Molecular Formula | C18H20Br2O3 |
| Molecular Weight | 444.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2,4-Dibromo-16a-hydroxyestrone (CAS 79258-14-3), a certified reference material (molecular formula C18H20Br2O3, MW 444.16 g/mol) for analytical method development and quality control.
Owing to a steroid core, a hydroxyl group, an ether linkage, bromine substitution, 2,4-Dibromo-16a-hydroxyestrone is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 444.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C18H20Br2O3 |
| Molecular Weight | 444.16 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- trans-3,4-Dibromo-N-methyl-N-(1-methyl-1-azaspiro[4.5]dec-6-yl)-benzamide (CAS 119878-31-8)
- 1,6-Dibromo-3,8-diisopropylpyrene (CAS 869340-02-3)
- (R)-(+)-3,3’-Dibromo-1,1’-bi-2-naphthol (CAS 111795-43-8)
- (S)-(-)-3,3’-Dibromo-1,1’-bi-2-naphthol (CAS 119707-74-3)
- (R)-(+)-3,3-Dibromo-1,1-bi-2-naphthol (CAS 149821-06-7)
- (R)-(-)-6,6’-Dibromo-1,1’-bi-2-naphthol (CAS 65283-60-5)
- (S)-(+)-6,6’-Dibromo-1,1’-bi-2-naphthol (CAS 80655-81-8)
- 2',5'-Dibromo-[1,1':4',1''-terphenyl]-4,4''-dicarbaldehyde (CAS 2375652-86-9)
Recommended Standards
- 4-(4-Bromophenyl)-2-[(4-bromophenyl)sulfanyl]-4-oxobutanoic acid (CAS 301193-64-6)
- 2,4-Dichloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (CAS 1404364-72-2)
- 2,3,5,6-Tetrabromo-4-chlorophenol (CAS 20188-28-7)
- Perfluorotriphenylene (CAS 17051-14-8)
- 2-Amino-5-(4-fluorophenyl)thiazole-4-carbohydrazide (CAS 886361-58-6)
- 4-Chloro-N-(phenylmethyl)-2-pyridinecarboxamide (CAS 116275-39-9)
- Methyl 5-chloro-2-propoxybenzoate (CAS 75230-38-5)
- 4-Phenyl-α-cyanocinnamamide (CAS 116374-04-0)
- 2-(((4-Fluorobenzo[d]thiazol-2-yl)methyl)thio)-3-methyl-6-(trifluoromethyl)pyrimidin-4(3H)-one (CAS 400088-17-7)
- 2-(5-Bromo-2,3-difluorophenyl)acetic acid (CAS 1780302-08-0)
- Furan-3(2H)-one (CAS 3511-31-7)
- 6-(Trifluoromethyl)quinolin-4-amine (CAS 247113-89-9)
- 2-(4-Fluoro-3-methoxyphenyl)morpholine (CAS 1251196-34-5)
- Gastrin Tetrapeptide (CAS 1947-37-1)
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