2-Bromoethyl 4-methylbenzenesulfonate CAS 19263-21-9
| CAS No. | 19263-21-9 |
| Molecular Formula | C9H11BrO3S |
| Molecular Weight | 279.15 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.
CATO supplies 2-Bromoethyl 4-methylbenzenesulfonate (CAS 19263-21-9), a certified reference material (molecular formula C9H11BrO3S, MW 279.15 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 2-Bromoethyl 4-methylbenzenesulfonate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 279.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C9H11BrO3S |
| Molecular Weight | 279.15 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromoethyl Standards
- 2-(2-bromoethyl)-6-phenyl-2,3-dihydropyridazin-3-one (CAS 22578-53-6)
- (1-(2-Bromoethyl)cyclopropoxy)(tert-butyl)dimethylsilane (CAS 380605-61-8)
- 1,2-Bis(2-bromoethyl)disulfane (CAS 1002-40-0)
- N-(2-Bromoethyl)-4-methylbenzenesulfonamide (CAS 4556-90-5)
- 1-(2-Bromoethyl)-3-(bromomethyl)benzene (CAS 143260-79-1)
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Recommended Standards
- 5-bromo-4-fluoro-naphthalene-1-carboxylic acid (CAS 1897839-21-2)
- 3-Bromophenoxathiine (CAS 192799-87-4)
- 4-Bromo-5-(butoxymethyl)-1-(2-fluoroethyl)-1H-pyrazole (CAS 1856097-28-3)
- [(2-bromophenyl)sulfamoyl]dimethylamine (CAS 349540-50-7)
- (S)-Dimethyl 2-hydroxypentanedioate (CAS 55094-97-8)
- 1-(4-Bromophenyl)-3-(4-fluorophenyl)-1H-pyrazole-5-carboxylic acid (CAS 618383-15-6)
- 2-Hydroxy-2-[2-(trifluoromethyl)phenyl]acetic acid (CAS 339-93-5)
- 8-Hydroxyquinoline-3-carboxylic acid (CAS 911109-16-5)
- 4-(2-Methoxyethoxy)benzene-1,2-diamine (CAS 54029-78-6)
- 3-[(2-chloro-4-fluorophenyl)methoxy]benzaldehyde (CAS 588681-49-6)
- Ethyl 5-nitro-7-(trifluoromethyl)benzo[d]thiazole-2-carboxylate (CAS 40160-45-0)
- 5-[4-(Prop-2-en-1-yl)-5-sulfanyl-4H-1,2,4-triazol-3-yl]-1-{[3-(trifluoromethyl)phenyl]methyl}-1,2-dihydropyridin-2-one (CAS 477852-98-5)
- 2-(Pyrrolidin-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 1259445-03-8)
- Semaglutide impurity 210 (CAS CATO-C4X-2226210)
Why CATO?
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