2-Bromo-5-methoxybenzene-1-sulfonamide CAS 749253-03-0
| CAS No. | 749253-03-0 |
| Molecular Formula | C7H8BrNO3S |
| Molecular Weight | 266.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 266.11 g/mol gives 2-Bromo-5-methoxybenzene-1-sulfonamide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Bromo-5-methoxybenzene-1-sulfonamide (CAS 749253-03-0), molecular formula C7H8BrNO3S and molecular weight 266.11 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 2-Bromo-5-methoxybenzene-1-sulfonamide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 266.11 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 | C7H8BrNO3S |
| Molecular Weight | 266.11 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 1986 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Bromo Standards
- N-(4-Bromo-2-hydroxyphenyl)methanesulfonamide (CAS 105295-63-4)
- 5-(4-Bromo-2-fluorophenyl)-2-methylpyridine (CAS 1187163-44-5)
- 2-(4-Bromo-2-fluorophenyl)-5-methylpyridine (CAS 1187163-97-8)
- 2-(4-Bromo-2-fluorophenyl)-6-methylpyridine (CAS 1187168-20-2)
- 4-(4-Bromo-2-fluorophenyl)-2-methylpyridine (CAS 1187168-25-7)
- 2-(4-Bromo-2-fluorophenyl)-4-methylpyridine (CAS 1187168-33-7)
- 2-(4-Bromo-2-fluorophenyl)-3-methylpyridine (CAS 1187169-99-8)
- 4-Bromo-3-methoxybenzenesulfonamide (CAS 1206104-66-6)
Recommended Standards
- (6-Bromopyridin-2-yl)methyl methanesulfonate (CAS 557789-12-5)
- 3-Bromo-4-methoxybenzene-1-sulfonamide (CAS 23095-03-6)
- 2-Amino-6-bromo-4-(methylsulfonyl)phenol (CAS 1820889-74-4)
- 3-Bromo-5-(4-fluorobenzyl)pyridine (CAS 2586126-86-3)
- 1-Butyl-4-vinylbenzene (CAS 26206-42-8)
- 3-(5-Bromo-2-methoxyphenyl)-2,2-dimethylpropanoic acid (CAS 1274124-39-8)
- (5-(3-Fluorophenyl)-1H-indol-3-yl)-N,N-dimethylmethanamine (CAS 1214345-82-0)
- 3-(Aminomethyl)cyclopentanol, 97% (CAS 116649-87-7)
- 3-Aminothiolane-3-carboxylic acid (CAS 32418-99-8)
- tert-Butyl 4-(2,6-dichloropyridin-4-yl)piperazine-1-carboxylate (CAS 1367126-89-3)
- 3-(3-Chlorophenyl)butan-2-ol (CAS 1506114-24-4)
- Brinzolamide Impurity 16 (CAS 171273-35-1)
- Cyclobutyl(thiophen-3-yl)methanamine (CAS 1337087-22-5)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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