7-(4-Bromophenyl)-5-hydroxy-2H-1,3-benzoxathiol-2-one CAS 327078-63-7
| CAS No. | 327078-63-7 |
| Molecular Formula | C13H7BrO3S |
| Molecular Weight | 323.16 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 7-(4-Bromophenyl)-5-hydroxy-2H-1,3-benzoxathiol-2-one (CAS 327078-63-7), a certified reference material (molecular formula C13H7BrO3S, MW 323.16 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, 7-(4-Bromophenyl)-5-hydroxy-2H-1,3-benzoxathiol-2-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 323.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C13H7BrO3S |
| Molecular Weight | 323.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromophenyl Standards
- 1-(4-Bromophenyl)-6-mercapto-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one (CAS 1404364-58-4)
- 1-(3-Bromophenyl)-6-mercapto-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one (CAS 1416342-23-8)
- 5-(3-(2-Bromophenyl)-1,2,4-oxadiazol-5-yl)thiazol-2-amine (CAS 1708401-00-6)
- 1-(4-Bromophenyl)-4-(2,2,2-trifluoroethyl)piperazine (CAS 1374342-27-4)
- 2-(2-(4-Bromophenyl)-2-oxoethyl)-5-methylcyclohexane-1,3-dione (CAS 112404-26-9)
- (2-Bromophenyl)(2,5-dimethoxyphenyl)methanol (CAS 1282186-22-4)
- (3-Bromophenyl)(2,5-dimethoxyphenyl)methanol (CAS 1282230-21-0)
- (2-Bromophenyl)(2,4-dimethoxyphenyl)methanol (CAS 1282958-88-6)
Recommended Standards
- 5-Bromo-2-((tert-butoxycarbonyl)amino)thiazole-4-carboxylic acid (CAS 914347-09-4)
- Flurbiprofen Impurity 165 (CAS CATO-C4X-1444165)
- 2-Bromo-9H-thioxanthene-9-one-10,10-dioxide (CAS 20077-15-0)
- Flurbiprofen Impurity 166 (CAS CATO-C4X-1444166)
- Penamecillin (CAS 983-85-7)
- 1-[(1-Ethyl-1H-pyrazol-4-yl)methyl]-3-methyl-1H-pyrazol-5-amine (CAS 1415719-24-2)
- Di(tridecyl) adipate (CAS 16958-92-2)
- (4,6-Dichloro-2-(difluoromethyl)pyridin-3-yl)methanol (CAS 1806802-85-6)
- 6-Azaindole-3-carbaldehyde (CAS 25957-65-7)
- 5-Chloro-3,3-dimethyl-2,3-dihydrobenzofuran-4-ol (CAS 1597548-43-0)
- 6-(Methylsulfonyl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 897367-08-7)
- 2,3-Dibromo-4,5,6,7-tetrahydro-1-benzothiophene (CAS 1785762-03-9)
- Methyl 2-benzamido-3-(dimethylamino)acrylate (CAS 125008-68-6)
- Semaglutide impurity 195 (CAS CATO-C4X-2226195)
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