5-Hydroxy-7-methyl-2H-1,3-benzoxathiol-2-one CAS 17631-00-4
| CAS No. | 17631-00-4 |
| Molecular Formula | C8H6O3S |
| Molecular Weight | 182.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Hydroxy-7-methyl-2H-1,3-benzoxathiol-2-one (C8H6O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 182.20 g/mol, it falls into the medium-molecular-weight range. 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).
CATO supplies 5-Hydroxy-7-methyl-2H-1,3-benzoxathiol-2-one (CAS 17631-00-4), a certified reference material (molecular formula C8H6O3S, MW 182.20 g/mol) for analytical method development and quality control.
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 | C8H6O3S |
| Molecular Weight | 182.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 3-Hydroxy-2-methyl-2H-pyrazolo[4,3-d]pyrimidine-7(4H)-thione (CAS 100565-58-0)
- 5-Hydroxy-4-methylbenzo[d][1,3]oxathiol-2-one (CAS 1279207-49-6)
- 6-Hydroxy-4-methyl-2H-1,3-benzoxathiol-2-one (CAS 154268-42-5)
- 7-Hydroxy-6-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one (CAS 183170-88-9)
- 5-Hydroxy-6-methyl-7H-thiazolo[3,2-a]pyrimidin-7-one (CAS 883017-26-3)
- 4-Hydroxy-3-methoxybenzohydrazide (CAS 100377-63-7)
- 4-Hydroxy-2-isopropylpyrimidine-5-carboxylic acid (CAS 1120258-83-4)
- Methyl 2-hydroxy-4,6-dimethylpyrimidine-5-carboxylate (CAS 1147294-72-1)
Recommended Standards
- 2-(Pyridin-2-ylsulfonyl)acetonitrile (CAS 170449-34-0)
- 5-(Methylsulfonyl)nicotinonitrile (CAS 1780797-86-5)
- 3-Amino-6-methyl-7H-thiazolo[3,2-b][1,2,4]triazin-7-one (CAS 16943-37-6)
- 6-Methoxyimidazo[2,1-b][1,3]thiazole-5-carbaldehyde (CAS 180688-62-4)
- 2-(Difluoromethoxy)-1-fluoro-3-iodobenzene (CAS 1261763-19-2)
- (5-(tert-Butyl)-4-fluoro-2-methoxyphenyl)boronic acid (CAS 944317-24-2)
- 2-Amino-5-Bromo-6-Methylpyridine (CAS 42753-71-9)
- 3-(2,3-Difluoro-4-methylphenyl)propanoic acid (CAS 1017779-58-6)
- 1-Chloro-2-(trifluoromethoxy)-4-(trifluoromethyl)benzene (CAS 94444-78-7)
- 2-Amino-2-cyclopropylacetamide (CAS 1100749-41-4)
- N-[3-(2,1,3-Benzothiadiazol-5-ylamino)-2-quinoxalinyl]-4-methylbenzenesulfonamide, (CAS 956958-53-5)
- 1845AE 3-(4-Chlorophenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid 372107-14-7 C16H11ClN2O2 (CAS 372107-14-7)
- N-((1-methyl-1H-pyrazol-4-yl)methyl)-2-(pyridin-2-yl)ethan-1-amine (CAS 1152840-97-5)
- Semaglutide Impurity 133 (CAS CATO-C4X-2226133)
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