0SWH68IQ5W 81-08-3 2-Sulfobenzoic acid cyclic anhydride Benzoic acid, o-sulfo-, cyclic anhydride (8CI) 3H-2,1-Benzoxathiol-3-one, 1,1-dioxide 2-Sulphobenzoic anhydride Benzoic acid, 2-sulfo-, cyclic anhydride EINECS 201-322-6 NSC 11208 o-Sulfobenzoic acid anhydride o-Sulfobenzoic acid, cyclic anhydride Sulfobenzoic anhydride UNII-0SWH68IQ5W CAS 81-08-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 81-08-3 |
| Molecular Formula | C7H4O4S |
| Molecular Weight | 184.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
0SWH68IQ5W 81-08-3 2-Sulfobenzoic acid cyclic anhydride Benzoic acid, o-sulfo-, cyclic anhydride (8CI) 3H-2,1-Benzoxathiol-3-one, 1,1-dioxide 2-Sulphobenzoic anhydride Benzoic acid, 2-sulfo-, cyclic anhydride EINECS 201-322-6 NSC 11208 o-Sulfobenzoic acid anhydride o-Sulfobenzoic acid, cyclic anhydride Sulfobenzoic anhydride UNII-0SWH68IQ5W (CAS 81-08-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H4O4S. Molecular weight: 184.17 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H4O4S |
| Molecular Weight | 184.17 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Recommended Standards
- CAS 286460-83-1 (CAS 286460-83-1)
- 3-(3,5-Difluoro-4-methylphenyl)propanal (CAS 1036396-21-0)
- N-Ethyl-5-fluoro-2-nitroaniline (CAS 475278-46-7)
- (4-(O-tolyl)isoxazol-5-yl)methanol (CAS 1383132-94-2)
- 5-Cyclopropylpyrrolidine-2-carboxylic acid hydrochloride (CAS 1955515-59-9)
- Ethyl (furan-2-ylmethyl) carbonate (CAS 57362-03-5)
- 5-(3-Hydroxyphenyl)-1h-pyrazole-3-carboxylic acid (CAS 690631-98-2)
- Itraconazole Methoxy ButyItriazolone Impurity (CAS CATO-C4X-149710)
- 2-(2,6-dimethoxyphenoxy)-1,3-benzothiazol-6-amine (CAS 1411154-91-0)
- D-Ile12-Tirzepatide (CAS CATO-CPTD788921)
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 13829788188 / jacky.chen@cato-chem.com