3H-benzo[c][1,2]oxathiol-3-one 1-oxide CAS 91837-36-4
| CAS No. | 91837-36-4 |
| Molecular Formula | C7H4O3S |
| Molecular Weight | 168.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3H-benzo[c][1,2]oxathiol-3-one 1-oxide (CAS 91837-36-4), molecular formula C7H4O3S and molecular weight 168.17 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 3H-benzo[c][1,2]oxathiol-3-one 1-oxide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 168.17 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).
As a certified reference material (CRM), 3H-benzo[c][1,2]oxathiol-3-one 1-oxide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H4O3S |
| Molecular Weight | 168.17 g/mol |
| Purity | >95% |
| 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.) | 1983 |
| Sulfur Atoms | 1 |
Related H Standards
- 1H-Benzo[d]imidazole-1,2-dicarbonitrile (CAS 55810-28-1)
- 1H-Benzo[d]imidazole-5,6-dicarbonitrile (CAS 267642-46-6)
- 1H-Benzo[g]indazole (CAS 233-41-0)
- 3H-Benzo[e]indazole (CAS 232-89-3)
- Benzo[d]thiazole-2-thiol (CAS 118090-09-8)
- Benzo[d]thiazole-6-thiol (CAS 854085-71-5)
- 1h-Benzo[d][1,2,3]triazole-5,6-dicarbonitrile (CAS 355435-70-0)
- Benzo[d]isothiazole 1,1-dioxide (CAS 5669-05-6)
Recommended Standards
- Tioxolone (CAS 4991-65-5)
- Famotidine Impurity 80 (CAS CATO-C4X-139280)
- Thieno[2,3-b]furan-5-carboxylic acid (CAS 934246-40-9)
- Taurine impurity 1 (CAS CATO-C4X-31181)
- (R)-3-(3-Nitrophenyl)piperazin-2-one (CAS 1228568-34-0)
- 3-((Cyclopentyloxy)methyl)piperidine (CAS 933759-52-5)
- Adrogolide (CAS 166591-11-3)
- CAS 693817-39-9 (CAS 693817-39-9)
- 2',4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 920016-97-3)
- (4-Chlorophenyl)(3,4-difluorophenyl)methanol (CAS 844683-37-0)
- 1-(3,4-Dimethoxy-2-nitrobenzyl)isoquinoline (CAS 33130-18-6)
- (S)-2-(((Benzyloxy)carbonyl)amino)-5-(1,3-dioxoisoindolin-2-yl)pentanoic acid (CAS 7767-00-2)
- (E)-N'-(1-(3-aminophenyl)ethylidene)-2-((1-bromonaphthalen-2-yl)oxy)acetohydrazide (CAS 349468-16-2)
- D-Thr5-Tirzepatide (CAS CATO-CPTD788926)
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