4-Oxo-4H-1-benzothiopyran-3-carboxylic acid CAS 72798-57-3
| CAS No. | 72798-57-3 |
| Molecular Formula | C10H6O3S |
| Molecular Weight | 206.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Oxo-4H-1-benzothiopyran-3-carboxylic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Oxo-4H-1-benzothiopyran-3-carboxylic acid (CAS 72798-57-3), molecular formula C10H6O3S and molecular weight 206.22 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Oxo-4H-1-benzothiopyran-3-carboxylic acid (C10H6O3S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4-Oxo-4H-1-benzothiopyran-3-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C10H6O3S |
| Molecular Weight | 206.22 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Sulfur Atoms | 1 |
Recommended Standards
- 4-Fluorospiro[indoline-3,3'-pyrrolidin]-2-one (CAS 2386363-40-0)
- 4-Phenyl-1,2,3-thiadiazole-5-carboxylic acid (CAS 78875-63-5)
- 4-Fluoro-N1-(2-furylmethyl)-1,2-benzenediamine (CAS 912770-58-2)
- 4-Phenyl-1,2,5-thiadiazole-3-carboxylic acid (CAS 72234-46-9)
- 2,6,7-Trimethoxyquinoline (CAS 6278-88-2)
- 1-(2,3-Dimethylphenyl)-3-(3-fluorophenyl)propan-1-one (CAS 898789-20-3)
- 4-Cyclopropoxy-6-formylpicolinamide (CAS 1243460-22-1)
- (4-Nitrostyryl)boronic acid (CAS 216019-32-8)
- 2-(3-Methylpiperidin-1-yl)acetamide (CAS 891425-12-0)
- 4,8-Dibromo-2-(trifluoromethyl)quinoline (CAS 587885-93-6)
- 3-(Cyclohexylmethyl)-1,2-oxazol-5-amine (CAS 1092285-76-1)
- 5-[4-(Trifluoromethyl)phenyl]-1H-indole-2,3-dione (CAS 893736-59-9)
- 3-(azetidin-1-yl)-6-chloropyridazine (CAS 1352754-17-6)
- Atrial Natriuretic Peptide (ANP)(1-28) Alpha (Human, Ovine, Canine) (CAS 91917-63-4)
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