3-Oxo-2,3-dihydro-1H-indene-5-sulfonyl chloride CAS 255895-78-4
| CAS No. | 255895-78-4 |
| Molecular Formula | C9H7ClO3S |
| Molecular Weight | 230.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-Oxo-2,3-dihydro-1H-indene-5-sulfonyl chloride (CAS 255895-78-4), molecular formula C9H7ClO3S and molecular weight 230.67 g/mol, is a CATO reference standard with documented purity and traceability.
3-Oxo-2,3-dihydro-1H-indene-5-sulfonyl chloride (C9H7ClO3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C9H7ClO3S |
| Molecular Weight | 230.67 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 1-Oxo-2,3-dihydro-1H-indene-5-sulfonyl chloride (CAS 61565-36-4)
- (2,3-Dihydro-1H-inden-2-yl)methanesulfonyl chloride (CAS 348080-86-4)
- 2,3-Dihydro-1h-inden-5-ylmethanesulfonyl chloride (CAS 935534-04-6)
- (1-(2,3-Dihydro-1H-inden-2-yl)piperidin-4-yl)methanamine (CAS 1281222-44-3)
- 4-(2,3-dihydro-1H-inden-5-yl)-5-methyl-1,3-thiazol-2-amine (CAS 879350-77-3)
- 3’,4’-dihydro-1’H-spiro[cycloheptane-1,2’-quinazoline]-4’-one (CAS 101069-64-1)
- (2,3-Dihydro-1H-inden-5-yl)(piperazin-1-yl)methanone (CAS 1016519-39-3)
- 1-[2-(2,3-Dihydro-1H-indol-3-yl)ethyl]-2-pyrrolidinone (CAS 1016794-28-7)
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