2-Chloro-5-(chlorosulfonyl)-benzoyl chloride CAS 547739-66-2
| CAS No. | 547739-66-2 |
| Molecular Formula | C7H3Cl3O3S |
| Molecular Weight | 273.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 273.52 g/mol gives 2-Chloro-5-(chlorosulfonyl)-benzoyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 2-Chloro-5-(chlorosulfonyl)-benzoyl chloride (CAS 547739-66-2), a certified reference material (molecular formula C7H3Cl3O3S, MW 273.52 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 2-Chloro-5-(chlorosulfonyl)-benzoyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 273.52 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H3Cl3O3S |
| Molecular Weight | 273.52 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
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- Hexachloroacetone (CAS 116-16-5)
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- 3-Cyclopropyl-1-isopropyl-1H-pyrazole-4-carboxylic acid (CAS 1550812-61-7)
- 2-Amino-4,5,6,7-tetrahydrobenzothiazole Hydrochloride (CAS 15951-21-0)
- 2-(Thiophen-2-yl)oxazol-5(4H)-one (CAS 230283-16-6)
- D-Trp25-Tirzepatide (CAS CATO-CPTD788909)
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