2,4-Dichloro-5-methylbenzenesulfonyl chloride CAS 28286-86-4
| CAS No. | 28286-86-4 |
| Molecular Formula | C7H5Cl3O2S |
| Molecular Weight | 259.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,4-Dichloro-5-methylbenzenesulfonyl chloride (CAS 28286-86-4), molecular formula C7H5Cl3O2S and molecular weight 259.54 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2,4-Dichloro-5-methylbenzenesulfonyl chloride (C7H5Cl3O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 259.54 g/mol, it falls into the medium-molecular-weight range. 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).
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.
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 | C7H5Cl3O2S |
| Molecular Weight | 259.54 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Dichloro Standards
- 4,5-Dichloro-2-methylbenzenesulfonyl chloride (CAS 1215295-88-7)
- 2,4-Dichloro-6-methylbenzenesulphonyl chloride (CAS 175278-26-9)
- 2,5-Dichloro-3-methylbenzenesulfonyl chloride (CAS 1803835-89-3)
- 2,3-Dichloro-5-methylbenzenesulfonyl chloride (CAS 871876-53-8)
- 2,4-Dichloro-3-methylbenzene-1-sulfonyl chloride (CAS 69145-58-0)
- 2,5-Dichloro-4-methylbenzene-1-sulfonyl chloride (CAS 473477-22-4)
- 2,6-Dichloro-3-methylbenzene-1-sulfonyl chloride (CAS 64063-38-3)
- 2,6-Dichloro-4-methylbenzene-1-sulfonyl chloride (CAS 90196-19-3)
Recommended Standards
- [(Trichloromethyl)sulfonyl]benzene (CAS 42764-08-9)
- (3,4-Dichlorophenyl)methanesulfonyl Chloride (CAS 85952-30-3)
- 3,5-Dichloro-2-methylbenzenesulfonyl chloride (CAS 858004-29-2)
- (2,6-Dichlorophenyl)methanesulfonyl chloride (CAS 85952-31-4)
- N-Suberylglycine-2,2,7,7-d (CAS 60317-54-6)
- 3-(Morpholin-4-yl)-4H-chromen-4-one (CAS 40302-80-5)
- 6-Methoxy-2,3-dimethyl-1H-indole (CAS 58176-56-0)
- Acarbose EP Impurity A (CAS 1013621-79-8)
- 1-(4-tert-Butylbenzoyl)-4-methylpiperazine (CAS 324068-33-9)
- 3-[5-(difluoromethyl)-7-oxo-4H,7H-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]propanoic acid (CAS 1018151-04-6)
- 6,8-Dimethoxy-1-(2-methoxyphenyl)-4-methyl-1H,2H,3H-pyrrolo[3,2-c]quinoline (CAS 860789-27-1)
- 3-(2,5-Dimethyl-1-(5-methylisoxazol-3-yl)-1h-pyrrol-3-yl)acrylic acid (CAS 851722-06-0)
- 2,5-Dichloro-N-((3-methyl-1,2,4-oxadiazol-5-yl)methyl)benzamide (CAS 1207055-26-2)
- SAMS Peptide (CAS 125911-68-4)
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