2-chloro-5-(chlorosulfonyl)-3-methylbenzoic acid CAS 90048-72-9
| CAS No. | 90048-72-9 |
| Molecular Formula | C8H6Cl2O4S |
| Molecular Weight | 269.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2-chloro-5-(chlorosulfonyl)-3-methylbenzoic acid 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.
2-chloro-5-(chlorosulfonyl)-3-methylbenzoic acid (CAS 90048-72-9), molecular formula C8H6Cl2O4S and molecular weight 269.10 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, chlorine substitution, an aromatic ring system, 2-chloro-5-(chlorosulfonyl)-3-methylbenzoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 269.10 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).
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.
Physical & Chemical Properties
| Molecular Formula | C8H6Cl2O4S |
| Molecular Weight | 269.10 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 |
| 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.) | 1982 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related chloro Standards
- Methyl 4-chloro-3-(chlorosulfonyl)benzoate (CAS 1000933-19-6)
- Methyl 5-chloro-2-(chlorosulfonyl)benzoate (CAS 1119454-19-1)
- Methyl 3-chloro-5-(chlorosulfonyl)benzoate (CAS 1155083-83-2)
- 3-Chloro-5-(chlorosulfonyl)-4-methylbenzoic acid (CAS 1341830-84-9)
- 4-Chloro-3-(chlorosulfonyl)-5-methylbenzoic acid (CAS 1423024-38-7)
- 5-Chloro-3-(chlorosulfonyl)-2-methylbenzoic acid (CAS 1423028-58-3)
- 3-chloro-5-(chlorosulfonyl)-2-methylbenzoic acid (CAS 1702890-75-2)
- 6-Chloro-2,3-dihydro-1,4-benzodioxine-5-sulfonyl chloride (CAS 1785272-64-1)
Recommended Standards
- 2,4-Dichloro-5-methanesulfonylbenzoic acid (CAS 51521-75-6)
- 3,3,4,4,5,5,6,6-Octafluoro-2-imino-3,4,5,6-tetrahydro-2H-azepin-7-amine (CAS 1980063-89-5)
- 2,4'-Dichloro-3'-fluorobenzophenone (CAS 951890-52-1)
- 3,3-Dichloro-4-fluorobenzophenone (CAS 951890-01-0)
- (R)-Methyl 3-cyclobutyl-2-hydroxypropanoate (CAS 1235443-43-2)
- Diethyl 2-fluoro-2-(((methylsulfonyl)oxy)methyl)malonate (CAS 2710-86-3)
- 2-(Prop-2-yn-1-ylthio)benzo[d]oxazole (CAS 52924-71-7)
- tert-Butyl N-(Propan-2-yl)carbamate (CAS 51170-55-9)
- 4-Bromo-2-(2,2,2-trifluoroethyl)-1H-imidazole (CAS 1393540-97-0)
- 5-Bromo-4-hydrazinylpyridine-3-sulfonamide (CAS 1352497-80-3)
- 1-(Bromomethyl)-4-(trifluoromethyl)benzene (CAS 402-49-3)
- Tert-butyl 4-bromo-3,3-difluoropyrrolidine-1-carboxylate (CAS 2167546-25-8)
- 2-(3-Ethoxybenzyl)piperidine hydrochloride (CAS 1170163-05-9)
- Allo-Thr5-Tirzepatide (CAS CATO-CPTD788934)
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