2,4-Dichloro-5-(fluorosulfonyl)benzoic acid CAS 33866-08-9
| CAS No. | 33866-08-9 |
| Molecular Formula | C7H3Cl2FO4S |
| Molecular Weight | 273.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 2,4-Dichloro-5-(fluorosulfonyl)benzoic acid (CAS 33866-08-9), a certified reference material (molecular formula C7H3Cl2FO4S, MW 273.07 g/mol) for analytical method development and quality control.
Structurally, 2,4-Dichloro-5-(fluorosulfonyl)benzoic acid (C7H3Cl2FO4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 273.07 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).
As a certified reference material (CRM), 2,4-Dichloro-5-(fluorosulfonyl)benzoic 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.
Physical & Chemical Properties
| Molecular Formula | C7H3Cl2FO4S |
| Molecular Weight | 273.07 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.) | 1966 |
| Halogen Content | F/Cl-containing |
| Sulfur Atoms | 1 |
Related Dichloro Standards
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- Methyl 7,9-dichloro-4-oxo-4h-pyrido[1,2-a]pyrimidine-2-carboxylate (CAS 2007920-66-1)
- 3,5-Dichloro-6-(3-fluorophenyl)-1-methylpyrazin-2(1H)-one (CAS 1269529-93-2)
- 3,5-Dichloro-6-(4-fluorophenyl)-1-methylpyrazin-2(1H)-one (CAS 1269530-80-4)
- 3,5-Dichloro-6-(2-fluorophenyl)-1-methylpyrazin-2(1H)-one (CAS 1269533-60-9)
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Recommended Standards
- 2,3-Dihydro-6-iodoquinolin-4(1h)-one (CAS 38470-27-8)
- 1-(3,4-Dichlorophenyl)-2,4,6(1H,3H,5H)-pyrimidinetrione (CAS 340300-14-3)
- 2-Bromo-4-(trifluoromethoxy)benzenethiol (CAS 875143-35-4)
- (5-(Benzylcarbamoyl)-2-fluorophenyl)boronic acid (CAS 874289-53-9)
- 6-Chloro-1-ethyl-1H-pyrazolo[3,4-b]pyridine-5-carbaldehyde (CAS 898911-76-7)
- 6-(Isopropyl(methyl)amino)hexan-2-ol (CAS 1247524-77-1)
- Aluminum trihexadecan-1-olate (CAS 19141-82-3)
- 2,2,4-Trimethyl-1,2,3,4-tetrahydroquinolin-6-yl 2-(1,3-dioxoisoindolin-2-yl)propanoate (CAS 488714-91-6)
- 2,5-Dimethylindoline (CAS 90874-56-9)
- Cefalexin Impurity 49 (CAS CATO-C4X-126149)
- 2-(Chloromethyl)-6-(difluoromethyl)-4-fluoropyridine-3-carboxylic acid (CAS 1805056-16-9)
- N-benzyl-6-chloro-N-ethylpyridazin-3-amine (CAS 1094315-96-4)
- Methyl 2-(3-(methylthio)phenyl)-2-oxoacetate (CAS 1379368-89-4)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
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