2-Hydroxy-5-Chlorosulfonylbenzoic Acid CAS 17243-13-9
| CAS No. | 17243-13-9 |
| Molecular Formula | C7H5ClO5S |
| Molecular Weight | 236.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 236.63 g/mol gives 2-Hydroxy-5-Chlorosulfonylbenzoic Acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Hydroxy-5-Chlorosulfonylbenzoic Acid (CAS 17243-13-9), molecular formula C7H5ClO5S and molecular weight 236.63 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Hydroxy-5-Chlorosulfonylbenzoic Acid (C7H5ClO5S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), 2-Hydroxy-5-Chlorosulfonylbenzoic 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 | C7H5ClO5S |
| Molecular Weight | 236.63 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.) | 1961 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- 5-amino-1-(4-chloro-3-fluorophenyl)-1H-pyrazole-4-carbonitrile (CAS 1506744-53-1)
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- 5-Amino-1-(4-chloro-2-fluorophenyl)-1h-pyrazole-4-carbonitrile (CAS 1416339-30-4)
- 5-Amino-1-(5-chloro-2-fluorophenyl)-1H-pyrazole-4-carbonitrile (CAS 1823276-36-3)
- 5-(o-Methoxyphenoxy)-4,6-dichloro-2-(4-pyridyl)pyrimidine (CAS 150727-72-3)
- 2-[(2,4-Dimethylphenyl)amino]-2-oxoethyl imidothiocarbamate hydrochloride (CAS 1047620-46-1)
- 4-Bromo-4'-(methoxymethoxy)-1,1'-biphenyl (CAS 153407-10-4)
- 2-Amino-3-(2,6-dichlorophenyl)propanoic acid (CAS 128833-96-5)
- 6-(Chloromethyl)-5-(difluoromethyl)-3-methylpyridin-2-amine (CAS 1806816-55-6)
- 4-(2-(Benzyloxy)ethoxy)aniline (CAS 726196-87-8)
- 1-(3-Methoxy-4-methylphenyl)cyclopropanamine (CAS 1152587-07-9)
- 3-Amino-6-chloro-4-picoline (CAS 66909-38-4)
- (1-(2-(Pyridin-4-yl)ethyl)piperidin-4-yl)methanamine (CAS 865075-31-6)
- Semaglutide Impurity 188 (CAS CATO-C4X-2226188)
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