5-Chloro-2-methoxy-4-methylbenzenesulfonic acid CAS 1368612-43-4
| CAS No. | 1368612-43-4 |
| Molecular Formula | C8H9ClO4S |
| Molecular Weight | 236.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C8H9ClO4S, 5-Chloro-2-methoxy-4-methylbenzenesulfonic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 236.67 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
5-Chloro-2-methoxy-4-methylbenzenesulfonic acid (CAS 1368612-43-4) is a high-purity analytical reference standard with the molecular formula C8H9ClO4S and a molecular weight of 236.67 g/mol.
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), 5-Chloro-2-methoxy-4-methylbenzenesulfonic 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 | C8H9ClO4S |
| Molecular Weight | 236.67 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2,5-Dimethoxybenzenesulfonyl chloride (CAS 1483-28-9)
- 2-(2,6-Dioxo-3-piperidinyl)-2,3-dihydro-1-oxo-1H-isoindole-4-sulfonyl chloride (CAS 2680530-27-0)
- Ethyl 4-chlorocinnoline-3-carboxylate (CAS 860776-85-8)
- 2-[4-(difluoromethoxy)-3-methoxyphenyl]ethanamine (CAS 823234-68-0)
- 1-(4-Chlorobenzyl)-5-nitroindoline-2,3-dione (CAS 278803-50-2)
- 3-Chloro-N-(furan-2-ylmethyl)-4-methylaniline (CAS 940367-55-5)
- N-(cyclohexylmethyl)pivalamide (CAS 1197966-23-6)
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- 2-(4-Bromo-2-pyridyl)-2-propanol (CAS 477252-20-3)
- 2-phenylquinolin-4-amine hydrochloride (CAS 65197-47-9)
- Ganirelix 1-4 peptide (CAS 208599-57-9)
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