2-chloro-5-methoxybenzene-1-sulfonyl chloride CAS 201935-41-3
| CAS No. | 201935-41-3 |
| Molecular Formula | C7H12Cl2O3S |
| Molecular Weight | 247.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-chloro-5-methoxybenzene-1-sulfonyl chloride (CAS 201935-41-3) is a high-purity analytical reference standard with the molecular formula C7H12Cl2O3S and a molecular weight of 247.14 g/mol.
Based on its molecular formula C7H12Cl2O3S, 2-chloro-5-methoxybenzene-1-sulfonyl chloride contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 247.14 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H12Cl2O3S |
| Molecular Weight | 247.14 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 | Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 2014 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- 2-Amino-3,5-dimethylphenyboronic acid pinacol ester (CAS 2121514-04-1)
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- 2,5-Dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (CAS 2268778-20-5)
- 2-Isopropyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2223049-74-7)
- 6-((Thietan-3-ylamino)methyl)nicotinonitrile (CAS 1874431-55-6)
- 2,6-dichloro-4-N-methylpyridine-3,4-diamine (CAS 914942-86-2)
- (S)-1-Boc-piperidine-3-carbohydrazide (CAS 625470-88-4)
- Methyl 4-amino-1-(cyclobutylmethyl)-1h-pyrrole-2-carboxylate (CAS 1467871-04-0)
- Ezetimibe Impurity 124 (CAS 1251741-03-3)
- (3-Chloro-4-(trifluoromethyl)phenyl)hydrazine (CAS 68359-95-5)
- N-Me-Val-OMe · HCl (CAS 3339-44-4)
- 2-(Ethylamino)-2-methyl-4-(1h-1,2,4-triazol-1-yl)pentanamide (CAS 1342373-23-2)
- 2-[(2-Thienylcarbonyl)amino]-1,3-thiazole-4-carboxylic acid (CAS 941869-49-4)
- Semaglutide impurity 58 (CAS CATO-C4X-222658)
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