5-Methyl-2,1,3-benzoxadiazole-4-sulfonyl chloride CAS 1152431-76-9
| CAS No. | 1152431-76-9 |
| Molecular Formula | C7H5ClN2O3S |
| Molecular Weight | 232.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methyl-2,1,3-benzoxadiazole-4-sulfonyl chloride (CAS 1152431-76-9), molecular formula C7H5ClN2O3S and molecular weight 232.64 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 5-Methyl-2,1,3-benzoxadiazole-4-sulfonyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 232.64 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H5ClN2O3S |
| Molecular Weight | 232.64 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 2,1,3-Benzoxadiazole-4-sulfonamide (CAS 114322-13-3)
- ethyl 2,1,3-benzoxadiazole-4-carboxylate (CAS 37466-85-6)
- 2,1,3-Benzoxadiazole, 4-(4-methyl-1-piperazinyl)-7-nitro-, 3-oxide (CAS 58131-57-0)
- methyl 2,1,3-benzoxadiazole-4-carboxylate (CAS 408502-47-6)
- 19164-42-2 2,1,3-Benzoxadiazole-5-carbaldehyde 1-oxide 6454AD C7H4N2O3 (CAS 19164-42-2)
- 4-Methyl-2,1,3-benzoxadiazole (CAS 29091-40-5)
- 5-Methyl-2,1,3-benzoxadiazole (CAS 20304-86-3)
Recommended Standards
- 1-Oxo-1,3-dihydro-2-benzofuran-4-sulfonyl chloride (CAS 1114822-78-4)
- (2-Chloro-4-fluoro-3-methoxy)-3-phenylpropanoicacid (CAS 1171917-26-2)
- 3-(3-Chloro-4-fluorophenoxy)butanoic acid (CAS 111478-28-5)
- 2-Chloro-6-(2-fluorophenyl)nicotinonitrile (CAS 1171926-91-2)
- 4-(5-((2,6-Dichlorobenzyl)thio)-4-ethyl-4H-1,2,4-triazol-3-yl)pyridine (CAS 618427-02-4)
- Hydroxy Bupropion (CAS 357399-43-0)
- N-(Methoxycarbonyl)-D-valine methyl ester (CAS 153575-98-5)
- N-Caffeoyl O-methyltyramine (CAS 189307-47-9)
- Paliperidone Impurity 16 (CAS 1006685-69-3)
- 1-(4-Chlorobenzyl)-3-((1-cyclopentylpiperidin-4-yl)methyl)urea (CAS 1208735-12-9)
- 2-(3-chloro-4-fluorophenyl)-1,3-thiazole-4-carboxylic acid (CAS 549526-19-4)
- 2-methylimidazo[1,2-a]pyridine-3-carbaldehyde (CAS 30384-93-1)
- 1-Propanethiol-SD (CAS 64071-73-4)
- Macrophage Inhibitory Peptide (CAS 41961-56-2)
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