2-Chloro-3-nitrobenzenesulfonamide CAS 1261761-91-4
| CAS No. | 1261761-91-4 |
| Molecular Formula | C6H5ClN2O4S |
| Molecular Weight | 236.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2-Chloro-3-nitrobenzenesulfonamide 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.
2-Chloro-3-nitrobenzenesulfonamide (CAS 1261761-91-4), molecular formula C6H5ClN2O4S and molecular weight 236.63 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, 2-Chloro-3-nitrobenzenesulfonamide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 236.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C6H5ClN2O4S |
| Molecular Weight | 236.63 g/mol |
| Purity | >95% |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 4-Chloro-6-fluoro-7-methoxyquinoline-3-carbonitrile (CAS 1017788-78-1)
- 4-Chloro-6-fluoro-8-methoxyquinoline-3-carbonitrile (CAS 1247810-29-2)
- 4-Chloro-2-nitrobenzene-1-sulfonamide (CAS 13852-81-8)
- 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carbonitrile 3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarbonitrile 175204-41-8 (CAS 175204-41-8)
- 4-Chloro-8-fluoro-6-methoxyquinoline-3-carbonitrile (CAS 1823500-08-8)
- 2-Chloro-4-nitrobenzenesulfonamide (CAS 31150-99-9)
- 2-Chloro-5-nitrobenzenesulfonamide (CAS 96-72-0)
- 2-Chloro-5-sulfobenzoic acid (CAS 40284-70-6)
Recommended Standards
- Hydrochlorothiazide Impurity 29 (CAS 957785-35-2)
- Diphenylphosphinic Chloride (CAS 1499-21-4)
- 8-chloro-4-fluoro-1-methyl-imidazo[4,5-g]quinazoline (CAS 2769820-62-2)
- 7-CHLORO-6-(TRIFLUOROMETHYL)BENZO[B]THIOPHENE (CAS 1446401-37-1)
- Ethyl 5-bromo-7-(tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1-benzofuran-2-carboxylate (CAS 2377587-57-8)
- 3-Hydroxy-6-(trifluoromethyl)picolinamide (CAS 1803803-17-9)
- 4-Amino-3-methyl-1-phenylbutan-2-ol (CAS 1503642-29-2)
- Sitagliptin Impurity 118 (CAS 1261633-32-2)
- Cerium hydroxide (Ce(OH)3) (CAS 15785-09-8)
- 2-Amino-3-methylpentanamide (CAS 26433-54-5)
- (S)-1-(Pyrimidin-4-yl)ethanamine (CAS 66007-69-0)
- Tellurium ICP Standard (CAS 13494-80-9)
- 3-(5-Ethyl-1,3,4-oxadiazol-2-yl)piperidine hydrochloride (CAS 1707580-46-8)
- Semaglutide-d5 (CAS CATO-C4X-2226153)
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