4-Chloro-n-ethyl-3-nitrobenzenesulfonamide CAS 43041-67-4
| CAS No. | 43041-67-4 |
| Molecular Formula | C8H9ClN2O4S |
| Molecular Weight | 264.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chloro-n-ethyl-3-nitrobenzenesulfonamide (CAS 43041-67-4), molecular formula C8H9ClN2O4S and molecular weight 264.69 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H9ClN2O4S, 4-Chloro-n-ethyl-3-nitrobenzenesulfonamide contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 264.69 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H9ClN2O4S |
| Molecular Weight | 264.69 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 |
| 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.) | 1969 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-N,N-dimethyl-5-nitrobenzenesulfonamide (CAS 10372-90-4)
- 4-Chloro-N,N-dimethyl-3-nitrobenzene-1-sulfonamide (CAS 137-47-3)
- 5-Chloro-1-((2S,5R)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl)pyrimidine-2,4(1H,3H)-dione (CAS 137530-46-2)
- 5-Chloro-2-methoxy-3-sulfamoylbenzamide (CAS 1490911-67-5)
- 2-(4-Chloro-2-sulfamoylphenoxy)acetamide (CAS 4527-62-2)
- 2-Chloro-6-(pyrimidin-2-ylthio)-1H-purine (CAS 646509-53-7)
- 2-Chloro-N-ethyl-5-nitrobenzenesulfonamide (CAS 477482-96-5)
- 4-Chloro-5-sulfamoylanthranilic Acid Methyl Ester (CAS 3994-89-6)
Recommended Standards
- 5-Amino-1-(2-chloro-4-fluoro-5-methylphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (CAS 2197063-12-8)
- 3-{[(6-chloropyridin-3-yl)sulfonyl]amino}propanoic acid (CAS 929974-15-2)
- Fosaprepitant Impurity 874 (CAS 538-37-4)
- 3-(2-Chloropyridine-3-sulfonamido)propanoic acid (CAS 929975-48-4)
- (1-Benzofuran-4-yl)methanol (CAS 173470-67-2)
- 4,8-Dichloro-5-methoxy-2-propylquinoline (CAS 1189105-73-4)
- 6-Fluoro-1-methoxy-7-methylisoquinoline (CAS 1202006-85-6)
- (S)-3-Aminohex-5-ynoic acid (CAS 270596-46-8)
- Leuprorelin Impurity 53 (CAS CATO-C4X-182253)
- 5-(1-Hydroxyethyl)furan-2-carboxylic acid (CAS 179871-04-6)
- 8-Iodooct-1-ene (CAS 38380-55-1)
- N-(4-(N-(2-Oxo-1,2,3,4-tetrahydroquinolin-6-yl)sulfamoyl)phenyl)butyramide (CAS 922134-00-7)
- Octaethyl 2,2',2'',2''',2'''',2''''',2'''''',2'''''''-((15,35,55,75,95,115,135,155-octa-tert-butyl-1,3,5,7,9,11,13,15(1,3)-octabenzenacyclohexadecaphane-12,32,52,72,92,112,132,152-octayl)octakis(oxy))octaacetate (CAS 92003-63-9)
- Hexapeptide-1 (CAS CATO-CPTD788821)
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