9H-Carbazole-3-sulfonyl chloride CAS 21421-43-2
| CAS No. | 21421-43-2 |
| Molecular Formula | C12H8ClNO2S |
| Molecular Weight | 265.72 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.
CATO supplies 9H-Carbazole-3-sulfonyl chloride (CAS 21421-43-2), a certified reference material (molecular formula C12H8ClNO2S, MW 265.72 g/mol) for analytical method development and quality control.
Structurally, 9H-Carbazole-3-sulfonyl chloride (C12H8ClNO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 265.72 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C12H8ClNO2S |
| Molecular Weight | 265.72 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related H Standards
- 9H-Carbazole, 3-bromo-9-ethenyl-, homopolymer (CAS 32072-08-5)
- 9H-carbazole-2,7-dicarboxylic acid (CAS 1409971-87-4)
- 9H-carbazole-3,6-dicarboxylic acid (CAS 3215-41-6)
- 1,1'-(9H-Carbazole-3,6-diyl)bis(ethan-1-one) (CAS 3403-70-1)
- 1,1'-(9H-Carbazole-3,9-diyl)diethanone (CAS 92855-55-5)
- 9H-Carbazole 3-Oxoacetic Acid (CAS 1094264-08-0)
- Carbazole-3-boronic Acid Pinacol Ester (CAS 855738-89-5)
- Carbazole-9-carbonyl Chloride (CAS 73500-82-0)
Recommended Standards
- 4-Chloro-4-nitrodiphenyl sulfide (CAS 21969-11-9)
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- n-(2-Chloro-6-fluorobenzyl)-2-(methylsulfonyl)ethan-1-amine (CAS 1179830-88-6)
- 2,4-Difluoro-5-(2-fluorophenyl)pyrimidine (CAS 1214346-23-2)
- (2R,3R,4S,5R)-2-(8-((4-Chlorophenyl)thio)-6-(diethylamino)-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol (CAS 55628-45-0)
- 2-(3-aminophenoxy)-N,N-dimethylacetamide (CAS 184944-88-5)
- 4-(Difluoromethyl)-5-fluoro-6-iodopicolinoyl chloride (CAS 1805045-67-3)
- 6-chloro-3-methoxypyrrolo[1,2-a]quinoxaline (CAS 160657-08-9)
- 3-Bromo-5,8-dichloroquinoline (CAS 1447953-21-0)
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