5-Ethylthiophene-2-sulfonyl chloride CAS 56921-00-7
| CAS No. | 56921-00-7 |
| Molecular Formula | C6H7ClO2S2 |
| Molecular Weight | 210.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Ethylthiophene-2-sulfonyl chloride (CAS 56921-00-7), a certified reference material (molecular formula C6H7ClO2S2, MW 210.70 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 5-Ethylthiophene-2-sulfonyl chloride is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 210.70 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.
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 | C6H7ClO2S2 |
| Molecular Weight | 210.70 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Ethylthiophene Standards
- 5-Ethylthiophene-3-sulfonyl chloride (CAS 1245823-95-3)
- 5-Ethylthiophene-2-sulfonohydrazide (CAS 78380-36-6)
- 3-(N-Ethylthiophene-2-carboxamido)propanoic acid (CAS 1178078-63-1)
- 5-Ethylthiophene-2-sulfonamide (CAS 140646-34-0)
- N-Ethylthiophene-2-sulfonamide (CAS 358666-45-2)
- Ethyl 3-ethylthiophene-2-carboxylate (CAS 132039-43-1)
- Ethyl 5-ethylthiophene-3-carboxylate (CAS 19163-51-0)
- Ethyl 5-ethylthiophene-2-carboxylate (CAS 773135-08-3)
Recommended Standards
- 5-Chloro-2,2,4,6-tetramethyl-2,3-dihydrobenzofuran (CAS 63577-98-0)
- 6-Chloro-1-oxo-1-phenylhexane (CAS 946-01-0)
- 5-Chloro-2-(piperidin-1-yl)aniline (CAS 412308-45-3)
- 9-Chloro-7-methyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-amine (CAS 886367-74-4)
- 2-Chloro-5-cyclopropyl-7-methoxyquinazolin-4(3H)-one (CAS 601514-53-8)
- dimethyl (methylenebis(4,1-phenylene))dicarbamate (CAS 7450-63-7)
- N-(quinolin-5-ylcarbamothioyl)benzamide (CAS 861208-64-2)
- (3S)-Dihydro-3-[(tetrahydro-2H-pyran-2-yl)oxy]-2(3H)-furanone (CAS 83680-34-6)
- tert-butyl N-imidazo[1,5-a]pyridin-8-ylcarbamate (CAS 697739-14-3)
- 2-Fluoro-N,N-dimethylaniline (CAS 393-56-6)
- 3-((2,3-Dichlorophenoxy)methyl)-4-methoxybenzohydrazide (CAS 438218-58-7)
- (S)-1-(3,4-difluorophenyl)-2,2-dimethylpropan-1-amine (CAS 1388099-95-3)
- 1-(Pyridin-4-yl)pyrazolidine-3,5-dione (CAS 820238-79-7)
- Semaglutide Impurity 121 X Sodium Salt (CAS CATO-C4X-2226121)
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