4,5-Dibromothiophene-2-sulfonyl chloride CAS 81606-31-7
| CAS No. | 81606-31-7 |
| Molecular Formula | C4HBr2ClO2S2 |
| Molecular Weight | 340.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4,5-Dibromothiophene-2-sulfonyl chloride (CAS 81606-31-7) is a high-purity analytical reference standard with the molecular formula C4HBr2ClO2S2 and a molecular weight of 340.44 g/mol.
Structurally, 4,5-Dibromothiophene-2-sulfonyl chloride (C4HBr2ClO2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 340.44 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 4,5-Dibromothiophene-2-sulfonyl chloride 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.
Physical & Chemical Properties
| Molecular Formula | C4HBr2ClO2S2 |
| Molecular Weight | 340.44 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| 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.) | 1980 |
| Halogen Content | Cl/Br-containing |
| Sulfur Atoms | 2 |
Related Dibromothiophene Standards
- 3,4-Dibromothiophene-2-sulfonyl chloride (CAS 128852-15-3)
- 2,5-Dibromothiophene-3-sulfonyl chloride (CAS 70374-40-2)
- 2,5-Dibromothiophene-3,4-dicarboxylic Acid (CAS 190723-12-7)
- 2,5-Dibromothiophene-3-sulfonamide (CAS 7182-36-7)
- 4,5-Dibromothiophene-2-sulfonamide (CAS 77893-69-7)
- Ethyl 3,4-dibromothiophene-2-carboxylate (CAS 153562-67-5)
- Ethyl 4,5-dibromothiophene-3-carboxylate (CAS 1823905-03-8)
- Ethyl 2,5-dibromothiophene-3-carboxylate (CAS 289470-44-6)
Recommended Standards
- 3,4-dibromo-4-(4-chlorophenyl)-2-butanone (CAS 343375-52-0)
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- 3-(4-tert-Butylphenyl)-5-(2-methanesulfinylphenyl)-1,2,4-oxadiazole (CAS 339099-77-3)
- 5-Diethylsulfamoyl-2-piperidin-1-yl-benzoic acid (CAS 37093-42-8)
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- (3-Amino-8-chloroquinolin-5-yl)methanol (CAS 1207187-34-5)
- 4-[(1S)-1-(Boc-amino)ethyl]benzoic acid (CAS 1014644-95-1)
- Cyclohexyl(4-methylphenyl)methanone (CAS 2789-44-8)
- 2-Bromo-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine (CAS 2223011-74-1)
- (3-Methyl-4-(piperidin-1-ylsulfonyl)phenyl)boronic acid (CAS 2377608-49-4)
- methyl 3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxylate (CAS 4415-09-2)
- Des-Gly34-Tirzepatide (CAS CATO-CPTD788940)
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