5-Bromothiophene-2-sulfonic acid CAS 73348-44-4
| CAS No. | 73348-44-4 |
| Molecular Formula | C4H3BrO3S2 |
| Molecular Weight | 243.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Bromothiophene-2-sulfonic acid (CAS 73348-44-4), molecular formula C4H3BrO3S2 and molecular weight 243.10 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Bromothiophene-2-sulfonic acid (C4H3BrO3S2) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 5-Bromothiophene-2-sulfonic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H3BrO3S2 |
| Molecular Weight | 243.10 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 2 |
Related Bromothiophene Standards
- 3-Bromothiophene-2-sulfonamide (CAS 856352-92-6)
- 4-Bromothiophene-2-sulfonamide (CAS 214342-79-7)
- 5-Bromothiophene-2-sulfonamide (CAS 53595-65-6)
- 5-Bromothiophene-2-sulfonyl fluoride (CAS 108158-00-5)
- ethyl 2-bromothiophene-3-carboxylate (CAS 632325-50-9)
- 3-bromothiophene-2-carbonyl isothiocyanate (CAS 1339908-68-7)
- 5-Acetyl-4-bromothiophene-2-carboxylic acid (CAS 1369239-73-5)
- propyl 5-bromothiophene-3-carboxylate (CAS 1478954-26-5)
Recommended Standards
- 5-Bromo-N-propylpicolinamide (CAS 845305-89-7)
- 6-(Bromomethyl)-2,4-dimethyl-5,6-dihydrofuro[2,3-d]pyrimidine (CAS 78304-56-0)
- 5-Bromo-N-isopropylpicolinamide (CAS 845305-90-0)
- 6-(Bromomethyl)-3,4-dihydro-2h-1,5-benzodioxepine (CAS 499770-96-6)
- 2-((1-Oxo-1-ureidopropan-2-yl)thio)benzoic acid (CAS 949995-11-3)
- 4-Chloro-2-(difluoromethyl)-5-methoxypyridine (CAS 1804755-25-6)
- 1,3-Bis(1-hydroxy-2,2,2-trichloroethyl)urea (CAS 116-52-9)
- 2-Amino-3-(methylamino)-1,2,4-triazin-5(2H)-one (CAS 89569-70-0)
- Trimethylarsine (CAS 593-88-4)
- 1-phenyl-2-sulfanylethan-1-ol (CAS 28713-50-0)
- 5-Hydroxymethyl-2-methylpyridine (CAS 34107-46-5)
- 1-(4-Chlorophenyl)prop-2-en-1-ol (CAS 58824-54-7)
- (3-Chlorobenzo[b]thiophen-2-yl)(pyrrolidin-1-yl)methanone (CAS 289494-19-5)
- Neuropeptide Y (2-36), amide, porcine (CAS 102961-52-4)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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