2-Carboxythiophene-3-boronic acid CAS 5503-74-2
| CAS No. | 5503-74-2 |
| Molecular Formula | C5H5BO4S |
| Molecular Weight | 171.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Carboxythiophene-3-boronic acid is closely related to a carbohydrate-derived structure, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-Carboxythiophene-3-boronic acid (CAS 5503-74-2), molecular formula C5H5BO4S and molecular weight 171.97 g/mol, is a CATO reference standard with documented purity and traceability.
2-Carboxythiophene-3-boronic acid (C5H5BO4S) contains a carbohydrate-derived structure, a sulfone group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
CATO manufactures 2-Carboxythiophene-3-boronic 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 | C5H5BO4S |
| Molecular Weight | 171.97 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Carboxythiophene Standards
Recommended Standards
- 2-Boronothiophene-3-carboxylic acid (CAS 519054-53-6)
- (4-Oxo-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl)boronic acid (CAS 125177-38-0)
- 2-Bromo-1H-imidazole-5-carbonitrile (CAS 1067894-55-6)
- (2-Carbamoylthiazol-5-yl)boronic acid (CAS 1190875-33-2)
- N,N'-Bis(2-pyridylmethyl)-1,2-ethylenediamine tetrahydrochloride dihydrate (CAS 1310544-60-5)
- Ethyl 6-(4-methoxy-3-nitrophenyl)-6-oxohexanoate (CAS 898758-93-5)
- (2-Isocyanatoethoxy)benzene (CAS 4747-92-6)
- 3-(3-(4-((Pyridin-2-yloxy)methyl)benzyl)isoxazol-5-yl)pyridin-2-amine (CAS 936339-60-5)
- (3-Chloronaphthalen-2-yl)methanol (CAS 99852-39-8)
- (3R,4R)-rel-4-isopropylpyrrolidine-3-carboxylic acid hydrochloride (CAS 1330750-36-1)
- Dimethyl (3-chloro-2-oxopropyl)phosphonate (CAS 60378-99-6)
- 2-(4-Fluoro-benzenesulfonyl)-1,2,3,4-tetrahydro-isoquinoline-3-carboxylic acid (CAS 475041-45-3)
- 1-Benzyl-4-((2,5-dichlorophenyl)sulfonyl)piperazine (CAS 312282-17-0)
- Semaglutide impurity 30 (CAS CATO-C4X-222630)
Why CATO?
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