4-Hydroxythiophene-2-carboxylic acid CAS 40748-90-1
| CAS No. | 40748-90-1 |
| Molecular Formula | C5H4O3S |
| Molecular Weight | 144.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 144.15 g/mol gives 4-Hydroxythiophene-2-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Hydroxythiophene-2-carboxylic acid (CAS 40748-90-1), a certified reference material (molecular formula C5H4O3S, MW 144.15 g/mol) for analytical method development and quality control.
4-Hydroxythiophene-2-carboxylic acid (C5H4O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. 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).
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 4-Hydroxythiophene-2-carboxylic 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 | C5H4O3S |
| Molecular Weight | 144.15 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1968 |
| Sulfur Atoms | 1 |
Related Hydroxythiophene Standards
- 5-hydroxythiophene-2-carboxylic acid (CAS 1881320-94-0)
- 3-Hydroxythiophene-2-carboxylic acid (CAS 5118-07-0)
- 4-Hydroxythiophene-3-carboxylic acid (CAS 50624-50-5)
- 3-Hydroxythiophene-2-carboxamide (CAS 57059-24-2)
- 2-Acetyl-3-hydroxythiophene (CAS 5556-07-0)
- N-Hydroxythiophene-2-carboximidamide (CAS 53370-51-7)
- Methyl 5-hydroxythiophene-2-carboxylate (CAS 107433-27-2)
- Methyl 4-hydroxythiophene-3-carboxylate (CAS 65369-21-3)
Recommended Standards
- 4-Aminoisothiazole-3-carboxylic acid (CAS 462067-90-9)
- 3-Nitrothiophen-2-amine (CAS 80313-09-3)
- 4-Methoxy-1,2,5-thiadiazole-3-carbaldehyde (CAS 78741-15-8)
- 3-Methyl-5-nitroisothiazole (CAS 36778-16-2)
- N-Methyl-2-(pyridin-3-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinazolin-4-amine (CAS 1417301-02-0)
- 2-(Benzylthio)-5-((4-nitrobenzyl)thio)-1,3,4-thiadiazole (CAS 477330-55-5)
- (1,2,3,4-Tetrahydroquinolin-2-yl)methanamine (CAS 84393-46-4)
- 3-((2,5-Dimethoxyphenyl)sulfonyl)-2H-chromen-2-one (CAS 866346-80-7)
- Tetraethyl 1,1'-(1,4-phenylene)bis(2,5-dimethyl-1H-pyrrole-3,4-dicarboxylate) (CAS 83607-08-3)
- Hexa-2,4-dienoic acid (CAS 22500-92-1)
- 2-(5-Amino-3-(2-methylfuran-3-yl)-1H-pyrazol-1-yl)ethan-1-ol (CAS 956751-81-8)
- 6-Tert-Butyl-3H-Thieno[2,3-D]Pyrimidin-4-One (CAS 439692-54-3)
- 4-[(4-Chlorophenyl)sulfanyl]-5H-pyrimido[5,4-b]indole (CAS 320420-19-7)
- Ac-(5-31)Semaglutide (CAS CATO-C4X-2226279)
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