3-Hydroxythiophene-2-carboxylic acid CAS 5118-07-0
| CAS No. | 5118-07-0 |
| Molecular Formula | C5H4O3S |
| Molecular Weight | 144.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Hydroxythiophene-2-carboxylic acid.
CATO supplies 3-Hydroxythiophene-2-carboxylic acid (CAS 5118-07-0), a certified reference material (molecular formula C5H4O3S, MW 144.15 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H4O3S, 3-Hydroxythiophene-2-carboxylic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 144.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 3-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.) | 1958 |
| Sulfur Atoms | 1 |
Related Hydroxythiophene Standards
- 5-hydroxythiophene-2-carboxylic acid (CAS 1881320-94-0)
- 4-Hydroxythiophene-2-carboxylic acid (CAS 40748-90-1)
- 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
- 3-Hydroxyisothiazole-5-carboxylate (CAS 62020-63-7)
- 3-Methyl-5-nitroisothiazole (CAS 36778-16-2)
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- 3-Nitrothiophen-2-amine (CAS 80313-09-3)
- 4-Hydroxy-butyrimidicacidethylester (CAS 887579-53-5)
- N-(4-(3-Methoxyphenyl)thiazol-2-yl)butyramide (CAS 536732-07-7)
- 2,2,2-trifluoroethyl N-(quinolin-8-yl)carbamate (CAS 1087798-11-5)
- Betamethasone impurity 104 (CAS CATO-C4X-1437104)
- 4-Amino-1-(methylthio)-[1,2,4]triazolo[4,3-a]quinazolin-5(4H)-one (CAS 112752-65-5)
- 5-(4-Bromo-2-fluorophenoxy)pentanenitrile (CAS 1250980-08-5)
- N-(phenylcarbamothioyl)benzamide (CAS 4921-82-8)
- Ampicillin-d5 (CAS 1426173-65-0)
- 2-(1-Oxo-1,2,3,4-tetrahydroisoquinolin-2-yl)acetic acid (CAS 101301-18-2)
- D-Pro38-Tirzepatide (CAS CATO-CPTD788901)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com