2-Methylthiophene-3-carboxylic Acid CAS 1918-78-1
| CAS No. | 1918-78-1 |
| Molecular Formula | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Methylthiophene-3-carboxylic Acid (CAS 1918-78-1), molecular formula C6H6O2S and molecular weight 142.18 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H6O2S, 2-Methylthiophene-3-carboxylic Acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 142.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 2-Methylthiophene-3-carboxylic Acid 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 | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Methylthiophene Standards
- 4-Methylthiophene-2-carboxylic acid (CAS 14282-78-1)
- 5-Methylthiophene-3-carboxylic Acid (CAS 19156-50-4)
- 4-Methylthiophene-2-boronic Acid (CAS 162607-15-0)
- 5-Methylthiophene-2-boronic Acid (CAS 162607-20-7)
- 5-Methylthiophene-3-boronic acid (CAS 930303-82-5)
- 2-Methylthiophene-3-carboxamide (CAS 189329-96-2)
- 4-Methylthiophene-3-carboxamide (CAS 189330-32-3)
- (E)-5-methylthiophene-2-carbaldehyde oxime (CAS 42456-40-6)
Recommended Standards
- 6-methyl-2-sulfanylidene-1,2,3,4-tetrahydropyrimidin-4-one (CAS 1956-04-2)
- 1-methyl-1H-1,2,3-triazole-4-carbothioamide (CAS 1849225-56-4)
- (R)-2-(Vinylsulfinyl)furan (CAS 646516-48-5)
- 4-formylthiazole-2-carbonitrile (CAS 1824628-02-5)
- Ethyl 4H-1,2,4-triazole-4-carboxylate (CAS 83784-81-0)
- Ethyl 1-Cbz-3-fluoropiperidine-3-carboxylate (CAS 1111640-60-8)
- Cobalt(II)carbonate (CAS 513-79-1)
- 4-(1-Isopropylpiperidin-4-yl)aniline (CAS 837421-92-8)
- (4-(Benzyloxy)-3-methylphenyl)methanol (CAS 1898255-67-8)
- N-Butyl-4-chloro-N-(6-morpholin-4-yl-3-nitro-4-trifluoromethyl-pyridin-2-yl)-benzamide (CAS 1311279-92-1)
- (2R,3S,4R,5R)-2-(Hydroxymethyl)-5-(6-(((12-methyltetraphen-7-yl)methyl)amino)-9H-purin-9-yl)tetrahydrofuran-3,4-diol (CAS 94617-18-2)
- 3,5,8-Trichloropyrido[2,3-d]pyridazine (CAS 39225-62-2)
- Peimisine (CAS 19773-24-1)
- Semaglutide238 (CAS CATO-C4X-2226238)
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