2-Thiophenecarboxylic Acid CAS 527-72-0
| CAS No. | 527-72-0 |
| Molecular Formula | C5H4O2S |
| Molecular Weight | 128.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2-Thiophenecarboxylic Acid (CAS 527-72-0), a certified reference material (molecular formula C5H4O2S, MW 128.15 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, 2-Thiophenecarboxylic Acid is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 128.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H4O2S |
| Molecular Weight | 128.15 g/mol |
| Purity | >95% |
| 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 |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Thiophenecarboxylic Standards
- 2-thiophenecarboxylic acid, 4-amino- 2-thiophenecarboxylicacid,4-amino-(9ci) 4 - Aminothiophene - 2 - carboxylic acid 4-Amino-thiophene-2-carboxylic acid 4-amino-2-thiophenecarboxylic acid 4-aminothiophene-2-carboxylic acid 89499-38-7 (CAS 89499-38-7)
- 2-Ethyl-3-thiophenecarboxylic acid (CAS 77756-28-6)
- 3-Thiophenecarboxylic acid, 5-ethyl-, hydrazide (9CI) 438225-57-1 (CAS 438225-57-1)
- 3-Thiophenecarboxylic acid, 4,5-dimethyl-, hydrazide (9CI) 524934-36-9 (CAS 524934-36-9)
- 3-Thiophenecarboxylic acid n-butyl ester (CAS 317385-62-9)
- 3-Thiophenecarboxylic acid, 5-propyl-, hydrazide (9CI) 438215-42-0 (CAS 438215-42-0)
- 3-Thiophenecarboxylic acid, 5-(1-methylethyl)-, hydrazide (9CI) 438221-49-9 (CAS 438221-49-9)
- 2-Thiophenecarboxylic acid 2-chloro-2,3-dihydro-3-oxo-, methyl ester (CAS 95201-94-8)
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