2-Methoxythiophene-3-carboxylic acid CAS 71154-29-5
| CAS No. | 71154-29-5 |
| Molecular Formula | C6H6O3S |
| Molecular Weight | 158.18 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 2-Methoxythiophene-3-carboxylic acid.
2-Methoxythiophene-3-carboxylic acid (CAS 71154-29-5), molecular formula C6H6O3S and molecular weight 158.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Methoxythiophene-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 158.18 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.
As a certified reference material (CRM), 2-Methoxythiophene-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 | C6H6O3S |
| Molecular Weight | 158.18 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Sulfur Atoms | 1 |
Related Methoxythiophene Standards
- 3-Methoxythiophene-2-carboxylic acid (CAS 60166-83-8)
- 4-Methoxythiophene-2-carboxylic Acid (CAS 77133-27-8)
- 4-Methoxythiophene-3-carboxylic Acid (CAS 71050-40-3)
- 4-Methoxythiophene-2-boronic acid (CAS 1321901-82-9)
- 3-Methoxythiophene-2-boronic acid (CAS 162607-22-9)
- (E)-3-methoxythiophene-2-carbaldehyde oxime (CAS 1824827-05-5)
- 3-Methoxythiophene-2-carboxamide (CAS 78031-17-1)
- 4-Methoxythiophene-3-carboxamide (CAS 65369-29-1)
Recommended Standards
- 2-Hydroxy-2-(thiophen-3-yl)acetic acid (CAS 22098-20-0)
- 3-(Aminomethyl)-1,2,4-thiadiazole-5-carboxamide (CAS 2417722-33-7)
- 2-Hydroxy-2-(thiophen-2-yl)acetic acid (CAS 53439-38-6)
- 3-fluoro-6-hydrazino-pyridine-2-carbonitrile (CAS 2138519-11-4)
- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(3-chlorophenyl)propanoic acid (CAS 678991-65-6)
- 2-chloro-4,7-dimethoxy-1H-benzo[d]imidazole (CAS 7711-54-8)
- 7-Chloro-1-iodoisoquinoline (CAS 1203579-27-4)
- 2-Chloro-6-iodobenzamide (CAS 1261686-40-1)
- 1-Bromo-3-cyclopropoxy-5-methoxybenzene (CAS 1243370-34-4)
- 4-(3-(Pyrrolidine-1-carbonyl)-1H-pyrazol-1-yl)butanoic acid (CAS 1707378-44-6)
- (3-Fluoro-4-(2-fluoropyridin-4-yl)phenyl)methanamine hydrochloride (CAS 1449117-60-5)
- 3-Isobutyl-1-methyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one (CAS 1245643-15-5)
- 4-(2-Phenoxy-ethyl)-morpholine-2-carboxylic acid (CAS 1171916-86-1)
- Acetyl-Tau Peptide (273-284) amide trifluoroacetate salt (CAS 1684399-52-7)
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