3-Methylthiophene-2,5-dicarboxylic acid CAS 89677-40-7
| CAS No. | 89677-40-7 |
| Molecular Formula | C7H6O4S |
| Molecular Weight | 186.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-Methylthiophene-2,5-dicarboxylic acid (CAS 89677-40-7) is a high-purity analytical reference standard with the molecular formula C7H6O4S and a molecular weight of 186.19 g/mol.
Structurally, 3-Methylthiophene-2,5-dicarboxylic acid (C7H6O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 186.19 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C7H6O4S |
| Molecular Weight | 186.19 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Sulfur Atoms | 1 |
Related Methylthiophene Standards
- 5-Methylthiophene-2,3-dicarboxylic Acid (CAS 46029-22-5)
- 4-Ethyl-5-methylthiophene-3-carbohydrazide (CAS 438225-41-3)
- 5-ethyl-4-methylthiophene-2-carbohydrazide (CAS 851169-15-8)
- 4-Ethyl-5-methylthiophene-3-carbonyl chloride (CAS 1160248-82-7)
- 3-Methylthiophene-2-sulfonic acid (CAS 1159877-58-3)
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- 5-Methylthiophene-2-sulfonamide (CAS 53595-69-0)
Recommended Standards
- 3-(Methylthio)-6-oxo-1,6-dihydro-1,2,4-triazine-5-carboxamide (CAS 96259-33-5)
- 3-Sulfobenzaldehyde (CAS 98-45-3)
- 4-Hydroxy-2-(methylthio)pyrimidine-5-carboxylic acid (CAS 397308-78-0)
- 3-Ureidothiophene-2-carboxylic acid (CAS 213390-50-2)
- n-(3-nItrophenyl)sulfamide (CAS 70466-79-4)
- TPBM (CAS 6466-43-9)
- 1217862-57-1 3-Cyclopropyl-4-methyl-4H-1,2,4-triazole DTXSID20673674 (CAS 1217862-57-1)
- 6-bromo-5-hydroxyisoindolin-1-one (CAS 1373223-17-6)
- 5-Amino-1-(2,3-dihydroxypropyl)-1H-pyrazole-4-carboxylic acid (CAS 157436-82-3)
- (R)-5-((tert-Butoxycarbonyl)amino)-2-methylpentanoic acid (CAS 1352407-82-9)
- 2-{[(tert-butoxy)carbonyl](methyl)amino}-3-phenylpropanoic acid (CAS 64263-83-8)
- tert-Butyl 4-(2-aminoethyl)piperazine-1-carboxylate oxalate (CAS 2034154-90-8)
- 2-(1-(2-Chlorophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl)acetic acid (CAS 1015844-43-5)
- Semaglutide impurity 206 (CAS CATO-C4X-2226206)
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