Methyl 5-methylthiophene-3-carboxylate CAS 88770-18-7
| CAS No. | 88770-18-7 |
| Molecular Formula | C7H8O2S |
| Molecular Weight | 156.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Methyl 5-methylthiophene-3-carboxylate (CAS 88770-18-7) is a high-purity analytical reference standard with the molecular formula C7H8O2S and a molecular weight of 156.20 g/mol.
Methyl 5-methylthiophene-3-carboxylate (C7H8O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H8O2S |
| Molecular Weight | 156.20 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.) | 1982 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Methyl 5-methylthiophene-2-carboxylate (CAS 19432-69-0)
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- Methyl 3-Methylthiophene-2-carboxylate (CAS 81452-54-2)
- Methyl 4-methylthiophene-2-carboxylate (CAS 28686-90-0)
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Recommended Standards
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- Methyl Phenyl Sulfone (CAS 3112-85-4)
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