5-Methoxythiophene-3-carbaldehyde CAS 78395-10-5
| CAS No. | 78395-10-5 |
| Molecular Formula | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methoxythiophene-3-carbaldehyde (CAS 78395-10-5), molecular formula C6H6O2S and molecular weight 142.18 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Methoxythiophene-3-carbaldehyde (C6H6O2S) 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 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 142.18 g/mol, it falls into the low-molecular-weight range. 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.
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 | 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.) | 1979 |
| Sulfur Atoms | 1 |
Related Methoxythiophene Standards
- 3-Methoxythiophene-2-carbaldehyde (CAS 35134-07-7)
- 4-Methoxythiophene-2-carbaldehyde (CAS 98316-32-6)
- 4-Methoxythiophene-3-carbaldehyde (CAS 82069-74-7)
- 3-Methoxythiophene-2-carbonitrile (CAS 57059-18-4)
- 5-Methoxythiophene-2-carbonitrile (CAS 58703-25-6)
- 2-methoxythiophene-3-carbaldehyde (CAS 41057-07-2)
- 4-Methoxythiophene-2-thiol (CAS 1082350-78-4)
- (E)-3-methoxythiophene-2-carbaldehyde oxime (CAS 1824827-05-5)
Recommended Standards
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- 5-Methoxy-2-thiophenecarbaldehyde (CAS 35087-46-8)
- 5-Methyl-6-thioxo-5,6-dihydropyrimidin-4(1H)-one (CAS 89322-74-7)
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