5-Methylbenzo[b]thiophen-2(3H)-one CAS 73129-57-4
| CAS No. | 73129-57-4 |
| Molecular Formula | C9H8OS |
| Molecular Weight | 164.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 5-Methylbenzo[b]thiophen-2(3H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
5-Methylbenzo[b]thiophen-2(3H)-one (CAS 73129-57-4), molecular formula C9H8OS and molecular weight 164.22 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8OS, 5-Methylbenzo[b]thiophen-2(3H)-one contains sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 164.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C9H8OS |
| Molecular Weight | 164.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Sulfur Atoms | 1 |
Related Methylbenzo Standards
- 2-Methylbenzo[b]thiophene 1-oxide (CAS 33945-86-7)
- 3-Methylbenzo[b]thiophen-5-ol (CAS 3610-07-9)
- 5-Methylbenzo[b]thiophen-3(2H)-one (CAS 56639-88-4)
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Recommended Standards
- 5-Methyl-1-benzothiophen-3-ol (CAS 65520-23-2)
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- 5-(Methylthio)benzofuran (CAS 60770-65-2)
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- 3,3'-(1,2-Phenylenebis(oxy))bis(propane-1,2-diol) (CAS 56266-47-8)
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- 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)imidazo[1,2-a]pyridine (CAS 1419554-16-7)
- Liraglutide Impurity 21 TFA Salt (CAS CATO-C4X-199221)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com