3-Methoxythiophene CAS#17573-92-1 Product Description
3-Methoxythiophene is a sulfur-containing heterocyclic organic compound with the molecular formula C₅H₆OS and a molecular weight of 114.17 g/mol. It typically occurs as a clear, light-brown liquid with distinctive physical and chemical properties. Its melting point is reported to be 49–50°C when crystallized from an ethyl ether/ligroine solvent system, while its boiling point ranges from 80 to 82°C under a reduced pressure of 65 mmHg. Owing to its unique molecular structure and versatile chemical reactivity, 3-Methoxythiophene serves as an important intermediate and building block in organic synthesis. It has applications in various industrial and chemical fields, particularly in the development and production of pesticides, pharmaceutical compounds, and fragrance-related products.

3-Methoxythiophene CAS#17573-92-1 Chemical Properties
| Melting point | 49-50 °C(Solv: ethyl ether (60-29-7); ligroine (8032-32-4)) |
| Boiling point | 80-82 °C/65 mmHg (lit.) |
| density | 1.143 g/mL at 25 °C (lit.) |
| refractive index | n20/D 1.532(lit.) |
| Fp | 121 °F |
| storage temp. | Keep in dark place,Inert atmosphere,2-8°C |
| form | Liquid |
| color | Clear light brown |
| Sensitive | Air Sensitive |
| BRN | 106404 |
| LogP | 1.810 (est) |
| CAS DataBase Reference | 17573-92-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Thiophene, 3-methoxy-(17573-92-1) |
3-Methoxythiophene CAS#17573-92-1 Safety Information
| Risk Statements | 10 |
| Safety Statements | 16-27-36/37/39 |
| RIDADR | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| F | 13 |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29339900 |
3-Methoxythiophene CAS#17573-92-1 Product Application
3-Methoxythiophene is a valuable heterocyclic building block and an important intermediate in organic synthesis, finding broad applications across several chemical and industrial sectors. It is commonly employed in the preparation and development of agrochemicals, pharmaceutical compounds, fragrance ingredients, and other specialty chemical products. In addition to these applications, 3-Methoxythiophene serves as a key synthetic intermediate in the production of NSK-850, a high-performance herbicide specifically developed for use in paddy fields. Its versatile chemical structure makes it a useful starting material for the synthesis of various functional compounds, highlighting its significance in agricultural and pharmaceutical chemical manufacturing.
