1-(5-methylthiophen-2-yl)ethan-1-one; CAS No.: 13679-74-8; 1-(5-methylthiophen-2-yl)ethan-1-one. PROPERTIES: 1-(5-methylthiophen-2-yl)ethan-1-one is a crystalline solid. Its molecular formula is C8H8OS, and the molecular weight is approximately 164.22 g/mol. The compound has a melting point of approximately 60-62 C. It is moderately soluble in common organic solvents such as methylene chloride and ethyl acetate, but is poorly soluble in water. For proper storage, it should be kept in a sealed container at room temperature, away from heat and direct sunlight. As a compound containing a thiophene ring and a ketone group, it may exhibit certain reactivity and stability. When handling it, protective gloves and eye protection should be worn. In case of accidental contact with skin or eyes, immediate rinsing with water is necessary. APPLICATIONS: In organic synthesis, 1-(5-methylthiophen-2-yl)ethan-1-one serves as a versatile intermediate. The ketone group can undergo various reactions such as nucleophilic addition, reduction, and condensation. The thiophene ring provides unique electronic effects. In the pharmaceutical industry, derivatives of this compound can be explored as potential drug candidates. For example, in the development of certain anti-inflammatory drugs, the structure of 1-(5-methylthiophen-2-yl)ethan-1-one can be modified to enhance the drug's efficacy and reduce side effects (as reported in medicinal chemistry journals). Additionally, in the field of materials science, it can be incorporated into the synthesis of functional materials such as liquid crystals or organic semiconductors, where its structure can influence the material's electronic and optical properties (as noted in materials chemistry research papers).