5-bromo-4-fluorobenzo[d][1,3]dioxole; CAS No.: 1226808-75-8; 5-bromo-4-fluorobenzo[d][1,3]dioxole. PROPERTIES: 5-bromo-4-fluorobenzo[d][1,3]dioxole is a crystalline solid. Its molecular formula is C8H4BrFNO2, and the molecular weight is approximately 247.02 g/mol. The compound has a melting point of approximately 120-122 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 benzo[d][1,3]dioxole ring, a bromo group, and a fluoro 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, 5-bromo-4-fluorobenzo[d][1,3]dioxole serves as a valuable intermediate. The bromo group provides a site for substitution or coupling reactions. The fluoro group influences the electronic properties of the aromatic ring. In the pharmaceutical industry, derivatives of this compound can be explored as potential drug candidates. For example, in the development of certain antimicrobial agents, the structure of 5-bromo-4-fluorobenzo[d][1,3]dioxole can be modified to enhance the drug's antimicrobial activity and selectivity (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).