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1-methylpyrazole-4-boronic acid; CAS No.: 847818-55-7; 1-methylpyrazole-4-boronic acid. PROPERTIES: 1-methylpyrazole-4-boronic acid is a crystalline solid. Its molecular formula is C5H6BNO3, and the molecular weight is approximately 137.92 g/mol. The compound has a melting point of approximately 100-102 C. It is moderately soluble in water and organic solvents such as methanol and ethyl acetate. 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 pyrazole ring and a boronic acid 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-methylpyrazole-4-boronic acid serves as a versatile intermediate. The boronic acid group can undergo various reactions such as Suzuki coupling reactions. The pyrazole ring provides unique electronic effects. In the chemical industry, derivatives of this compound can be explored as potential intermediates for the synthesis of various organic compounds. For example, in the development of certain agrochemicals, the structure of 1-methylpyrazole-4-boronic acid can be utilized to design compounds with improved herbicidal activities (as mentioned in agrochemical chemistry literature). Additionally, in the field of materials science, it can be incorporated into the synthesis of functional materials such as polymers or coatings, where its structure can enhance the material's thermal stability and chemical resistance (as described in materials chemistry research papers).