4-Chloro-3,5-dimethylbenzoic acid(CAS: 90649-78-8)

4-Chloro-3,5-dimethylbenzoic acid is a white crystalline solid with a molecular weight of 210.02 g/mol. It has a pKa of 4.28 and is slightly soluble in water. This compound is reactive towards nucleophiles and acidic conditions. It has a melting point of 204-208°C and is soluble in common organic solvents like ethanol and acetone.

4-Chloro-3,5-dimethylbenzoic acid can be synthesized by reacting 3,5-dimethylbenzoic acid with thionyl chloride in the presence of a solvent such as toluene. This process provides good yield and selectivity, with the final product isolated by recrystallization. The reaction is carried out under mild conditions and requires careful handling due to the presence of chlorides.

4-Chloro-3,5-dimethylbenzoic acid is used in various industries, including pharmaceuticals, where it serves as a precursor for the synthesis of other compounds. It is also utilized in the manufacturing of dyes and pigments, as a chemical intermediate in the synthesis of polymers, and in the development of sensors and semiconductors. Its use in these industries highlights its versatility and reactivity.

When handling 4-Chloro-3,5-dimethylbenzoic acid, it is important to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work should be conducted in a fume hood to minimize exposure to hazardous fumes. Spills should be handled with care, using absorbent materials, and the area should be thoroughly cleaned. Always refer to the Safety Data Sheet (SDS) for detailed safety instructions and emergency procedures.