2,4-Difluoro-3-methylbenzoic acid(CAS: 112857-68-8)

2,4-Difluoro-3-methylbenzoic acid is a crystalline solid with a molecular weight of approximately 192.04 g/mol. It has a melting point around 145-147°C. The compound is slightly soluble in water but soluble in common organic solvents like ethanol and acetone. Chemically, it is relatively stable but can undergo esterification reactions. It is also sensitive to strong bases and reducing agents.

2,4-Difluoro-3-methylbenzoic acid can be synthesized via the electrophilic fluorination of 3-methylbenzoic acid in the presence of a Lewis acid catalyst such as aluminum chloride. The reaction is typically conducted in an inert solvent like dichloromethane. The yield is usually around 80-85%, and the selectivity for the 4-position fluorination is high.

2,4-Difluoro-3-methylbenzoic acid is primarily used in the pharmaceutical industry as an intermediate for synthesizing various drugs. It also finds application in the polymer industry for modifying the properties of polymers and in the sensor industry for developing chemical sensors. Additionally, it is used in the semiconductor industry for etching applications.

Proper personal protective equipment (PPE) should be worn when handling 2,4-difluoro-3-methylbenzoic acid, including gloves, safety goggles, and a lab coat. This compound should be handled in a well-ventilated area or fume hood to avoid inhalation of any vapors. Spills should be cleaned up using appropriate absorbent materials and disposed of according to local regulations. Always refer to the Safety Data Sheet (SDS) for detailed safety information.