C6H5NO2 is the chemical formula for nitrobenzene, an organic compound consisting of a benzene ring with a nitro group (-NO2) attached. It is a pale yellow liquid with a sweet, almond-like odor and is primarily used in the production of aniline, which is a precursor for dyes, drugs, and plastics. Nitrobenzene is not only important in industrial applications but also has implications for environmental and health safety. It is toxic and can cause harmful effects if inhaled or ingested. Proper handling and disposal are essential to minimize risks associated with exposure to this compound.