Phenylacetone is an organic compound with the chemical formula C9H10O. It appears as a colorless to pale yellow liquid and has a sweet, floral odor. This compound is primarily used in the synthesis of various pharmaceuticals and is a key intermediate in the production of amphetamine and other related substances. In addition to its pharmaceutical applications, phenylacetone is also utilized in the fragrance industry and as a solvent in some chemical processes. Due to its potential use in the illicit production of drugs, it is regulated in many countries, requiring special permits for its purchase and use.