Cresylic acid, also known as cresol, is a mixture of phenolic compounds derived from coal tar or produced during the distillation of crude oil. It typically contains three isomers: ortho-cresol, meta-cresol, and para-cresol. This colorless to yellowish liquid has a distinct odor and is used in various industrial applications, including disinfectants and antiseptics. In addition to its use in cleaning products, cresylic acid serves as a precursor for the synthesis of other chemicals, such as resins and dyes. It is also utilized in the production of certain pharmaceuticals and as a solvent in laboratories. Proper handling is essential due to its toxic and corrosive nature.