Final answer:
Ortho cresol, with the chemical formula C7H8O, is a benzene derivative with adjacent methyl and hydroxyl groups.
Step-by-step explanation:
The formula for ortho cresol, also known as o-cresol, is C7H8O. It is one of the isomers of cresol that has the methyl group and the hydroxyl group attached to adjacent carbon atoms on the benzene ring. This compound is commonly used in disinfectants and as a precursor to various chemicals. Ortho cresol's molecular structure includes a benzene ring with a hydroxyl (-OH) group at one position and a methyl group (CH3) at the adjacent position.