What is the chemical formula of the mineral oil used in transformers?

The chemical formula of the mineral oil used in transformers is not a single formula, as mineral oil is a complex mixture primarily composed of aliphatic and aromatic hydrocarbons. However, it typically contains hydrocarbons with carbon numbers ranging from C15 to C50. The general representation can be approximated as CnH2n+2, where n varies based on the specific composition of the mineral oil used in transformers.