What is the chemical composition of transformer oil?

The chemical composition of transformer oil primarily consists of highly refined mineral oils, which are predominantly aliphatic and aromatic hydrocarbons. Typically, transformer oil contains around 90-95% saturated hydrocarbons, with the remaining 5-10% comprising aromatic compounds. Additives such as antioxidants, corrosion inhibitors, and anti-foaming agents may also be included to enhance performance and stability. The specific formulation can vary based on manufacturer specifications and application requirements.