What is the chemical name of transformer oil used in power transformers?

The chemical name of transformer oil used in power transformers is mineral oil, specifically a highly refined and purified form of paraffinic or naphthenic hydrocarbons. This mineral oil is characterized by its excellent dielectric properties, thermal stability, and low viscosity, making it suitable for effective insulation and cooling in electrical applications. Additionally, transformer oil may contain additives to enhance its performance and longevity.