Hydrogenated terphenyl is one of the best liquid phase high temperature heat transfer oils with excellent thermal stability, oxidation resistance and low vapor pressure. It is a liquid phase heat transfer oil for heat transfer at high temperatures, and it can provide reliable operation for several years even at a temperature of 345 °C. In 2013, our company's hydrogenated terphenyl passed the thermal stability test of China Special Equipment Inspection and Research Institute at 350 °C.