Isododecane consists of 99.5% of permethylated C12 isoparaffins, the main isomer being 2,2,4,6,6-pentamethylheptane (typically 85%). Due to its synthetic origins, Isododecane is free of aromatics, sulphur containing molecules and polar compounds. It has low odour and very low toxicity. The high methyl-branching level of Isododecane renders it particularly resistant to chemical attack or thermal degradation. Additionally, Isododecane has a very wide operating range both in terms of pressure and temperature.