Suggested Use and Prohibitions: Desiccants,solvent and polyols applications. Triethylene glycol(TEG) is a colorless, viscous liquid with a slight odor. It is non-flammable, mildly toxic, and considered non-hazardous. TEG is a member of homologous series of dihydroxy alcohols. It is used as a plasticizer for vinyl polymers as well as in the manufacture of air sanitizer and other consumer products.