Perfluoro(2-methyl-3-pentanone) is a fluorinated ketone with the structural formula CFCFC(=O)CF(CF), a fully-fluorinated analog of ethyl isopropyl ketone. It is used as an electronics coolant liquid and fire protection fluid sold commercially by 3M under brand names such as Novec 1230, Novec 649, and FK-5-1-12. It is also known as “waterless water” or “dry water”.