Hydrofluoroether HFE-449mec-f, chemical formula of C5H3F9O, is widely used in electronic precision cleaning, electronic component leak test liquid or air tightness test liquid, insulating liquid, heat conduction liquid, solvent thinner, and many more. HFE-449 has excellent properties such as excellent inertness, high density, low viscosity, low surface tension, low dielectric constant, non-flammable, non-toxic, non-residue, and other characteristics.