Methoxy-nonafluorobutane (C4F9OCH3), is a clear, colorless and low-odor fluid. Excellent chemical inertness and thermal conductivity, very good dielectric property, extremely low surface tension, Thinvec 7100 fluid is compatible with most metals , hard polymers and plastic. 61℃ boiling point, low surface tension and 750ppm exposure guidelines (8 hr. time-weighted average) make it ideal for use in many application .