... achromatic color, the odourlessness, do not burn, the volatility is high, is one of stablest organic compounds, when 900°C, ... its tall purely gas and the mixed gas(high-purity Tetrafluoromethane mixed with the high-purity oxygen), can extensively be applied to silicon, silicon ... , in the depth of 275-366 meters, the small white rat is still safe to escape from danger. High purity Carbon Tetrafluoride