FS 71 Engineered Fluid, methoxy-nonafluorobutane (C4F9OCH3), is a clear, colorless and low-odor fluid intended to replace ozone-depleting substances (ODSs) and compounds with high global warming potential (GWP) in many applications. Its physical properties are compared with several other ODS replacement fluid candidates in Table 1. This proprietary fluid has zero ozone depletion potential and other favorable environmental properties. It has one of the best toxicological profiles of CFC replacement materials, with a time-weighted average exposure guideline of 750 ppm (eight hour average).
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