Perflouro-4-ethylcyclohexanesulfonate has been primarily used as an additive in hydraulic fluid formulations that are designed to inhibit erosion in hydraulic systems. The use of these hydraulic fluids in commercial aircraft was identified as a likey source of this compound in surface waters and fish in the Great Lakes of Nort America; PFECHS contamination is now being reported internationally. PFECHS itself exists as a pair of cis and trans isomers, but commercial materals also contain substantial percentages of impurities including constitutional isomers that exhibit the same mass-to-charge ratio as PFECHS during mass spectrometric detection. Unfortunately, the use of inadequately characterized reference standards increases the uncertainty associated with the generated data.

Please see the Wellington Reporter dated August 16, 2017 in the Download section of this product for more information.