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5083626 
Journal Article 
Letter 
Toward a comprehensive global emission inventory of C_4-C_10 perfluoroalkanesulfonic acids (PFSAS) and related precursors: Focus on the life cycle of C_6- and C_10-based products 
Boucher, JM; Cousins, I; Scheringer, M; Hungerbuhler, K; Wang, Z 
2019 
1 
Environmental Science & Technology Letters
EISSN: 2328-8930 
AMER CHEMICAL SOC 
WASHINGTON 
6 
1 
1-7 
English 
WOS:000455557800001 
A first global emission inventory of C-4-C-10 perfluoroalkanesulfonic acids (PFSAs) released during the life cycle of perfluorohexanesulfonyl fluoride (PHxSF)- and perfluorodecanesulfonyl fluoride (PDSF)-based products is presented. This study complements previous research on emissions of PFSAs that focused largely on the life cycle of perfluorooctanesulfonyl fluoride (POSF) and its derivatives. It reviews and integrates existing information about the life cycle of PHxSF, PDSF, and their derivatives; the limited data available in the public domain point to potentially significant global production, uses, and releases of these substances. Between 1958 and 2015, ranges of total emissions of perfluorohexanesulfonic acid (PFHxS) and perfluorodecanesulfonic acid (PFDS) are estimated to be 120-1022 and 38-378 metric tons, respectively. With the new emission estimates as inputs in a global multimedia environmental fate model (CliMoChem), the model-derived environmental concentrations well capture the reported field concentrations, providing strong support for the plausibility of the developed emission inventories. The results highlight the ongoing environmental exposure to these substances and the need for more detailed data in the public domain about their production levels and uses.