Joudan, ShiraDe Silva, Amila O.Young, Cora2023-02-272023-02-272021-10-01Joudan, S.; De Silva, A. O.; Young, C. J. Insufficient Evidence for the Existence of Natural Trifluoroacetic Acid. Environmental science: processes & impacts. 2021, 23(11), 1641–1649. DOI: 10.1039/d1em00306b2050-7895https://doi.org/10.1039/D1EM00306Bhttp://hdl.handle.net/10315/40884Trifluoroacetic acid (TFA) is a persistent and mobile pollutant that is present ubiquitously in the environment. As a result of a few studies reporting its presence in pre-industrial samples and a purported unaccounted source, TFA is often claimed to exist naturally. Here, we examine the evidence for natural TFA by: (i) critically evaluating measurements of TFA in pre-industrial samples; (ii) examining the likelihood of TFA formation by hypothesized mechanisms; (iii) exploring other potential TFA sources to the deep ocean; and (iv) examining global budgets of TFA. We conclude that the presence of TFA in the deep ocean and lack of closed TFA budget is not sufficient evidence that TFA occurs naturally, especially without a reasonable mechanism of formation. We argue the paradigm of natural TFA should no longer be carried forward.enThis document is the unedited Author’s version of a Submitted Work that 1 was subsequently accepted for publication in Environmental Science: Processes and Impacts, copyright © Royal Society of Chemistry after peer review. To access the final edited and published work see https://pubs.rsc.org/en/content/articlelanding/2021/em/d1em00306b#!divAbstractArticle