Abstract
Polyfluoroalkyl phosphate esters (PAPs) are a group of anthropogenic organic fluorinated compounds which have been widely used in many products. Some researchers pointed out that PAPs are precursors of perfluorocarboxylic acids (PFCAs), which are endocrine disrupting compounds. Main objective of this study was to understand behavior of biodegradation products from PAPs in cosmetics under aerobic condition. For two different biodegradation tests, namely, 1) 8:2diPAPs and 2) a foundation which was labeled “C9-15 fluoroalcohol phosphate” were prepared. As a result, the concentrations of 10 diPAPs decreased during both experiments and they were approximated to first-order reactions. Their half-lives were 6~111 h, and when their molecular weights increased, thier half-lives became longer. Mass of the formed PFOA was 4.0±0.4% of input mass of 8:2diPAP. Not only PFCAs but also some kinds of FTCAs, FTOHs were detected, which seemed to be intermediate products of diPAPs. It was suspected that FTOHs with lower molecular weight (5:2sFTOH, 6:2FTOH, 7:2sFTOH) were diffused into the air by aeration.
