Unexpectedly High Concentrations of a Newly Identified Organophosphate Ester, Tris(2,4-di-tert-butylphenyl) Phosphate, in Indoor Dust from Canada

• DOI: 10.1021/acs.est.8b03061
• Publication Date: 2018-08-03T20:06:33Z
• Authors: Runzeng Liu; Scott A. Mabury
• Keywords: Congener

Organophosphate esters (OPEs) represent a group of additives with significant levels production and application to various household industrial products. Given their potential adverse effects on human health, accurate analysis novel OPEs in indoor dust is crucial. In this study, the tris(2,4-di-tert-butylphenyl) phosphate (AO168═O) six well-known were investigated. The seven target detected 100% office home samples, ∑OPEs (sum OPE concentrations) ranging from 2.92 124 μg/g [geometric mean (GM) 12.3 μg/g]. Surprisingly, AO168═O (0.10–11.1 μg/g, GM 1.97 μg/g) was among highest-concentration congeners, contributing 1.36–65.5% (mean 20.7%). dominant congener indicating it an important overlooked previously. also Standard Reference Material 2585 (indoor dust) at elevated concentration 10.9 which significantly higher than concentrations other (0.38–2.17 μg/g). Despite high measured no or could be identified for AO168═O. precursor AO168═O, phosphite, 50% 1.48 ng/g. This study demonstrates that exposure environments greater previously reported. first report occurrence its precursor, hydrolysis products environment.