6:2 FluorotelomerEthoxylates in Human Serum and ResidentialHomes: A Growing Environmental Health Concern

As an emerging group of per- and polyfluoroalkyl substances (PFAS), fluorotelomer ethoxylates (FTEOs) are widely employed as a major ingredient in antifog products. However, knowledge about their environmental distribution and human exposure remains scarce. Herein, we reported the ubiquitous detection of 6:2 FTEO homologues in popular antifog products (<i>n</i> = 47), indoor dust from residential homes (<i>n</i> = 80), and serum of pregnant women (<i>n</i> = 90) living in South China, demonstrating broad use and widespread human exposure. The cumulative concentrations of 6:2 FTEOs ranged from below the limit of detection (