Cyclic siloxanes in air, including identification of high levels in Chicago and distinct diurnal variation.

ABSTRACT: The organosilicon compounds octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6) are high production volume chemicals that are widely used in household goods and personal care products. Due to their prevalence and chemical characteristics, cyclic siloxanes are being assessed as possible persistent organic pollutants. D4, D5, and D6 were measured in indoor and outdoor air to quantify and compare siloxane concentrations and compound ratios depending on location type. Indoor air samples had a median concentration of 2200 ng m(-3) for the sum of D4, D5, and D6. Outdoor sampling locations included downtown Chicago, Cedar Rapids, IA, and West Branch, IA, and had median sum siloxane levels of 280, 73, and 29 ng m(-3) respectively. A diurnal

SUBMITTER: Yucuis RA 

PROVIDER: S-EPMC3975597 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature