Authors: M.L. Kreider, K.M. Unice, A.K. Madl
Affilation: Cardno ChemRisk, United States
Pages: 91 - 93
Keywords: titanium dioxide, sunscreen, consumer exposure
In this study, we simulated consumer application of a spray sunscreen containing nanoscale TiO2 to determine the nature of consumer TiO2 exposure from the product’s use (e.g. form of TiO2 [primary particle, aggregate/agglomerate], size of TiO2 and air concentration). Air samples were collected within the breathing zone of a mannequin using a Dekati Low Pressure Impactor (DLPI), which allows for size fractionation of the particles across 13 stages to facilitate size-specific exposure assessment. Samples from all stages were analyzed for the presence of titanium (as a marker for TiO2) and resulting air concentrations were calculated by size fraction. Upon determination of stages where TiO2 was detected, subsequent analysis by field emission scanning electron microscopy was used to determine the form and morphology of the TiO2 particles. We will present the results of this study along with interpretation with respect to the potential for health risk from this consumer application.