title: High-throughput exposure modeling to support prioritization of chemicals in personal care products.
abstract: We demonstrate the application of a high-throughput modeling framework to estimate exposure to chemicals used in personal care products (PCPs). As a basis for estimating exposure, we use the product intake fraction (PiF), defined as the mass of chemical taken by an individual or population per mass of a given chemical used in a product. We calculated use- and disposal- stage PiFs for 518 chemicals for five PCP archetypes. Across all product archetypes the use- and disposal- stage PiFs ranged from 10(-5) to 1 and 0 to 10(-3), respectively. There is a distinction between the use-stage PiF for leave-on and wash-off products which had median PiFs of 0.5 and 0.02 across the 518 chemicals, respectively. The PiF is a function of product characteristics and physico-chemical properties and is maximized when skin permeability is high and volatility is low such that there is no competition between skin and air losses from the applied product. PCP chemical contents (i.e. concentrations) were available for 325 chemicals and were combined with PCP usage characteristics and PiF yielding intakes summed across a demonstrative set of products ranging from 10(-8)-30 mg/kg/d, with a median of 0.1 mg/kg/d. The highest intakes were associated with body lotion. Bioactive doses derived from high-throughput in vitro toxicity data were combined with the estimated PiFs to demonstrate an approach to estimate bioactive equivalent chemical content and to screen chemicals for risk.
authors: Oak Ridge Institute for Science and Education (ORISE) Research Participation Program, hosted at U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA. Electronic address: susan.csiszar@gmail.com.
authors: Susan A
authors: SA
authors: Csiszar
authors: Quantitative Sustainability Assessment Division, Department of Management Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors: Alexi S
authors: AS
authors: Ernstoff
authors: Quantitative Sustainability Assessment Division, Department of Management Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors: Peter
authors: P
authors: Fantke
authors: Office of Research and Development, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH 45268, USA.
authors: David E
authors: DE
authors: Meyer
authors: Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA. Electronic address: ojolliet@umich.edu.
authors: Olivier
authors: O
authors: Jolliet
mesh_terms: D003358:Cosmetics / Q000737:chemistry*; D004463:Ecology; D004781:Environmental Exposure; D004784:Environmental Monitoring / Q000379:methods; D006801:Humans; D015233:Models, Statistical; D010226:Parabens / Q000737:chemistry; D010539:Permeability; D010795:Phthalic Acids / Q000737:chemistry; D018570:Risk Assessment / Q000379:methods; D012867:Skin / Q000187:drug effects; D018675:Toxicity Tests
chemical_list: D003358:Cosmetics; D010226:Parabens; D010795:Phthalic Acids; C032279:phthalic acid
keywords: Exposure modeling; High-throughput; Mass balance modeling; Personal care products; Product intake fraction; Risk screening