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The state of nano‐sized titanium dioxide (TiO 2 ) may affect sunscreen performance
Author(s) -
Tyner K. M.,
Wokovich A. M.,
Godar D. E.,
Doub W. H.,
Sadrieh N.
Publication year - 2011
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1468-2494.2010.00622.x
Subject(s) - titanium dioxide , nanoscopic scale , microscale chemistry , cosmetics , materials science , ultraviolet , nano , nanotechnology , coating , photocatalysis , chemical engineering , chemistry , composite material , optoelectronics , organic chemistry , mathematics , engineering , catalysis , mathematics education
Synopsis In the past several years, there has been a trend in the sunscreen/cosmetics industry to replace micron‐sized titanium dioxide (TiO 2 ) particles with nanoscale materials. The increased use of nanoscale TiO 2 has resulted in questions about these and other nanoproducts. This study examines the effects of using nanoscale TiO 2 on ultraviolet (UV) attenuation in simple to complex sunscreen formulations. UV light attenuation, product stability, and potential damage to the skin barrier were examined with both nanoscale and microscale TiO 2 particles. Results indicate that none of the formulations decreased the barrier function of the skin and the best UV attenuation occurs when the TiO 2 particles are stabilized with a coating and evenly distributed such as with non‐agglomerated coated nanoscale materials. This indicates that nanoscale TiO 2 may have better efficacy while lacking toxicity.