Tungsten Trioxide Nanopowder
http://www.cosmoscience.org/shop/fm-sr-23851-tungsten-trioxide-nanopowder-24141
http://www.cosmoscience.org/web/image/product.template/24141/image_1920?unique=2daf0d8
Tungsten trioxide nanoparticles, 60-90nm size with 99.5% purity, used in gas sensors, photocatalysis, and electrochromic devices. 5g
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