Description: USP grade zinc oxide, from natural zinc ore, super-finely micronized. Particle size: <100 nanometer (0.1 micrometer), mean particle size is around 85 nm (depending on the method of measurement the mean particle size has also been found to be in the range of 30-55nm). Able to reflect & absorb UVA & UVB light. Fine white transparent powder with minimal whitening, faint odor. Dispersible in water & oils. CAS: 1314-13-2 INCI Name: Zinc oxide Properties: Shown to reflect sunlight (UVB rays). Soothing effects for skin irritations, antimicrobial properties. Transparent with minimal whitening effect. Use: Add preferentially to water phase, usually combined with organic sunscreens, typical use level 3-6% when combined with organic sunscreens, use level when used alone 3-20%. For external use only.