Methods of forming dry-to-the-touch peroxide compositions

A method of preparing a combination of liquid peroxide and dry solid support comprising spraying a liquid peroxide solution onto a dry silica solid support comprising mixing a hydrophobic or hydrophilic silica powder in a blending unit comprising mixing apparatus and one or more spray nozzles to form a powder wherein the spray nozzles are oriented to minimize impact of the spray on the surfaces of the blending unit or mixing apparatus and the ratio of the liquid peroxide spray droplet size to the silica solid support particle size is between about 0.5 and 10,000 and the blending unit is operated at a Froude number of 1 or less.