... to as 'chalk', is used as a drying agent for hands in rock climbing, gymnastics, and weight lifting. ... Magnesium carbonate is also used in taxidermy for whitening skulls. It can be mixed with hydrogen peroxide ... , pharmaceutiucals, intermediates. *** Strong in Optical Brightener /Fluorescent brightener (OBA) for polyester, cotton, paper, plastics, and detergent, pigments, ... View more >> ...