There is good function of changing color of preventing the light and heat from causing. Assay:98% ash:0.1%

Appearance:White powderAssay:98%minash:0.1%max

Light Transmittance:425nm 95min     500nm 97minvolatiles :0. 5%max

There is good function of changing color of preventing the light and heat from causing.

high assay and high quanlity antioxygen 1010