My company sells sodium hydroxide contents are 99% and 96%. The physical property is the white opaque solid easy to wet. And it is widely used in papermaking, synthetic detergent and soap, viscose fiber, rayon and cotton textile and other light and textile industries, dyes, rubber and chemical industry, oil drilling, refining petroleum grease and tar oil refining industry, as well as the defense industry, machinery industry, wood processing, metallurgical industry, Pharmaceutical industry and urban construction and so on, it is also used in the manufacture of chemicals, paper, soap and detergents, rayon and cellophane, processing system of alumina bauxite, textiles, silk is also used at water treatment and so on