Character is a white translucent sheet solid caustic soda, caustic soda is a basic chemical raw material, widely used in papermaking, synthetic detergent and soap, viscose, rayon and cotton and textile industry, pesticides, dyes, rubber and chemical industry, oil drilling, oil refining oil and tar refining oil industry and national defense industry, machinery industry, wood processing, metallurgical industry, medicine industry and city construction. Also used in the manufacture of chemicals, paper, soap and detergent, rayon and cellophane, processing bauxite alumina, is also used at the mercerized textiles, water treatment etc..