... will be refund after comfirm order5 .Application: The use of caustic soda/sodium hydroxide and alkaline desiccant, paper, aluminum smelting, refining tungsten ... permanganate, phosphate, etc., but also the use of many of caustic soda.6.Packing It is packed with polyethylene bag as liner ... ,best price.4,Small quantity is welcomed Sodium Hydroxide tech grade (caustic soda)