1)Caustic Soda (Sodium Hydroxide) 2)Purity:96%,98%,99%. 3)Form:Flakes,Pearls and Solid. 4)Package:N.W25kgs/bag Caustic Soda 96%,98%,99%Supplier1. ... Chemical and Physical Properties:Product Name: Sodium Hydroxide (Caustic Soda ... as aluminium, tin, zinc, lead etc. and their alloys. Caustic Soda Flakes 99