... product is the colourless transparent crystal, The purely solid caustic soda is white, there are bulk , bar-shaped , granular, the ... is fragile ; The purely liquid caustic soda is the colourless transparent liquid. The solid caustic soda has very strong hygroscopicity. Apt to ... bags(3 layers pp&pe).5. .Specification of Caustic soda Caustic soda flake 96% 98% 99%Caustic soda solid 96% 98% 99%Caustic ...