99% Caustic Soda NaOH Purity 96%/98%/99% min Used in petroleum,textile,detergent,soap Export Middle East of Asia/ ... : Sodium hydroxide is the principal strong used in the chemical industry.Generally it is used in chemical analysis, Soap production, Paper ... making, Alumina production, Biodiesel, Aluminium etching, Food preparation and used as Paint stripper, Gold pennies, etc. 99% Caustic Soda