... , ISO and CCIC 2,color: colorless clear 3,specification;90% Caustic potash 90%1,Potassium Hydroxide approved by SGS, ISO and CCIC 2 ... ,color: colorless clear 3,specification;90%Synonyms: Potassium hydroxide;Caustic potash ... such field , dye, drugs manufacture, galvanization, carving, lithography. Caustic potash 90%