Detailed Product Description Potassium Hydroxide FlakeTEST ITEMSPECIFICATIONAppearance White flakePotassium Hydroxide(KOH) ,weight %90%minCarbonates( ... ) ,pp,50 maxSilicate (SiO3) , ppm100 maxAluminum (Al) , ppm 20 maxCalcium (Ca), ppm50 maxNickel (Ni) , ppm5 maxHeavy metal (as Pb), ppm20 max