composing         Flack/Pearl 96%          Flack/Pearl 98%          Flack/Pearl  99%

NaOH                      96%min                              98%                             99%min

NaCO3                      1%max                           0.5%max                       0.4%max

NaCl                           2%max                           0.03%max                    0.015%max

Fe2O3                        0.01%max                      0.005max                     0.001%max

usage :used as soap-making ,paper printing,texile ,glass ,enamal ,pharmacy ,dyestuff ,metallic wares ,pesticides ,leather-making and fat-refining ,etc