Caustic soda flakes NaOH Content% í¦------------------------99.00 Fe2O3 % í_----------------------------------0.003 Na2CO3 %í_------------------------------------0.9 NaCl %í_--------------------------------------0.2 Caustic soda beads/pearls/granules NaOH Content% í¦---------------------------99.00 Fe2O3 % í_----------------------------------0.002 Na2CO3 %í_------------------------------------0.4 NaCl %í_-------------------------------------0.02. Packing:25kg or 50kg in pp bags, 25mt in 20'FCL.