... (20 degree C),easily soluble in water,but not on organic solution,absorbent to dampness,and furn sticken when absorbed dampness in ... .5% maxIron (Fe)0.05% max0.05% maxPH value(1% solution)5.8-7.35.8-6.5solubilityQualifiedQualifiedHeavy metals (Pb)--------0 ... , it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; Diffusant in papermaking; slow corrodent ...