... C), easily soluble in water, but not in organic solution, absorbent to dampness, and turn sticky when absorbed dampness ... .53Iron, as Fe %≤0.050.054Ph value (1% solution) %≤5.8-7.35.8-6.55SolubilityQualifiedQualified6Heavy metals, as ... it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; Diffusant in papermaking; ... (SHMP) 68% as water softening agent in solution