... .8-6.5solubilityQualifiedQualifiedHeavy metals (Pb)--------0.001% maxArsenic (As)--------0.0003% maxFluoride (F)--------0.003% maxWater insoluble0. ... 05%max0.06% max Application:For industrial use, such as oil field, paper-making, textile, dyeing, petrochemical industry ... industry and building material industry, it is mainly used as a water softening agent in solution for printing, ...