... metal ions such as Ca 2+, Mg 2+, can soften hard water, change suspension into solution, slightly alkaline, without causticity. 2, Usage ... : Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant ... bag; Net weight 25kg, 50kg or 1000kg; Keep away from water or moisture, do not pile up in the open air ...