... microdot powder with luster, melting point at 622°c, easily soluble in water, with remarkable chelating ability to some metal ions such as ... Ca2+, Mg2+, can soften hard water, change suspension into solution, slightly alkaline, without causticity. Technical Specifications ... bag; Net weight 25kg, 50kg or 1000kg; keep away from water or moisture, do not pile up in the open air.