... melting point at 622 o C, easily soluble in water, with remarkable chelating ability to some metal ions such ... 2+, Mg 2+, can soften hard water, change suspension into solution, slightly alkaline, without causticity. Specifications IndexesIndustrial GradeFood GradeAssay ... main auxiliaries for synthetic detergent, synergist for soap;2) Water softener, tanning agent for leather making, auxiliary for ...