... with luster, melting point at 622°C, easily soluble in water, with remarkable chelating ability to some metal ions such as ... insoluble ≤%0.05Application: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary ... It should be stored in a ventilative and dry warehouse instead of in the open air, kept away from water, moisture and sunlight ...