[Properties] colorless tran***rent tetragonal crystal, easy soluble in water, slight soluble in alcohol and insoluble in propanone; The aqueous solution is acidic.
[Uses] used to produce high-efficiency nitrogen-phosphorus compound fertilizer, as flame retardant in woods, paper and textile, as dispersant in fibre process and dye industry, as powder extinguishing agent. It is also used in prin***king and medicine production.