... granular crystals,soluble in water, but non-soluble in organic solution; relative density at 2.484g/cm3(20),and melting point ... at 616.Application Used as additive agent,PH adjustable agent,water agent in the solution for printing and dyting and boiler,Diffusion ... pb %≤0.0016Arsenic,as As %≤0.00037Frioride %≤0.003 shmp PH adjustable agent