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CAS#: 7758-11-4 | Formula: K2HPO4 | Specifications: Absorbance (1M in H2O) @ 260 nm 0.08, Absorbance (1M in H2O) @ 280 nm 0.06, Al 5 ppm Max, As 0.1 ppm Max, Assay 99 % - Min, Ba 500 ppm Max, Bi 5 ppm Max, Ca 10 ppm Max, Cd 5 ppm Max, Chloride (Cl) 0.005 % Max, Co 5 ppm Max, Cr 5 ppm Max, Cu 5 ppm Max, Fe 5 ppm Max, Insoluble matter 0.01 % Max, Li 5 ppm Max, Mg 5 ppm Max, Mn 5 ppm Max, Mo 5 ppm Max, Na 500 ppm Max, Ni 5 ppm Max, Pb 5 ppm Max, pH(1M in water at 20 C) (pH) 8.5 - 10.0 pH, Sr 5 ppm Max, Sulfate (SO4) 0.005 % Max, Zn 5 ppm Max