Magnesium nitrate hexahydrate, for analysis, 99.0-101.0% , Producator Fisher Chemical, Ammonium (NH4) <= 0.002 % Assay >= 99 and <= 101 % Calcium (Ca) <= 20 ppm Copper (Cu) <= 2 ppm Iron (Fe) <= 2 ppm Lead (Pb) <= 2 ppm Potassium (K) <= 10 ppm Sodium (Na) <= 10 ppm Total chloride (Cl) <= 0.001 % Total phosphorus (P) <= 5 ppm Total silicon (Si) <= 5 ppm Total sulfur (S) <= 20 ppm Zinc (Zn) <= 5 ppm pH (5% aq. solution) >= 5 and <= 7 " KG 1 384.64 "Chromium(III) nitrate nonahydrate, 99%, Producator Acros Organics Appearance (Color) Dark purple to black Appearance (Form) Crystalline chunks Titration Iodometric >=98.5 % pH 2 to 3 (5 % in water) Calcium (Ca) =<50 ppm Cadmium (Cd) =<10 ppm Cobalt (Co) =<10 ppm Copper (Cu) =<10 ppm Iron (Fe) =<200 ppm Magnesium (Mg) =<50 ppm Manganese (Mn) =<10 ppm Sodium (Na) =<50 ppm Nickel (Ni) =<50 ppm Lead (Pb) =<20 ppm Strontium (Sr) =<50 ppm Zinc (Zn) =<10 ppm Chloride (Cl) =<20 ppm Sulfate (SO4) =<50 ppm Ammonium (NH4) =<10 ppm Subst not pptd by NH4OH =<0.2 % (as SO4)" KG 2 470.54 "Azotat de nichel(II) hexahidrat pentru analiza EMSURE® ACS, Producator Merck, Assay (complexometric) 99.0 - 102.0 % Insoluble matter ≤ 0.005 % Chloride (Cl) ≤ 0.001 % Sulfate (SO₄) ≤ 0.002 % Ca (Calcium) ≤ 0.005 % Co (Cobalt) ≤ 0.005 % Cu (Copper) ≤ 0.0005 % Fe (Iron) ≤ 0.001 % K (Potassium) ≤ 0.01 % Mg (Magnesium) ≤ 0.01 % Mn (Manganese) ≤ 0.002 % Na (Sodium) ≤ 0.005 % NH₄ (Ammonium) ≤ 0.05 % Pb (Lead) ≤ 0.001 % Zn (Zinc) ≤ 0.001 %" 1 KG 1 723.84 "Cobalt(II) nit