Zinc, Zn—At. Wt. 65.39 [7440-66-6]—Use ACS reagent grade.
Zinc, Activated —Place zinc pellets in a conical flask, and add a sufficient quantity of a 50-ppm solution of chloroplatinic acid to cover all pellets. Allow the metal to remain in contact with the solution for 10 min, drain, wash, and dry immediately.
Assay— To 5 g of activated zinc add 15 mL of hydrochloric acid, 25 mL of water, 0.1 mL of stannous chloride solution (235 mg/mL in hydrochloric acid), and 5 mL of potassium iodide solution (166 mg/mL in water). No stain is produced when in contact with mercuric bromide paper. Repeat the test for arsenic, using the same reagents and adding a solution containing 1 µg of arsenic. An appreciable stain appears when in contact with mercuric bromide paper.
Zinc Acetate, Zn(CH3COO)2·2H2O—219.51 [557-34-6]—Use ACS reagent grade.
Zinc Amalgam —Add 54 g of mossy or granular zinc to 100 mL of mercury in a beaker. Heat, with stirring, on a hot plate under a hood [Caution—mercury vapor is extremely toxic] until solution of the zinc is complete or practically so. Allow to cool to room temperature, and if necessary add sufficient mercury to prevent solidification of the amalgam. Transfer the amalgam to a glass-stoppered bottle, and shake a few times with dilute hydrochloric acid (1 in 2), to remove any zinc oxide formed.
Zinc Chloride, Anhydrous, Powdered —Use Zinc Chloride (USP monograph) that has been dried and powdered.
Zinc Sulfate Heptahydrate, ZnSO4·7H2O—287.54 [7446-20-0]—Odorless crystals, granules, or powder.
Density: 1.97.
Zirconyl Chloride, Octahydrate, Basic —Use Zirconium Oxychloride.
Zirconyl Nitrate, ZrO(NO3)2—231.23 [13826-66-9]—Use a suitable grade.