Male and female rats and mice were gien four different doses of sodium dichromate dihydrate in their drinking water ranging from 14.3 mg/l to 516 mg/l for two years.

• 研究人员在雌雄大鼠和小鼠的饮用水中加入4种不同剂量（14.；3毫克/升至516毫克/升）的重铬酸钠，为期两年。