Mercury is a silver liquid used in many consumer products. It is ILLEGAL to dispose of mercury or mercury-containing products in the trash or recycling. While useful when contained in the products, if released into the environment and ingested, it is TOXIC to the nervous system, liver and kidneys. Pregnant women and young children are most vulnerable. One liquid ounce (2 tablespoons) of mercury weighs nearly a pound! (specific gravity = 13.56 g/ml)