Copper

CAS Number: 7440-50-8. Copper is a reddish metal that occurs
naturally in rocks, soil, water, and air. It also occurs
naturally in plants and animals. Metallic copper is easily molded
or shaped, and can be found in the U.S. penny, electrical wiring,
and some water pipes. It can also be found in mixtures (called
alloys) with other metals such as brass and bronze. Copper is
also found as part of other compounds forming salts. Copper salts
occur naturally, but are also manufactured. The most common
copper salt is copper sulfate. Most copper compounds are
blue-green in color. Copper compounds are commonly used in
agriculture to treat plant diseases like mildew, for water
treatment and, as preservatives for wood, leather, and fabrics.
Chemical formula = Cu. Molecular weight = 63.55 g/mol.