Antimony

**Definition:** A metallic element that has the atomic symbol Sb, atomic number 51, and atomic weight 121.75. It is used as a metal alloy and as medicinal and poisonous salts. It is toxic and an irritant to the skin and the mucous membranes.

**Tree numbers:** - D01.268.513.124 - D01.268.556.050 - D01.552.544.050