It has found recent use in doping semiconductors and producing solid-state devices such as transistors. Biological Role Gallium has no known biological role. It is non-toxic. General Information Gallium is soluble in acids and alkalis. It has the longest liquid range of all elements, and can be liquid near room temperatures - it can melt in the hand.
Gallium wets glass or porcelain, and forms a brilliant mirror when painted on glass.