Galinstan

Galinstan is a family of eutectic alloys mainly consisting of gallium, indium, and tin. These alloys are liquids at room temperature, typically melting at −19 °C (−2 °F). Due to the low toxicity and low reactivity of its component metals, it finds use as a replacement for many applications that previously employed toxic liquid mercury or reactive NaK (sodium-potassium alloy). A typical composition is 68% Ga, 22% In and 10% Sn, though it varies between 62% to 95% Ga, 5% to 22% In, 0% to 16% Sn while keeping eutectic ability. The marketing name is a portmanteau of gallium, indium, and stannum (Latin for "tin"). Galinstan is a registered trademark of the German company Geratherm Medical AG. The exact composition of Galinstan is unknown.