✨Bismuth basics Metal bismuth is silver-white (pink) to yellowish luster metal, melting point :271.3 ° C boiling point :1560±5 ° C Density: brittle and easy to crush, at room temperature, bismuth does not react with oxygen or water, stable in the air. When the metal bismuth is heated above the melting point, it can burn, emit a light blue flame, and form bismuth trioxide, and bismuth can also combine with sulfur and halogens at red heat. Bismuth is mainly used in the manufacture of fusing alloys, melting point range is 47~262 ° C, the most commonly used is bismuth with lead, tin, antimony, indium and other metals composed of alloys, used in fire protection devices, automatic water spray, boiler safety plug, once a fire, some water pipe piston will "automatically" melt, spray water.