bismuth ingot chunk 99.99% pure by rotometals about 1 pound rotometals dot com sold by the bag. this is a chunk of rotometals 99.99% bismuth that is broken off of a larger ingot. physical information atomic number - 83 relative atomic mass (12c=12.000) - 208.98 melting point - 520f boiling point - 2642f density - 9.80 weight lb/in3 - 0.3541 bi 99.99% by rotometals a online company