... .78 ° C. Boiling point: 2403 ° C. Gallium is a silver-white metal. It can be dissolved ... . It is preferably stored in plastic containers. Specification 4N Gallium: 99.99% Testing impurities: Na, Al, Mg, ... Cu, Zn. Total impurity content: 100 ppm max. 5N Gallium: 99.999% Testing impurities: Na, Al, Mg, Si ... Cu, Zn. Total impurity content: 10 ppm max. 6N Gallium: 99.9999% Testing impurities: Na, Al, Mg, Si ...