密度：5.907 g/cm3 (20℃)
主要用于制备Ⅲ-Ⅴ族化合物半导体，为GaAs, GaP, GaAsP, GaAlAs, GaAlP高纯合金，晶体管合金，超低温合金，原子反应堆中之热载体以及锗，硅单晶的掺杂剂。
Gallium Metal, in the solid state, with light green metallic luster and good malleability, is quite steady in the air. Its density is 5.907g/cc, melting point is 29.75°C, so it has the widest temperature range in which the liquid state is maintained. It is nearly the same as silver in the liquid state. It is not resolved in water, and is apt to be dissolved in acids and alkalis. The gallium can form alloys with a lot of kinds of metals, and can form chemical compounds with some nonmetals.
High Purity Gallium:
Ga-04 Grade 99.99. The content of Gallium is above 99.99%. The total content of Ag, Al, Bi, Cd, Cu, Fe, Ga, In, Mg, Ni, Pb, Sb, Te & Tl is bellow 100 ppm;
Ga-05 Grade 99.999. The content of Gallium is above 99.999%. The total content of Ag, Al, Bi, Cd, Cu, Fe, Ga, In, Mg, Ni, Pb, Sb, Te & Tl is bellow 10 ppm;
Ga-06 Grade 99.9999. The content of Gallium is above 99.9999%. The total content of Ag, Al, Bi, Cd, Cu, Fe, Ga, In, Mg, Ni, Pb, Sb, Te & Tl is bellow 1 ppm;
It is mainly used in the preparation of the material of the selenium drum, photoelectric material, electrostatic photograph and other materials of optical instrument
Gallium metal must be stored in the capsules, rubber bottles and the containers made of polyethylene because there is violent expansion of about 3% when it is solidified.