Gallium, light blue metal, becoming a silvery-white liquid at 29.76℃. Liquid gallium is easily overcooled or is cooled to 0℃ without curing. Microsoluble in mercury, forming a gallium amalgam. Gallium can infiltrate the glass, so it should not be stored in a glass container.

It becomes liquid when heated to the melting point, then cooled to 0℃ without curing, and when converted from liquid to solid, its volume increases by about 3.2%. The hardness of 1.5~2.5. Gallium is stable in dry air at room temperature.
It is easily hydrolysis, especially at physiological pH. Pure gallium is silver white and can infiltrate the glass, with a high boiling point and a low steam pressure at about 1500℃.

Application

Manufacturing semiconductor gallium nitride, GaAs, Gaum phosphate, germanium semiconductor dopants; pure gallium and low melting alloys can be heat exchange medium for nuclear reaction; a filler of high-temperature thermometer; and catalyst for diesterification in an organic reaction.
The industrial application of gallium is still primitive, although its unique performance may be applied in many aspects. The wide temperature range of liquid gallium and its low steam pressure allows it to be used for high-temperature thermometers and temperature presses.

Packing:

Because the density of liquid gallium is higher than the solid density, the volume expands at solidification, and the melting point is very low, constantly melting and solidification during storage. So the use of glass storage will break the bottle and infiltration glass causes waste, gallium is suitable for plastic bottles (not filled) storage.