Galinstan is commercially used as a mercury replacement in thermometers due to its nontoxic properties, but the inner tube surface must be coated with gallium oxide to prevent the alloy from wetting the glass surface.
Galinstan has higher reflectivity and lower density than mercury; it was investigated for its use in the field of astronomy as a replacement for mercury in liquid mirror telescopes.
Galinstan may be used as a thermal interface for computer hardware cooling solutions, though major obstacles for widespread use are its cost and aggressive corrosive properties (it corrodes many other metals such as aluminum by dissolving them). It is also electrically conductive, and so needs to be applied more carefully than regular non-conductive compounds.
it is used for many commercial purposes mainly as a substitute for toxic Mercury and reactive Sodium -Potassium alloys. The non-toxicity and non-reactivity makes it a safer option than other metals like Lithium and Mercury for many applications.
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