1. Used as a reducing agent to reduce titanium, zirconium, niobium, tantalum and other metals that have important uses in the defense industry from their molten halides.

　　2. Used as chemical raw material to produce sodium butadiene rubber, sodium hydride, sodium peroxide, sodium cyanide and other sodium-containing compounds.

　　3. Manufacturing alloy. Sodium and mercury alloy sodium amalgam, used as a reducing agent for organic synthesis. Sodium-lead alloy Na4Pb, used in the production of gasoline antiknock agent tetraethyl lead: Na4Pb+4C2H5Cl=(C2H5)4Pb+4NaCl .Sodium-potassium alloy is liquid at room temperature. It has a low density, low viscosity, high specific heat, and high thermal conductivity. It is used as a coolant and heat exchanger for nuclear reactors.

　　4. Used as an electric light source. The yellow light of sodium vapor has strong fog penetration. High pressure sodium lamps made of sodium are widely used in highway lighting.

　　5. It is used to make an antiknock agent-tetraethyl lead, which can reduce the knock of gasoline and reduce the noise that occurs when gasoline is used in gasoline engines. Tetraethyl lead is usually used to make chloroethane and metal It is made by reacting an alloy of sodium and lead (sodium-lead).