Technetium(IV) chloride is the inorganic compound with the formula TcCl4.

It is the highest oxidation binary chloride of technetium that has been isolated as a solid.

[2] Colloidal solutions of technetium(IV) chloride are oxidized to form Tc(VII) ions when exposed to gamma rays.

[3] Technetium tetrachloride can be synthesized from the reaction of Cl2 with technetium metal at elevated temperatures between 300 and 500 °C:[4] Technetium tetrachloride has also been prepared from the reaction of technetium(VII) oxide with carbon tetrachloride in a sealed vessel at elevated temperature:[5] At 450 °C under vacuum, TcCl4 decomposes to TcCl3 and TcCl2.

[6] As verified by X-ray crystallography, the compound is an inorganic polymer consisting of interconnected TcCl6 octahedra.