Tetramethylammonium perchlorate is a perchlorate salt with a condensed formula [N(CH<sub>3</sub>)<sub>4</sub>]<sup>+</sup>ClO<sub>4</sub><sup>âÂÂ</sup>.
Tetramethylammonium perchlorate can be produced by mixing cold, dilute perchloric acid with cold tetramethylammonium hydroxide, the reaction will lead to a white precipitation.
The perchlorate is used as an intermediate in organic synthesis, in chromatography and as a supporting electrolyte in electrochemistry. Along with trimethylammonium perchlorate, it was investigated as a component in composite propellants during the Cold War, but without much success.