Tetramethylammonium perchlorate

Tetramethylammonium perchlorate is a perchlorate salt with a condensed formula [N(CH3)4]+ClO4−.

Preparation
Tetramethylammonium perchlorate can be produced by mixing cold, dilute perchloric acid with cold tetramethylammonium hydroxide, the reaction will lead to a white precipitation.

Uses
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.