Tetra Butyl Ammonium Chloride with chemical formula of C16H36ClN is an organic chloride salt that comprises a tetrabutylammonium cation and chloride anion. It is a white crystalline powder that is soluble in water and polar organic solvents. It finds use in organic reactions that includes transferring anions from an aqueous phase to an organic phase, such as polymerization reactions. The other applications include its use as a corrosion inhibitor and as a biocide. It is a toxic compound and should be handled with care.