Tetraethylammonium (TEA) or (Et4N+) is a quaternary ammonium cation consisting of four ethyl groups attached to a central nitrogen atom, and is positively charged. It is a counterion used in the research laboratory to prepare lipophilic salts of inorganic anions. It is used similarly to tetrabutylammonium, the difference being that its salts less lipophilic and more easily crystallized.

CAS：66-40-0
中文别名：
英文别名：AMMONIUM,TETRAETHYL;Tetrylammonium;Tetramon;TETRAETHYLAMMONIUM ION;[14C]-Tetraethylammonium cation;tetraethylazanium;Tetraethylammonium;N,N,N-Triethylethanaminium;Tetraetilammonio [Italian];teteraethylammonium;[3H]-Tetraethylammonium cation;
分子式：C8H20N+
分子量：130.251
精确质量：130.16
Psa：0.0
Logp：1.8828

UNII：5AV7G7EIEE