Illustrated Glossary of Organic Chemistry

Tertiary ammonium salt (3o ammonium salt): An ammonium salt in which the nitrogen atom bearing the +1 formal charge has three carbon-nitrogen single bonds (i.e., it is bonded to three carbon groups).







Methylammonium chloride
A primary (1o) ammonium salt
  
Dimethylammonium chloride
A secondary (2o) ammonium salt
  
Trimethylammonium chloride
A tertiary (3o) ammonium salt
  
Tetramethylammonium chloride
A quaternary (4o) ammonium salt