Tetramethylammonium

Tetramethylammonium
Names
	Preferred IUPAC name N,N,N-Trimethylmethanaminium
	Other names Tetramethylammonium; Tetramethylazanium; Tetramine
Identifiers
CAS Number	51-92-3 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:46020 ;
ChemSpider	6140 ;
PubChem CID	6380;
UNII	H0W55235FC ;
CompTox Dashboard (EPA)	DTXSID3048071 ;
	InChI InChI=1S/C4H12N/c1-5(2,3)4/h1-4H3/q+1 Key: QEMXHQIAXOOASZ-UHFFFAOYSA-N;
	SMILES C[N+](C)(C)C;
Properties
Chemical formula	C4H12N+
Molar mass	74.14 g/mol
Related compounds
Related isoelectronic	neo-pentane
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetramethylammonium (TMA) is the simplest quaternary ammonium cation. It has the chemical formula [Me₄N]⁺ and consists of four methyl groups (−CH₃, denoted Me) attached to a central nitrogen atom. The cation is isoelectronic with neopentane (Me₄C). It is positively-charged and can only be isolated in association with a counter-ion. Common salts include tetramethylammonium chloride and tetramethylammonium hydroxide. Tetramethylammonium salts are used in chemical synthesis and in pharmacological research. It confers no color to its salts.

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