Trimethylarsine

Trimethylarsine
Names
	Preferred IUPAC name Trimethylarsane
	Other names Gosio gas; Trimethanidoarsenic;
Identifiers
CAS Number	593-88-4 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	1730780
ChEBI	CHEBI:27130 ;
ChemSpider	62200 ;
ECHA InfoCard	100.008.925
EC Number	209-815-8;
Gmelin Reference	141657
MeSH	Trimethylarsine
PubChem CID	68978;
RTECS number	CH8800000;
UNII	MQ83UQ8A1Q ;
CompTox Dashboard (EPA)	DTXSID4073203 ;
	InChI InChI=1S/C3H9As/c1-4(2)3/h1-3H3 Key: HTDIUWINAKAPER-UHFFFAOYSA-N ; InChI=1/C3H9As/c1-4(2)3/h1-3H3 Key: HTDIUWINAKAPER-UHFFFAOYAT;
	SMILES [As](C)(C)C; C[As](C)C;
Properties
Chemical formula	C3H9As
Molar mass	120.027 g·mol−1
Appearance	Colourless liquid
Density	1.124 g cm−3
Melting point	−87.3 °C (−125.1 °F; 185.8 K)
Boiling point	56 °C (133 °F; 329 K)
Solubility in water	Slightly soluble
Solubility in other solvents	organic solvents
Structure
Coordination geometry	Trigonal pyramidal
Dipole moment	0.86 D
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Flammable
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H410
Flash point	−25 °C (−13 °F; 248 K)
Safety data sheet (SDS)	External MSDS
Related compounds
Related compounds	Cacodylic acid; Triphenylarsine; Pentamethylarsenic; Trimethylphosphine; Trimethylamine
Supplementary data page
	Trimethylarsine (data page)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Trimethylarsine (abbreviated TMA or TMAs) is the chemical compound with the formula (CH₃)₃As, commonly abbreviated AsMe₃ or TMAs. This organic derivative of arsine has been used as a source of arsenic in microelectronics industry, a building block to other organoarsenic compounds, and serves as a ligand in coordination chemistry. It has distinct "garlic"-like smell. Trimethylarsine had been discovered as early as 1854.