Methacrylonitrile

Methacrylonitrile
Names
	Preferred IUPAC name 2-Methylprop-2-enenitrile
	Other names Methylacrylonitrile; 2-Cyanopropene; 2-Cyano-1-propene; Isopropenecyanide; Isopropenylcyanid; Isopropene cyanide
Identifiers
CAS Number	126-98-7 ;
3D model (JSmol)	Interactive image;
Abbreviations	MeAN
ChEMBL	ChEMBL1529759;
ChemSpider	29101;
ECHA InfoCard	100.004.380
EC Number	204-817-5;
PubChem CID	31368;
RTECS number	UD1400000;
UNII	04S4K38612 ;
UN number	3079
CompTox Dashboard (EPA)	DTXSID1024176 ;
	InChI InChI=1S/C4H5N/c1-4(2)3-5/h1H2,2H3 Key: GYCMBHHDWRMZGG-UHFFFAOYSA-N;
	SMILES C=C(C)C#N;
Properties
Chemical formula	C4H5N
Molar mass	67.091 g·mol−1
Appearance	Clear colorless to very slightly yellow liquid
Odor	Bitter almonds
Density	0.8 g/mL
Melting point	−35.8 °C (−32.4 °F; 237.3 K)
Boiling point	90 to 92 °C (194 to 198 °F; 363 to 365 K)
Solubility in water	2.57 g/100 mL (20 °C)
Vapor pressure	71 mmHg (25 °C)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H301, H311, H317, H331
Precautionary statements	P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P272, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P311, P312, P321, P322, P330, P333+P313, P361, P363, P370+P378, P403+P233, P403+P235, P405, P501
Flash point	13 °C (55 °F; 286 K)
Explosive limits	2%-6.8%
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 1 ppm (3 mg/m3) [skin]
IDLH (Immediate danger)	N.D.
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Methacrylonitrile (or 2-Methylprop-2-enenitrile), MeAN in short, is a chemical compound that is an unsaturated aliphatic nitrile, widely used in the preparation of homopolymers, copolymers, elastomers, and plastics and as a chemical intermediate in the preparation of acids, amides, amines, esters, and other nitriles. MeAN is also used as a replacement for acrylonitrile in the manufacture of an acrylonitrile/butadiene/styrene-like polymer. It is a clear and colorless (to slightly yellow) liquid, that has a bitter almond smell.

It is toxic by ingestion, inhalation, and skin absorption.