Methacrylonitrile

Structural formula
General
Surname	Methacrylonitrile
other names	2-methyl-2-propenenitrile 2-cyanopropene 2-cyano-1-propene
Molecular formula	C 4 H 5 N
Brief description	light-sensitive, volatile, colorless liquid with a pungent odor
External identifiers / databases
CAS number 126-98-7 EC number 204-817-5 ECHA InfoCard 100.004.380 PubChem 31368 Wikidata Q2088171
properties
Molar mass	67.09 g · mol -1
Physical state	liquid
density	0.80 g cm −3
Melting point	−36 ° C
boiling point	90 ° C
Vapor pressure	104 m bar (30 ° C)
solubility	little in water (25.7 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 225-301 + 311-330-317 P: 210-260-280-284-301 + 310-310
MAK	Switzerland: 1 ml m −3 or 3 mg m −3
Toxicological data	120 mg kg -1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Methacrylonitrile is a chemical compound from the nitrile group . It is the nitrile of methacrylic acid , which is a colorless, highly flammable, poisonous and pungent-smelling liquid at room temperature.

Extraction and presentation

Methacrylonitrile can be obtained by reacting methacrylic acid or methacrylic acid methyl ester with ammonia under a catalytic gas phase reaction at temperatures of 250 ° C to 500 ° C. Alumina can be used as a catalyst .

properties

Methacrylonitrile is light-sensitive and at room temperature it is a colorless, volatile liquid with a pungent odor. This solidifies at −36 ° C and boils at 90 ° C. Methacrylonitrile has a flash point of −1 ° C and an ignition temperature of 465 ° C. The lower explosion limit of methacrylonitrile is 1.7% by volume and the upper explosion limit is 13.2% by volume. Methacrylonitrile falls into temperature class T1 due to its ignition temperature .

use

Methacrylonitrile is used in group transfer polymerization .

safety instructions

Methacrylonitrile is toxic and is mainly absorbed via the respiratory tract and the skin. After absorption, the substance has a toxic effect on the central and peripheral nervous system . Methacrylonitrile vapors can form explosive mixtures with air.

See also

• Methacrylamide

Individual evidence

1. ↑ ^{a b c d e f g h i j k l m n} Entry on methacrylonitrile in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
2. ↑ Entry on methacrylonitrile in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
3. ↑ Schweizerische Unfallversicherungsanstalt (Suva): Limits - Current MAK and BAT values (search for 126-98-7 or methacrylonitrile ), accessed on November 2, 2015.