acrylonitrile
/ˌækrəloʊˈnaɪtraɪl/
/ˌækrəloʊˈnaɪtrɪl/
noun
A pungent, toxic liquid, used in making artificial fibers and other polymers.
Further research led to the development of a fiber Vinyon N, which is a copolymer of vinyl chloride with acrylonitrile.