M 1810 (OTTO) Methacrylonitrile, 99% Cas 126-98-7 - used as a replacement for acrylonitrile in the manufacture of an acrylonitrile / butadiene / styrene-like polymer. M 1810 (OTTO) Methacrylonitrile, 99% Cas 126-98-7 - 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.