Explanatory notes
… ) 2926.40 - alpha- Phenylacetoacetonitrile 2926.90 - Other The general formula of nitriles is RC º N in which R is … nitrogen. Mono-, di-, or tri-nitriles contain one, two or three cyanogen radicals (–CN) per molecule, respectively. … Acrylonitrile polymers and co-polymers are excluded ; they constitute plastics ( Chapter 39 ) or synthetic rubber …