On June 11, 1999, Asiri, Abdullah Mohamed published an article.Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile The title of the article was Synthesis and characterization of dyes exemplified by 2-arylidene-1-dicyanomethyleneindane. And the article contained the following:
The synthesis of methine dyes formed by Knoevenagel condensation of aromatic aldehydes with 1-(dicyanomethylene)indan afforded a novel series of dyes absorbing in the region 490-593 nm. Substituents on the aromatic aldehyde moiety had a significant effect on the visible absorption maxima of the dyes; increasing the solvent polarity also had a pronounced effect on the absorption maxima. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile
The Article related to arylidenedicyanomethylindan cyanine dye preparation spectra, indan derivative methine dye preparation, Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers: Methines and Polymethines and other aspects.Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts