On April 10, 2003, Moeller, Hinrich; Oberkobusch, Doris; Hoeffkes, Horst published a patent.Application of 2510-01-2 The title of the patent was Hair dyes containing acetal derivatives of pyridine and quinoline. And the patent contained the following:
The invention concerns hair dyes that contain dimethoxy-, diethoxy Me and Et derivatives of pyridine and quinoline for use without or with oxidation agents. Further included are components from the group of primary and secondary amines, hydroxy compounds, aryl amines, N-containing heteroaryls, amino acids, 2-9 amino acid-composed oligopeptides, or CH-acids. Thus 4-diethoxymethyl-1-methylquinolinium-p-toluene sulfate was synthesized and used as a 5 mmol ingredient with 5 mmol 3-amino-2-methylamino-6-methoxypyridine dihydrochloride in a hair dyeing experiment; intense greenish brown color was obtained. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Application of 2510-01-2
The Article related to hair dye acetal pyridine quinoline oniumacetal, Essential Oils and Cosmetics: Packaging (Chemical Implication) and other aspects.Application of 2510-01-2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts