On November 22, 2001, Moeller, Hinrich; Oberkobusch, Doris; Hoeffkes, Horst published a patent.HPLC of Formula: 2510-01-2 The title of the patent was Hair dyes containing derivatives of nitrosopyridine or nitrosopyrimidine. And the patent contained the following:
The invention concerns hair dyes that contain nitrosopyridine or nitrosopyrimidine derivatives of the general formula (I), groups are defined, and a second dye that contains amino or hydroxy groups; the compositions color hair without the addition of oxidative agents. Thus violet red color was achieved by a composition that included 5 mmol 5-nitroso-2,4,6-triaminopyrimidine; 5 mmol 4-formyl-1-methylquinoline-p-toluene sulfate; 5 mmol piperidine, 1 drop of 20% fatty alkyl ether sulfate; 50 mL water; pH to 9 with sodium hydroxide and hydrochloric acid resp. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).HPLC of Formula: 2510-01-2
The Article related to hair dye nitrosopyridine nitrosopyrimidine, Essential Oils and Cosmetics: Hair Preparations and other aspects.HPLC of Formula: 2510-01-2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts