On April 10, 2003, Moeller, Hinrich; Oberkobusch, Doris published a patent.HPLC of Formula: 2510-01-2 The title of the patent was Hair dyes containing aromatic or heteroaromatic aldehydes and ketones in combination with other dyes and color intensifiers. And the patent contained the following:
The invention concerns hair dyes that contain aromatic or heteroaromatic aldehydes and ketones and 4-aminopyrazoline-5-one derivatives Further components are selected from the group of primary and secondary aromatic amines, hydroxydes, nitrogen-containing heterocycles, amino acids etc. Thus in a dyeing experiment 5 mmol 4-formyl-1-methylpyridinium benzene sulfonate and 5 mmol 4-aminoantipyrine were mixed and pH 6 was set with sodium hydroxide; an intensive gold-yellow color was obtained. 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 aromatic heteroaromatic aldehyde ketone aminoantipyrine, Essential Oils and Cosmetics: Hair Preparations and other aspects.HPLC of Formula: 2510-01-2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts