On May 14, 1991, Yamaji, Mitsuharu published a patent.Safety of 3-Methylpyridine-2,6-diamine The title of the patent was Preparation of 3-alkyl-2,6-diaminopyridines as developers for hair dyes. And the patent contained the following:
The diaminopyridines are prepared by treating 3-alkyl-2-aminopyridines with alkali metal amides in inert solvents and quenching the reaction mixtures with OH-containing compounds Thus, a solution of NaNH2 in Tetralin was treated dropwise with 2-amino-3-methylpyridine, then the mixture was quenched with H2O to give 62% 3-methyl-2,6-diaminopyridine. The experimental process involved the reaction of 3-Methylpyridine-2,6-diamine(cas: 51566-22-4).Safety of 3-Methylpyridine-2,6-diamine
The Article related to hair dye developer alkyldiaminopyridine, aminopyridine amination alkali amide, Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers: Other Dyes and Pigments and other aspects.Safety of 3-Methylpyridine-2,6-diamine