PREPARATION FOR OXIDIZING COLORATION OF HAIR Russian patent published in 1995 - IPC

FIELD: chemical-pharmaceutical industry. SUBSTANCE: this preparation for oxidizing coloration of hair is based on combination of developer and dye and includes derivative of diaminopyrazole of general formula (I): , wherein R₁, R₂ and R₄ are either similar or different radicals representing hydrogen, alkyl group including 1 - 4 carbon atoms, hydroxyalkyl group having 2 - 4 carbon atoms, benzyl and phenyl and R₃ denotes hydrogen, alkyl group including 1 - 4 carbon atoms or hydroxyalkyl group having 2 - 4 carbon atoms provided that aminogroups are in 3,4- or 4,5-position, or contains its physiologically compatible water-soluble salts and new diaminopyrazole derivatives. EFFECT: compounds of formula I are excellently physiologically compatible developing agents that produce excellent colors of deep shades in red-color range. 2 cl, 1 tbl