A process for preparing a tautomeric form of 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1'-oxy) -1,3,5-triazine

A process for the preparation of the tautomeric form I of 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1'-oxy) -1,3,5-triazine DOLLAR F1 of one or by crystallization from a tautomer mixture in the presence of more solvents selected from the group consisting of aliphatic alcohols having from 2 to 8 carbon atoms, aliphatic carboxylic alkyl esters having a total of 3 to 10 carbon atoms, aromatic carboxylic alkyl esters having a total of 8 to 12 carbon atoms, aliphatic Kohlensaureestern with a total of 3 to 9 C -atoms, carbonitriles having a total of 2 to 8 carbon atoms, dialkyl ketones having a total of 3 to 6 carbon atoms and aliphatic sulfones having a total of 3 to 6 carbon atoms, wherein the solvent or solvent mixture additionally contains up to 30 wt .-% of a may contain hydrocarbon. DOLLAR AI serves as light stabilizers in cosmetic preparations.