| abstract |
New 3-amino-5-hydroxypyridine derivatives are disclosed, of the formula I <IMAGE> (I) wherein R1 and R2 are independently CH3, C2H5 or C2H4OH, and its physiologically compatible salts, as well as oxidation hair coloring compositions based upon the compounds of general formula I as coupler substance. The oxidation hair coloring compositions based upon the new couplers, of which the 3-amino-5-hydroxy-2,6-dimethoxypyridine is preferred, are particularly suitable in combination with known developer substances to obtaining red, red-brown, bond and orange colored tones. The new coupler substances of formula I prove to have favorable toxicological and dermatological characteristics. |