| abstract |
Disclosed are compounds of formula (1) or formula (2). The compounds are useful for the dyeing of organic materials, such as keratin fibers, wool, leather, silk, cellulose or polyamides, especially keratin-containing fibers, cotton or nylon, and preferably hair, more preferably human hair. (1) (2). n A-(X 1 ) p —(C sat ) r —S—S—(C sat ) q —(X 2 ) p -D (1) |