Disazo dyes of the formula ##STR1## where n is 0, 1 or 2, D is a radical of a diazo component which is free of fiber-reactive groups, R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, Z is chlorine or unsubstituted or substituted amino and Q is hydroxysulfonylphenylene, are used for printing cellulose-containing materials.