An inventive granular, flowable composition containing sodium dithionite can be obtained by mixing a powdery sodium dithionite with a liquefiable, stabilizing suspension agent or with a highly concentrated solution of such a suspension agent. In order to produce such a composition, powdery sodium dithionite is mixed with a liquefied or dissolved stabilizing suspension agent and the obtained product is dried if necessary. An inventive reducing or decolorizing agent contains a granular, flowable composition as described above.
