Sodium Hydrosulfite
Net: 50KGS
Formula: Na 2S 2O 4
Molar mass: 174.107 g/mol
Density: 2.38 g/cm³
Sodium Hydrosulfite (or "Hydro") is a universal reducing agent that is used for indigo dyeing. It is also used as a non-aggressive alternative to bleach for removing color from dyed fabrics and for whitening antique textiles.
Major Uses
Reducing agent to strip certain dyes from fabrics and in vat dyeing; bleaching agent for ground wood pulp, soap, straws, sugar reducing agent to strip certain dyes from fabrics and in vat dyeing; bleaching agent for ground wood pulp, soap, straws, sugar Oxygen scavenger for synthetic rubbers; vat dyeing of fibers and textiles; stripping agent for dyes; reagent; bleaching of sugar, soap, oils, and groundwood. As reducing agent, particularly in dyeing with indigo and vat dyes; bleaching soaps, straw; removing dyes from dyed fabrics. All uses of sodium dithionite are based on its reducing properties. In the textile industry, sodium dithionite is primarily used as reducing agent for vat dyes and sulfur containing dyes, and for the removal of pigments on textiles. It is also used as a bleaching agent in reductive bleaching processes, for instance, in the bleaching of mechanical paper pulp, and the bleaching of cotton and wool, as well as sugar. The use pattern is 50% textile bleaching, 35% pulp and paper bleaching, 5% kaolin bleaching, 10% other applications (e.g. household stain remover).
