White crystals (dodecahydrate) or white powder (anhydrous), industrial grade. The dodecahydrate is used as a boiler water softener, flame retardant for textiles, wood and paper, in detergent production, as a glaze and soldering flux, as a stabiliser for hydrogen-peroxide bleaching in dyeing, as a culture medium component for MSG, erythromycin, penicillin, streptomycin and biochemical wastewater treatment, and in electroplating; in food industry for baking powder as quality improver, emulsifier, nutritional fortifier, fermentation aid and binder; the anhydrous form serves as flame retardant, silk weighting agent and reactive dye auxiliary, replacing borax in welding and brazing. Packed in 25 kg / 50 kg bags, stored in a ventilated dry place.