It is mainly used in the production of fertilizers, tanning, printing and dyeing, catalysts, papermaking, plastics, ceramics, pigments, matches, explosives and fire-retardant materials. It can be applied in the printing and dyeing of thin cotton fabrics and yarns, serving as a weighting agent for cotton yarns and a filler for kapok products. In the pharmaceutical field, it is used as a cathartic salt.

