Manganese Sulfate MnSO4. H2O Mn 31. 8%min Pass 250um Sieve>95% usage 1.as a porcelain glaze, as a fertilizer additive 2.as a catalyst. It is added to soils to promote plant growth, especially of citrus crops. It is a good reducing agent for manufacturing paints, varnish driers. 3.used in textile dyes, fungicides, medicines and ceramics. In foods, it is used as a nutrient and dietary supplement. 4 ...