Apperance: Characters rose-colored triangular rhomboid crystals or amorphous bright white brown powder.

Nature: Stable in dry air, wet easy oxidation, the formation of manganese dioxide and gradually become brown black soluble in dilute inorganic acid, slightly soluble in common organic acid, insoluble in liquid ammonia. Practically insoluble in water, but slightly soluble in co2-containing water. Heating to 100 °C begins to decompose into carbon dioxide and manganese oxide (mr12 ). Hydrolysis occurs when azeotropic with water.

Use: Widely used as desulfurization catalyst, enamel pigment, manganese salt raw materials, also used in fertilizer, medicine, feed additives, electrode accessories.

Safety: Packed in polypropylene woven bags lined with three-layer polyethylene plastic bags, each with a net weight of 25kg or 50kg. Should be stored in a cool, ventilated, dry warehouse. Moisture, heat and deterioration should be prevented. Transport should be protected from rain and sun. When loading and unloading should be light to prevent packaging damage. When there is a fire, it can be suppressed by water, sand, and fire. Toxicity and protection: See manganese metal.