This product is an alkaline protein sulfate extracted from fresh mature sperm suitable for fish. According to the dry product, it is white or white-like powder, odorless, hygroscopic, soluble in water, insoluble in ethanol, chloroform or ether. This product has strong basic groups, which can combine with strong acidic heparin in vivo to form a stable complex, thus making heparin lose its anticoagulant ability. It also has a mild antithrombin kinase effect, and is generally not used for anticoagulation caused by non-heparin. Because this product can be combined with some protein and peptides, it can be used to form a complex with insulin and adrenocorticotropic hormone to prepare a long-acting injection. Mainly used for bleeding and spontaneous bleeding caused by severe overdose of heparin sodium or heparin calcium, such as hemoptysis.