Physical and chemical properties: white or grayish brown non-qualitative powder, odorless, tasteless, hygroscopic. Soluble in water, insoluble in ethanol, ether, acetone, benzene and other organic solvents.

　　Usage: It is used to prevent prothrombin from transforming into thrombin, has anti-thrombotic effect, and is used to delay and prevent blood coagulation. It is the most effective anticoagulant drug with the largest clinical dosage in the world at present, mainly used in the treatment of cardiovascular and cerebrovascular diseases and hemodialysis.

　　Whether in vivo or in vitro, it has a rapid anticoagulant effect. It mainly acts on the formation of fibrin and can also reduce platelet aggregation. It can be used to prevent and treat thromboembolic diseases, such as myocardial infarction, pulmonary embolism, cerebrovascular embolism, peripheral venous thrombosis, etc., and can prevent thrombosis