Heparin,a natural anticoagulant,is a kind of sulphated glycosaminoglycans.The moldcule is a chain structure consisting orepeated hexose or octose units,its main disaccharide units is trithionicacid disaccharide.Heparin persents in warious mammalian tissues including liver,lung,heart,spleen,kidney,thymus,intestinal mucosa,muscle and blood.Thus heparin can be extracted from healthy porcine intestinal mucosa and lung or healthy bovine lung,all stages of production and procurement must be conducted under the supervision of Quality Management System.The production technology is validated by the virus inactivated production process,so the harmful contaminants can be removed.