Hydrazine: nitrogen content in the crust rarely in nature most of the nitrogen in the form of elemental nitrogen molecules in the atmosphere, nitrogen accounted for the volume of air seventy-eight%. The most important mineral nitrogen is nitrate. [1] The percentage by weight of nitrogen in the earth's crust is 0.0046% oxygen linking pesticide, the total reached about 4 × 1012 tons. Animals and plants, the protein contains nitrogen. There nitrate in soil, such as KNO ?. In South America, Chile saltpeter mine (NaNO?), Which is the world's only such mineral, is a rare mineral nitrogen. [2] universe of interstellar molecular nitrogen has been found linking oxygen preservatives, such as NH?, HCN and the like. The abundance of nitrogen accounting for 1.8 × 10 16. There are two natural isotopes of nitrogen were 99.63%, 0.365%. Hydrazine is a widely used industrial chemicals linked oxygen, has a high heat of combustion and fuel cells can be used as rocket fuel. Hydrazine is a strong reducing agent, used to remove water and hot water boiler heating system of oxygen, to reduce corrosion. This product is highly toxic! Mouse oral LD50 was 59mg / kg, intravenous LD50 was 57mg / kg. Erosion glass, rubber, leather, cork and the like. There are basic, inorganic salt acid synthesis associated with the oxygen reducing agent, Connaught Chemical (certified), United oxygen provided by the Qingdao-Connaught Chemical Co. Qingdao-Connaught Chemical Co., Ltd. (www.qdweinuo.com) is in Qingdao, Shandong, chemical products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Connaught Chemical leadership with the staff warmly welcome all inquiries negotiations to create Connaught chemical better future.