Hydrazine hydrate ferrous sulfate or blue-green monoclinic crystalline particles. Odorless. Weathering in dry air. Surface oxidation in moist air into the basic ferric brown. At 56.6 ℃ become tetrahydrate at 65 ℃ when becoming monohydrate. Hydrazine hydrate dissolved in water, practically insoluble in ethanol. Cold aqueous solution was slowly oxidized in air, rapid oxidation when hot. Adding alkali or exposed light accelerated oxidation. Relative density (d15) 1.897. The median lethal dose (mouse, oral) 1520mG / kG. Irritation. Ferrous sulfate is a white powder of anhydrous hydrazine hydrate reducing agent, containing water of crystallization is light green crystals, crystal commonly known as "copperas", dissolved in water solution as a light green. For chromatography reagents. Determination drip platinum, selenium, nitrite and nitrate. Reductant. Manufacturing ferrite. Clean water. Polymerization catalyst. Photographic plate. Restore the principle of ferrous sulfate, ferrous sulfate is used as a large number of reductant, mainly the reduction of chromate in cement. Containing hexavalent chromium reduction method commonly used wastewater processing. Principle: Under acidic conditions, the price reduction of hydrazine hydrate, adding ferrous sulfate reducing agent, sodium sulfite, sodium bisulfite, sulfur dioxide and other hexavalent chromium to trivalent chromium, and then adding sodium hydroxide, calcium hydroxide, lime adjusting the pH of hydrazine hydrate and other pesticides used to generate trivalent chromium hydroxide precipitate is separated from the wastewater. In this reaction, the oxidizing agent is Cl2, the reducing agent is Cl2, the present reaction is a disproportionation reaction. [3] hydrazine hydrate: there is a change in the valence of the redox reaction, the valency of the substance from low to high is called a reducing agent, do antioxidant, a reducing, is oxidized, the product is called its oxidation products. Reducing agent is a relative concept, because the same substance may react with different substances, showing the characteristics of reducing or oxidizing agents. Such as: SO2 + 2HNO3 → H2SO4 + 2H2O + NO2 reaction of the SO2 is a reducing agent. But in H2S + SO2 → S + H2O in, SO2 is an oxidizer. Hydrazine hydrate pesticide use, Wei Connaught Chemical (certified), hydrazine hydrate is provided by Qingdao Wei Connaught Chemical Co. Qingdao Wei Connaught Chemical Co. (www.qdweinuo.com) is Qingdao, 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 Wei Connaught Chemical leadership with the staff warmly welcome all inquiries negotiations to create great promise a better future for the chemical.