When ethylene glycol is used as refrigerant carrier should be noted: a concentration change its freezing point with ethylene glycol in the aqueous solution varies ethylene glycol, at a concentration of 60% or less, the concentration of the aqueous solution of ethylene glycol liters high freezing point depression, but more than 60% in the concentration of ethylene glycol, ethylene glycol concentration increased with its freezing point rise, the viscosity will increase as the concentration increases. When the concentration of 99.9%, the freezing point of ethylene glycol prices rose to -13.2 ℃, which is concentrated antifreeze (antifreeze liquor) an important reason why can not be directly used, must draw the user's attention. 2. glycol containing a hydroxyl group, a long work at 80 degrees C -90 degrees C, ethylene glycol will first be oxidized to glycolic acid, and then is oxidized to oxalic acid, i.e. acetic acid (oxalic acid), containing two carboxyl groups. Oxalic acid and its byproducts will first affect the central nervous system, followed by the heart, and then affect the kidneys. If there is no proper treatment, excessive intake of ethylene glycol can cause death. Glycol oxalic acid, causing corrosion of the equipment that make them leak. Thus, in the preparation of antifreeze, you must also have a preservative to prevent the formation of iron and steel, aluminum corrosion and scale. 3. glycol itself is relatively active substance, readily polymerized into the polymer, the polymer is further oxidized into organic acids (commonly referred to as sludge), forming a very sticky material, after deposition easy to scale; the other B diol reacts with oxygen to produce small amounts of formic acid and ethylene glycol: Fire-fighting measures hazardous characteristics: its vapor and air can form explosive mixtures of ethylene glycol hygroscopic plasticizer case of fire, explosion fever burns easily. It can react with oxidants. Its vapor is heavier than air and can spread to the lower Department of considerable local, fire source will fire back. In case of high fever, increased pressure within containers, cracking and the risk of explosion. Hazardous combustion products: carbon monoxide, carbon dioxide. Fire fighting methods: as far as possible to move containers from the scene empty Department. Water cooling containers to keep the fire until the end of fire. At the scene of the container if any, change in sound from the safety relief valve, all personnel must evacuate immediately. Extinguishing Media: resistant foam, carbon dioxide, dry, sandy soil. Water fire invalid. [4] Ingestion: drink plenty of water, induce vomiting. Medical treatment. Glycol prices, Jimo glycol, Wei Wei Connaught Chemical provided by Qingdao Sino Chemical Company. Qingdao Wei Connaught Chemical Co. (www.qdweinuo.com) strong, credible, in Qingdao, Shandong and other chemical products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wei Connaught Chemical and you hand into the brilliant, for a better future!