Physical properties of ethylene glycol: freezing point: -12.6 ℃ Boiling point: 197.3 ℃ density: relative density (water = 1) 1.1155 (20 ℃); relative density (air = 1) 2.14 Appearance: colorless, sweet, viscous liquid vapor pressure: 0.06mmHg (0.06 mm Hg) / 20 ℃ Flash point: 111.1 ℃ Viscosity: 25.66mPa.s (16 ℃) [1] Solubility: water / ethanol / acetone / acetic acid glycerol pyridine mixed soluble, slightly soluble in ether, insoluble in petroleum hydrocarbons and oils, ethylene glycol, can dissolve calcium / zinc chloride / sodium / potassium / chloride / potassium iodide / potassium hydroxide and other inorganic glycol When used as a refrigerant carrier should be noted: 1. freezing point with an aqueous solution of ethylene glycol in a concentration variation and change, when the concentration of 60%, the freezing point of the aqueous solution to reduce the concentration of ethylene glycol, but the concentration of more than 60 After%, with the glycol concentration increased, the freezing point of an upward trend, the viscosity will increase as the concentration increases. When the concentration reached 99.9 percent, rising to its freezing point -13.2 ℃, which is concentrated antifreeze (antifreeze liquor) an important reason why ethylene plant can not be directly used, must draw the user's attention. Hydroxyl group-containing ethylene glycol plant 2, -90 ° C 80 ° C under the long-term work, will first be oxidized to ethylene glycol, glycolic acid, and then oxidized to the acid, i.e., acetic acid (oxalic acid) containing 2 carboxyl group. 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 a polymer, the polymer is further oxidized into organic acids (commonly referred to as sludge) is formed of a very sticky material, easy to scale after deposition; another B diol reacts with oxygen to produce small amounts of formic acid and acetic acid Wei promise chemicals, chemical raw materials manufacturer Qingdao _ ethylene glycol plant _ provided by Wei Connaught Chemical. Search for "phenol, aniline, ethylenediamine, n-butanol, isobutanol, n-propanol, isopropanol, methanol," fly suppliers, network operators choose to have a full alliance Certified: Qingdao Wei Connaught Chemical Co. ( www.qdweinuo.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!