Ethylene glycol is a colorless, slightly viscous liquid boiling point is 197.4 ℃, freezing point is -11.5 ℃, can be mixed with water in any proportion. Due to changes in the vapor pressure of the cooling water, the freezing point significantly reduced after mixing. Degree of reduction within a certain range with the content of the ethylene glycol increases. South China distributor when the content of ethylene glycol was 60%, the freezing point can be lowered to -48.3 ℃, exceeds this limit, the freezing point but to rise. Ethylene glycol antifreeze in the use of easy to produce acidic substances glycol, have a corrosive effect on metal. Glycol toxic, but because of its high boiling point, does not produce steam to be inhaled and cause poisoning. Ethylene glycol absorbent, storage containers should be sealed glycol 99.5 paint additives, to prevent water absorption after overflow. Since the boiling point of water is lower than ethylene glycol, the use of evaporated water, when the lack of coolant, just add water on the line. This antifreeze can be recycled after use (to prevent mixing of petroleum products), through sedimentation, filtration, water was added to adjust the concentration, additional preservatives can continue to use, generally available 3--5 years. But many times you want to filter, to prevent damage to the vehicle. Many people think that a low freezing point of ethylene glycol, the freezing point of antifreeze is ethylene glycol and water mixed in different proportions according to a post and the freezing point, it is not true, due to changes in the mix after the cooling water vapor pressure, freezing point will significantly reduced. Degree of reduction within a certain range with increasing content of ethylene glycol and ethylene glycol decline Guangzhou cheapest, but if more than a certain proportion of the freezing point it will rise. 40% of ethylene glycol and 60% of soft water mixed into antifreeze, the antifreeze temperature is -25 ℃; when ethylene glycol antifreeze and water accounting for 50%, the freezing temperature of -35 ℃. Alias: glycol, ethylene glycol, EG English name: Ethylene glycol CAS: 107-21-1 EINECS: 203-473-3 Molecular formula: C2H6O2 Properties: colorless transparent viscous liquid, sweet, hygroscopic. Boiling point 198 ℃, freezing point -11.5 ℃, the relative density of 1.1088, a refractive index of 1.4318, a flash point of 116 ℃, with water, lower aliphatic alcohols, glycerol, acetic acid, acetone and the like, ketones, aldehydes, pyridine and the like coal tar base class, slightly soluble in ether, almost insoluble in benzene and its homologues Scope: 1, mainly used for polyester fiber polyester raw materials. 2, used as a solvent varnish, dyes, oils and certain inorganic compounds. 3, for the manufacture of a polyester resin, a plasticizer, a surface agent, cold oil, antifreeze and the like.