Model level products imported polyester grade grade product content ≥99.9 (%) Manufacturers (Origin) Shell product name glycol density 1.1134 (20 / 4c) (g / cm3) Implementation of quality standards ASTM Packing bulk water glycol support online ordering , bottled water CAS107-21-1 0.05% m / m max chroma 5MAX diethylene glycol content of 0.05% m / m MAX glycol colorless viscous liquid, sweet, hygroscopic glycol, flammable . Boiling point of 198 ℃. Soluble in water, acetic acid, ketones, aldehydes, lower aliphatic alcohols, glycerol, pyridine and similar coal tar bases, ether-soluble and insoluble in benzene and its homologues, chlorinated hydrocarbons, petroleum ether and oils. 1. Simple structure: HO-CH2-CH2-OH Formula: C2H6O2 Molecular weight: 62.07 (according to 1997 international atomic mass) 2, Type: ethylene at room temperature is a colorless, odorless, sweet viscous liquid. The proportion of 1.1132, the boiling point of 197.2 ℃ glycol can be purchased in small quantities, the freezing point of -12.6 ℃, flash point 116 ℃, ignition point 412 ℃, the upper explosive limit of 3.2% ~ 15.3% (volume). Hygroscopic, miscible with water, ethanol and acetone, can greatly reduce the freezing point of water, slightly soluble in ether. 3, production methods: ethylene oxide from ethylene oxide in the catalytic silver, then by hydration of ethylene oxide glycol distillation system. 4. Purpose: The main 5, the implementation of standards: GB 4649-93 Index Name Index Excellent grade First grade Qualified Appearance colorless transparent colorless transparent without mechanical impurities without mechanical impurities colorless or slightly yellow no mechanical impurities platinum - cobalt color Degree: Before heating, heated hydrochloric acid number ≤ dedicated glycol antifreeze, number ≤ 5 20 15 - 40 - Density (20 ℃), g / cm31.1128 ~ 1.1138 1.1125 ~ 1.1140 1.1120 ~ 1.1150 boiling range (0 ℃ , 0.10133MPa) initial boiling point, ℃ ≥ dry point, ℃ ≤ 196 dedicated glycol antifreeze, Wan Jing Feng Chemical (certified), Jiangmen glycol provided by the Guangzhou City Jing Feng Trading Co., Ltd .. Guangzhou Wan Jing Feng Trading Co. (www.wanjingfeng.com.cn) (www.fangzhizhuji.com) is Guangzhou, 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 Wan Jing Feng Chemical leadership with the staff warmly welcome all inquiries negotiations to create Wan Jing Feng Chemical better future.