Ethylene glycol; CAS Number: ; EC Number: ; Synonym: 1,2- Ethanediol; Linear Formula: C2H6O2; find Sigma-E MSDS, related. Ethylene glycol; MEG; 1,2-Ethanediol; 1,2-Dihydroxyethane. Recommended Use of the Chemical and Restrictions on Use. Coolant and antifreeze; heat transfer. Ethanediol (Ethylene glycol) MSDS. Section 1: Chemical Product and Company Identification. Product Name: Ethylene glycol. Catalog Codes.
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It is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, sweet-tasting, viscous liquid.
Ethylene glycol is highly toxic. Household pets are especially susceptible to ethylene glycol poisoning from vehicle antifreeze leaks. Ethylene glycol is produced from ethylene ethenevia the intermediate ethylene oxide. Ethylene oxide reacts with water to produce ethylene glycol according to the chemical equation:. This reaction can be catalyzed by either acids or basesor can occur at neutral pH under elevated temperatures.
The highest yields of ethylene glycol occur at acidic or neutral pH with a large excess of water. The major byproducts are the oligomers diethylene glycoltriethylene glycoland tetraethylene glycol.
The separation of these oligomers and water is energy-intensive. The carbon dioxide comes in part from the ethylene oxide production, where a part of the ethylene is completely oxidized. Ethylene glycol is produced from carbon monoxide in countries with large coal reserves and less stringent environmental regulations. The oxidative carbonylation of methanol to dimethyl oxalate provides a promising approach to the production of C 1 -based ethylene glycol. Therefore, only carbon monoxide, hydrogen, and oxygen are consumed.
The caterpillar of the Greater wax moth, Galleria mellonellahas gut bacteria with the ability to degrade polyethylene PE into ethylene glycol. According to most sources, French chemist Charles-Adolphe Wurtz — first prepared ethylene glycol in Wurtz named his new compound “glycol” because it shared qualities with both ethyl alcohol with one hydroxyl group and glycerin with three hydroxyl groups.
In the United States, semicommercial production of ethylene glycol via ethylene chlorohydrin started in Byethylene glycol was being used by almost all dynamite manufacturers.
Ethylene glycol – Wikipedia
InCarbide started up the first plant based on Lefort’s process for vapor-phase oxidation of ethylene to ethylene oxide. Carbide maintained a monopoly on the direct oxidation process untilethanedil the Scientific Design process was ethanedioll and offered for licenses.
The major use of ethylene glycol is as a medium for convective heat transfer in, for example, automobiles and liquid-cooled computers. Ethylene glycol is also commonly used in chilled-water air-conditioning systems that place either the mxds or air handlers outside, or systems that must cool below the freezing temperature of water. The ethylene glycol either gains energy jsds the source lake, ocean, water well or dissipates heat to the sink, depending on whether the system is being used for heating or cooling.
Pure ethylene glycol has a specific heat capacity about one half that of water. So, while providing freeze protection and an increased boiling point, ethylene glycol lowers the specific heat capacity of water mixtures relative to pure water. The formation of large bubbles in cooling passages of internal combustion engines will seriously inhibit heat flow flux from that area, thus allowing nucleation tiny bubbles heat transfer to occur is not advisable. Large bubbles in cooling passages will be self-sustaining or grow sthanediol, with virtually the complete loss of cooling in that spot.
Cooling due to other effects ethanedill as air draft from fan etc. The freezing point depression of some mixtures can be explained as a colligative property of solutions but, in highly-concentrated mixtures such as the example, deviations from ideal solution behavior are expected due to the influence of intermolecular forces. Because of the depressed freezing temperatures, ethylene glycol is used as a de-icing fluid for windshields and aircraft, as an antifreeze in automobile engines, and as a component of vitrification anticrystallization mixtures for low-temperature preservation of biological tissues and organs.
The use of ethylene glycol not only depresses the freezing point of aqueous mixtures, but also elevates their boiling point. Ethanfdiol results in the operating temperature range for heat-transfer fluids being broadened on both ends of the temperature scale.
The increase in boiling temperature is due ethsnediol pure ethylene glycol having a much higher boiling point and lower vapor pressure than pure water, as is typical with most binary mixtures of volatile liquids.
In the plastic industryethylene glycol is an important precursor to polyester fibers and resins. Polyethylene terephthalateused to make plastic bottles for soft drinksis prepared from ethylene glycol. Ethylene glycol is used in the natural gas industry to remove water vapor from natural gas before further processing, in much the same manner as triethylene glycol TEG.
Because of its high boiling point and affinity for water, ethylene glycol is a useful desiccant. Ethylene glycol is widely used to inhibit the formation of natural gas clathrates hydrates in long multiphase pipelines that convey natural gas from remote gas fields to ethannediol gas processing facility.
Ethylene glycol can be recovered from the natural gas and reused as an inhibitor after purification treatment that removes water and inorganic salts. Natural gas is dehydrated msxs ethylene glycol. In this application, ethylene glycol flows down msxs the top of a tower and meets a rising mixture of water vapor and hydrocarbon gases. Dry gas exits from the top of the tower. The glycol and water are separated, and the glycol recycled.
1-Phenyl-1,2-ethanediol() MSDS Melting Point Boiling Point Density Storage Transport
Instead of removing water, ethylene glycol can also be used to depress the temperature at which hydrates are formed. Moreover, the injection rate for hydrate suppression is much lower than the circulation rate in a glycol dehydration tower. Minor ethqnediol of ethylene glycol include the manufacture of capacitors, as etbanediol chemical intermediate in the manufacture of 1,4-dioxaneas an additive to prevent corrosion in liquid cooling systems for personal computersand inside the lens devices of cathode-ray tube type of rear projection televisions.
Ethylene glycol is also used in the manufacture of some fthanediolbut it is not itself present in these injections. Ethylene glycol has seen some use as a rot and fungal treatment for wood, both as a preventative and a treatment after the fact. It has been used in a few cases to ethanedil partially rotted wooden objects to be displayed in museums.
It msdx one of only a few treatments that are ethahediol in dealing with rot in wooden boats, and is relatively cheap. Ethylene glycol may also be one of the minor ingredients in screen cleaning solutions, along with the main ingredient isopropyl alcohol.
Ethylene glycol is commonly used as a preservative for biological specimens, especially in secondary schools during dissection as a safer alternative to formaldehyde. It is also used as part of the water-based hydraulic fluid used to control subsea oil and gas production equipment.
Ethylene glycol is used as a protecting group in organic synthesis to protect carbonyl compounds such as ketones and aldehydes.
Silicon dioxide reacts in heated reflux under dinitrogen with ethylene glycol and an alkali metal base to produce highly reactive, pentacoordinate silicates which provide access to a wide variety of new silicon compounds. Ethylene glycol is used as a protecting group for carbonyl groups in organic synthesis.
Treating a ketone or aldehyde with ethylene glycol in the presence of an acid catalyst e. The 1,3-dioxolane protecting group can thereafter be removed by further acid hydrolysis. Water was removed by azeotropic distillation to shift the equilibrium to the right. Upon ingestion, ethylene glycol is oxidized ethhanediol glycolic acidwhich is, in turn, oxidized to oxalic acidwhich is toxic. It and its toxic byproducts first affect the central ethaneduol systemthen the heart, and finally the kidneys.
Ingestion of sufficient amounts is fatal if untreated. Antifreeze products for automotive use containing propylene glycol in place of ethylene glycol are available.
They are generally considered safer to use, as propylene glycol does not taste as good [note 1] and is converted in the body to lactic acida normal product of metabolism and exercise. Australia, the UK, and seventeen US states as of require the addition of a bitter flavoring denatonium benzoate to antifreeze. In DecemberUS antifreeze manufacturers agreed voluntarily to add a bitter flavoring to all antifreeze that is sold in the consumer market of the US.
Ethylene glycol is a high-production-volume chemical ; it breaks down in air in about 10 days and in water or soil in a few weeks. It enters the environment through the dispersal of ethylene glycol-containing products, especially at airports, where it is used in deicing agents for runways and aeroplanes.
From Wikipedia, the free encyclopedia. Not to be confused with Propylene glycolDiethylene glycolor Glycol.
Ethylene glycol 1,2-Ethanediol Ethylene alcohol Hypodicarbonous acid Msdss glycol 1,2-Dihydroxyethane. Industrial-grade propylene glycol usually has a slightly bitter or acrid taste due to impurities.
See the article on propylene glycol for more information. The relative sweetness of ethylene glycol  and propylene glycol  is discussed in the Merck Index, and neither compound is described as bitter.
Archived from the original on July 14, Elsevier, Ruthenium catalyzed hydrogenation of dimethyl oxalate to ethylene glycolJ. Retrieved April 25, The Organic Synthesis Archive.
Protective Groups in Organic Synthesis Third ed. Retrieved December 30, National Institute for Occupational Safety ethanediool Health. Retrieved December 31, Royal Society of Chemistry. The Rested Dog Inn. Retrieved October 11, Consumer Specialty Products Association. Archived from the original on 28 December Retrieved 30 June Retrieved 27 August Ethylene glycol [ citation needed ].
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