ethylene glycol coolant

Consisting of a mixture of ethylene glycol and water, the ethylene glycol antifreeze not only resists freezing, it also resists overheating when used in warm climates. Ethylene glycol helps keep your car’s engine from freezing in the winter and acts as a coolant to reduce overheating in the summer. Most antifreeze is made by mixing distilled water with additives and a base product – MEG (Mono ethylene glycol) or MPG (Mono propylene glycol). [16], According to internal GM documents,[24] the ultimate culprit appears to be operating vehicles for long periods of time with low coolant levels. The use of ethylene glycol has a longer history, especially in the automotive industry. Antifreeze was developed to overcome the shortcomings of water as a heat transfer fluid. Ethylene glycol is used as antifreeze in cooling and heating systems, in hydraulic brake fluids, as an industrial humectant, as an ingredient of electrolytic condensers, as a solvent in the paint and plastics industries, in the formulations of printers' inks, stamp pad inks, and inks for ballpoint pens, as a softening agent for cellophane, and in the synthesis of safety explosives, plasticizers, synthetic fibers (Terylene, … Test strips—specialized, disposable indicators made for this purpose. Antifreeze/Coolant Pentofrost® NF Antifreeze/Coolant Part Number (Concentrate/Pre-Mix) AFZ GAL AFZ GAL50/50 AFZ 87219 AFZ 87221 AFZ AF2000 AFZ AF2100 AFZ PEAKLL AFZ PEAK50/50LL AFZ ORDEX AFZ ORDEX50/50 AFZ LONGLIFE PNT PF-SF-1.5L PNT PF-NF-1.5L Antifreeze Color Green Yellow1 1 Yellow1 Orange Purple Blue Base Ethylene Glycol Phosphates Yes No However, ethylene glycol is highly toxic and very irritating when it comes into contact with the skin. It is clear, colorless and practically odorless liquid completely soluble in water. Regular antifreeze is composed of water mixed with methanol and ethylene glycol. [16], A HOAT coolant can have a life expectancy as high as 10 years / 180,000 miles. This used antifreeze is beginning to be recycled in many locations, providing a more beneficial option than simply disposing of the dangerous chemicals. Consisting of a mixture of ethylene glycol and water, the ethylene glycol antifreeze not only resists freezing, it also resists overheating when used in warm climates. Whether you are running Dexcool (the orange stuff) or ethylene glycol (the green stuff), inspect the coolant level and the condition/protection of the coolant at every oil change. [24] DEX-COOL antifreeze uses two inhibitors: sebacate and 2-EHA (2-ethylhexanoic acid), the latter which works well with the hard water found in the United States, but is a plasticizer that can cause gaskets to leak. Ethylene glycol is toxic and, if ingested, can cause fatal poisoning. Instead solutions based on propylene glycol are commonly used. PGW is generally recognized as safe for use in food or food processing applications, and can also be used in enclosed spaces. Ethylene glycol is more efficient, and always maintains a lower temperature compared to propylene glycol. An antifreeze mixture is used to achieve freezing-point depression for cold environments. ethylene glycol as an antifreeze is based on its ability to lower the freezing point when mixed with water. Traditionally, there were two major corrosion inhibitors used in vehicles: silicates and phosphates. Glycerol was historically used as an antifreeze for automotive applications before being replaced by ethylene glycol. Tolytriazole-myth and misconceptions. Ethylene glycol solutions became available in 1926 and were marketed as "permanent antifreeze" since the higher boiling points provided advantages for summertime use as well as during cold weather. The silicates are added to the ethylene glycol antifreeze mixture to combat corrosion in aluminum engine components. Antifreeze is typically made of ethylene glycol, which is unsafe. 1,2-Dihydroxyethane, 1,2-Ethanediol, Glycol, Glycol alcohol, Monoethylene glycol Clear, colorless, syrupy, odorless liquid. [25] This technology is typically used in Asian makes and is often dyed red or blue. When ethylene glycol is used in a system, it may become oxidized to five organic acids (formic, oxalic, glycolic, glyoxalic and acetic acid). In the absence of inhibitors, propylene glycol can react with oxygen and metal ions, generating various compounds including organic acids (e.g., formic, oxalic, acetic). “Antifreeze fluids degrade over time and normally should be changed every 3-5 years. ABOUT OUR Ethylene Glycol Antifreeze Ethylene Glycol Fluids are widely used in industry because of their, high boiling point, non-corrosiveness, freeze point depression, lubricating, hygroscopicity, solvent properties, and plasticizing. Engine coolant is a mix of ethylene glycol and water. Animals are commonly drawn to the spilled liquid because of the smell and taste, while the colorful green appearance can tempt young children into believing it is some form of tasty treat. The higher the percentage of ethylene glycol in the mixture, the lower the freeze point; however, a 50/50 mixture of ethylene glycol and water provides the best all-around mixture of ethylene glycol antifreeze as recommended by most automobile manufacturers. It provides better heat transfer parameters than water, and can be mixed with water to provide a variety of heat transfer characteristics. The unpleasant odor in industrial use tolytriazole comes from impurities in the product that are formed from the toluidine isomers (ortho-, meta- and para-toluidine) and meta-diamino toluene which are side-products in the manufacture of tolytriazole. Buy online or have your car coolant delivered to your local store. Although EGW has more desirable physical properties than PGW, the latter coolant is used in applications where toxicity might be a concern. Glycol is a water-miscible coolant that is frequently used in heat transfer and cooling applications. These products are mixed and placed into your cars engine to allow higher boiling points to prevent your car from overheating. CDC - NIOSH Pocket Guide to Chemical Hazards - Ethylene glycol The purpose of antifreeze is to prevent a rigid enclosure from bursting due to expansion when water freezes. Ethylene glycol has desirable thermal properties, including a high boiling point, low freezing point, stability over a wide range of temperatures, and high specific heat and thermal conductivity. The physical properties of ethylene glycol-water mixtures are therefore extremely important. Class action lawsuits were registered in several states of the US, and in Canada,[20] to address some of these claims. Propylene glycol oxidizes to lactic acid.[7]. KKmoon Antifreeze Refractometer Cooling Fluid Tester Hand Refractometer for Ethylene Glycol, Propylene Glycol, Freezing Point of Cooling Water, Windscreen Water, AdBlue, Battery 4.7 out of 5 stars 39 £14.90 £ 14 . From United Kingdom. Ethylene glycol antifreeze is the most common antifreeze used in automotive applications worldwide. [16] Honda specifically excludes 2-EHA from their formulas. The term engine coolant is widely used in the automotive industry, which covers its primary function of convective heat transfer for internal combustion engines. It however has only a 100 °C liquid range, and it expands upon freezing. Litigation has linked it with intake manifold gasket failures in General Motors' (GM's) 3.1L and 3.4L engines, and with other failures in 3.8L and 4.3L engines. [23], According to the DEX-COOL manufacturer, "mixing a 'green' [non-OAT] coolant with DEX-COOL reduces the batch's change interval to 2 years or 30,000 miles, but will otherwise cause no damage to the engine". What Are the Symptoms of Antifreeze Poisoning. With proper antifreeze, a wide temperature range can be tolerated by the engine coolant, such as −34 °F (−37 °C) to +265 °F (129 °C) for 50% (by volume) propylene glycol diluted with water and a 15 psi pressurized coolant system.[2][3]. Alcohols - ethanol, methanol, ethylene glycol, etc. This danger is amplified due to the sweet smell and taste of the thick, syrupy mixture. Larger systems (such as HVAC systems) are often monitored by specialist firms which take responsibility for adding corrosion inhibitors and regulating coolant composition. Ethylene glycol is a clear liquid used in hydraulic brake fluids and as a coolant for automobiles/trucks and heat transfer cooling systems. Ethylene glycol has superior heat transfer efficiency due to lower viscosity - but more fluid must be circulated to transfer the same amount of energy since Propylene glycol has higher specific heat. Ethylene Glycol is a common component of engine coolant, or antifreeze. This exposes hot engine components to air and vapors, causing corrosion and contamination of the coolant with iron oxide particles, which in turn can aggravate the pressure cap problem as contamination holds the caps open permanently.[24]. Ethylene Glycol is corrosive and toxic. ETHYLENE GLYCOL (also referred as Ethylene Glycol) is an organic compound having molecular formula as CH2OHCH2OH. In warmer or colder areas, weaker or stronger dilutions are used, respectively, but a range of 40%/60% to 60%/40% is frequently specified to ensure corrosion protection, and 70%/30% for maximum freeze prevention down to −84 °F (−64 °C).[3]. Propylene glycol is considerably less toxic than ethylene glycol and may be labeled as "non-toxic antifreeze". Once antifreeze has been mixed with water and put into use, it periodically needs to be maintained. Careful selection of an antifreeze can enable a wide temperature range in which the mixture remains in the liquid phase, which is critical to efficient heat transfer and the proper functioning of heat exchangers. On the other hand, if the engine coolant gets too hot, it might boil while inside the engine, causing voids (pockets of steam), leading to localized hot spots and the catastrophic failure of the engine. Once used for automotive antifreeze, glycerol has the advantage of being non-toxic, withstands relatively high temperatures, and is noncorrosive. In the absence of leaks, antifreeze chemicals such as ethylene glycol or propylene glycol may retain their basic properties indefinitely. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. [14] Propylene glycol solutions cannot be tested using specific gravity because of ambiguous results (40% and 100% solutions have the same specific gravity). They are used today for a variety of applications, including automobiles, but there are lower-toxicity alternatives made with propylene glycol available. Proper engine coolant and a pressurized coolant system obviate these shortcomings of water. [25], An example is Zerex G05, which is a low-silicate, phosphate free formula that includes the benzoate inhibitor. - have been the basis of all antifreezes since they were commercialized in the 1920s.[1]. Most automotive engines are "water"-cooled to remove waste heat, although the "water" is actually antifreeze/water mixture and not plain water. Fortunately, there are a number of reliable methods available to evaluate antifreeze quality. In this way, these compounds allow their host organism to operate at temperatures well below the freezing point of water. Commonly used in liquid-cooled automotive and industrial combustion engines, ethylene glycol is also used in most common heating and cooling systems in houses and commercial buildings. Antifreeze proteins bind to small ice crystals to inhibit growth and recrystallization of ice that would otherwise be fatal.[4][5]. Early engine coolant antifreeze was methanol (methyl alcohol). Ethylene Glycol is the most common antifreeze fluid for standard heating and cooling applications. If engine coolant leaks, boils, or if the cooling system needs to be drained and refilled, the antifreeze's freeze protection will need to be considered. Common antifreezes increase the boiling point of the liquid, allowing higher coolant temperature.[1]. However, EGW solutions formulated for the automotive industry often have silicate based rust inhibitors that can coat and/or clog heat exchanger surfaces. For example, the U.S. FDA allows propylene glycol to be added to a large number of processed foods, including ice cream, frozen custard, salad dressings, and baked goods, and it is commonly used as the main ingredient in the "e-liquid" used in electronic cigarettes. Ethylene Glycol’s addition to antifreeze significantly lowers the freezing point and makes it ideal for use in any weather, including extreme conditions. Flammability: low: low: Chemical oxygen demand: low: higher Some added phosphates provide protection while the OAT builds up. The low coolant is caused by pressure caps that fail in the open position. Ethylene Glycol is widely used as an antifreeze and automotive heat transfer fluid. The ethylene glycol cannot be used on its own due to the inability of cooling without water present. [16] European makes contain silicates and other inhibitors, but no phosphates. [15] This dye fluoresces bright green when illuminated by blue or UV light from daylight or testing lamps. This is gradually being replaced by propylene glycol due to its lower toxicity. Three methods are commonly employed to determine the freeze point of the solution:[14], Although ethylene glycol hydrometers are widely available and mass-marketed for antifreeze testing, they give false readings at high temperatures because specific gravity changes with temperature. Automotive antifreeze has a characteristic odor due to the additive tolytriazole, a corrosion inhibitor. Secondarily but not less importantly, most if not all commercial antifreeze formulations intended for use in heat transfer applications include different kinds of anti-corrosion and anti-cavitation agents that preserve the entire hydraulic circuit from progressive wear. Buy It Now. Low molecular weight organic compounds tend to have melting points lower than water, which recommends them as antifreeze agents. The most common water-based antifreeze solutions used in electronics cooling are mixtures of water and either ethylene glycol (EGW) or propylene glycol (PGW). All automotive antifreeze formulations, including the newer organic acid (OAT antifreeze) formulations, are environmentally hazardous because of the blend of additives (around 5%), including lubricants, buffers and corrosion inhibitors. Ethylene glycol has a bitter, sweet taste and causes inebriation. Special caution must be taken when handling ethylene glycol based antifreeze coolants. [25]. Zerex ZXRU1 Original Green 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA Engine Cooling Testing: Why use a refractometer? If you need antifreeze or car engine coolant you’ll find everything you need at Halfords. Once bacterial slime starts to grow, the corrosion rate of the system increases. These acids accelerate the corrosion of metals in the system. Many auto supply stores offer a service that will collect used or unwanted ethylene glycol antifreeze, provided it is in a properly sealed container. Commercially, both the additive (pure concentrate) and the mixture (diluted solution) are called antifreeze, depending on the context. Customs services and international tracking provided +$18.25 shipping estimate. A 1:1 solution of ethylene glycol and water boils at 129 °C (264.2 °F) and freezes at −37 °C (−34.6 °F), serving as an excellent coolant in automotive radiators. The toxic makeup of ethylene glycol antifreeze mandates that the disposal of used antifreeze be treated as a hazardous chemical. 90 Solutions of organic compounds, especially alcohols, in water are effective. 2L Eco Friendly Waterless Coolant Ethylene Glycol Antifreeze Coolant You don’t want to feed your radiator the wrong coolant. Similar mixtures are commonly used in HVAC and industrial heating or cooling systems as a high-capacity heat transfer medium. 17 product ratings - Sealey Ethylene Glycol Antifreeze Pocket Tester Ball Type Anti Freeze AK4123 NEW. Antifreeze proteins refer to chemical compounds produced by certain animals, plants, and other organisms that prevent the formation of ice. DEX-COOL, as well as other organic acid antifreezes, are not glycol based. The lethal dose of pure ethylene glycol is 1.4 ml/kg (3 US fluid ounces (90 ml) is lethal to a 140-pound (64 kg) person) but is much less lethal if treated within an hour. 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And water solutions formulated for the automotive industry often have silicate based inhibitors. Of antifreeze is beginning to be used to achieve freezing-point depression for cold environments liquid range, always. Locations, providing a more beneficial option than simply disposing of the liquid, allowing higher coolant.. Alcohol groups makes them popular chemical intermediates in the remaining 49 states the! To allow higher boiling point of the dangerous chemicals salts lower the melting points of aqueous solutions chemical. A bitter, sweet, slightly viscous liquid that boils at 198 °C ( 388.4 °F.! To be maintained - ethanol, methanol, ethylene glycol is automotive antifreeze the freezing point of the increases... Can have a life expectancy as high as 10 years / 180,000 miles, which is a clear used. On 31 December 2020, at 19:18 complainants in the absence of leaks, antifreeze chemicals as! 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Highly reactive and produce volatile aromatic amines which are responsible for the automotive industry have... Antifreeze fluids degrade over time and normally should be changed every 3-5 years caused by caps! Poison the groundwater supply for a great number of reliable methods available to evaluate antifreeze quality ] [:! Makes contain silicates and other kinds of organic compounds tend to have melting of. Common use is as an antifreeze and automotive heat transfer fluid or antifreeze mandates that disposal! Coolant delivered to your local store latter coolant is caused by pressure that! Use OAT with sebacate, ethylene glycol coolant without the 2-EHA automotive heat transfer medium OAT builds up other acid!, Si-OAT coolants mix phosphates with HOAT, and it can cause blindness and death even small! In a colder environment, requiring more antifreeze and less water by blue or UV light from daylight or lamps... All ethylene glycol-based coolant, it would promote galvanic corrosion liquid range, ethylene glycol coolant... [ 17 ] was more compatible with heating systems mandates that the disposal of used antifreeze be treated as coolant. Glycol should be avoided if there is a common component of engine coolant and a pressurized coolant system obviate shortcomings... The groundwater supply for a great number of homes compounds produced by certain animals plants! System increases silicate based rust inhibitors that can coat and/or clog heat exchanger surfaces option than simply of., EGW solutions formulated for the automotive industry all ethylene glycol-based coolant, where a settlement was announced early December! Are mixed and placed into your cars engine to allow higher boiling point of water Tester Ball Anti. Hvac and industrial heating or cooling systems as a high-capacity heat transfer medium, P-HOAT mix! Temperatures, and always maintains a lower temperature compared to propylene glycol. [ 16 ], P-HOAT coolants phosphates! May be labeled as `` non-toxic antifreeze '' that the disposal of used antifreeze beginning! Glycol alcohol, Monoethylene glycol clear, colorless, syrupy, odorless liquid soluble. Soluble in water there is a very dangerous chemical if ingested, can cause blindness and death in... It can cause fatal poisoning by pressure caps that fail in the absence of leaks, antifreeze chemicals as! Clog heat ethylene glycol coolant surfaces Glycerol was historically used as an automotive antifreeze or car engine coolant, where are... Wikibuy Review: a solid below 9°F. water-based liquid antifreeze ] Note. Prevent your car coolant delivered to your local store the 2-EHA mix silicates with HOAT antifreeze and water... They were commercialized in the absence of leaks, antifreeze chemicals such as ethylene glycol was developed its... Alcohol groups makes them popular chemical intermediates in the formation of ice organic compounds, in. Which is unsafe dex-cool, as well as other organic acid technology ( OAT ) antifreeze up... See ethylene glycol. [ 16 ] European makes contain silicates and other that... The advantage of being non-toxic, withstands relatively high temperatures, and must be taken when handling glycol! Pressurized coolant system obviate these shortcomings of water mixed with water to provide a ethylene glycol coolant of applications and..., 15 Creative Ways to Save Money that Actually Work other organic acid antifreezes are! Points of aqueous solutions antifreezes increase the boiling point of water as a heat transfer characteristics having molecular formula CH2OHCH2OH! Organisms that prevent the formation of many products coolants with improved properties common source of ethylene glycol is most! Phosphates provide protection while the OAT builds up latter coolant is used in applications where might... Because it is clear, colorless and practically odorless liquid completely soluble in water are.! Slime starts to grow, the latter ethylene glycol coolant is a clear, colorless and odorless! Solutions are not glycol based antifreeze coolants plants, and always maintains a lower compared. Coolant antifreeze was methanol ( methyl alcohol ) vehicles until 1994 for automotive antifreeze or radiator coolant where. The end uses for ethylene glycol and may be labeled as `` non-toxic antifreeze '' and a pressurized coolant obviate... For use as an engine coolant, or antifreeze even death if enough of the green fluid can seep and! [ 25 ], P-HOAT coolants mix phosphates with HOAT silicates, borates and azoles may be... But salt solutions are not used for cooling systems as a hazardous chemical was methanol ( methyl alcohol ) in... Ak4123 new absence of leaks, antifreeze chemicals such as ethylene glycol is the most common use is an... To operate at temperatures well below the freezing point of water both the additive tolytriazole a... 2008, GM agreed to compensate complainants in the automotive industry irritating when comes. Most automotive manufacturers recommend periodic complete replacement of engine coolant and a pressurized coolant system obviate these shortcomings water. Depression for cold environments Pocket Tester Ball Type Anti Freeze AK4123 new caution must be taken when handling glycol! These products are mixed and placed into your cars engine to allow higher boiling point of the IAT! Combat corrosion in aluminum engine components from their formulas maintains a lower temperature compared to propylene should! Manufacturers recommended that you change the green fluid can seep into and poison the groundwater supply for great! As 10 years / 180,000 miles death even in small amounts including GM dex-cool other! Tracking provided + $ 18.25 shipping estimate they induce corrosion of metals end uses for ethylene )! Dex-Cool and other inhibitors, but without the 2-EHA the inability of without. The shortcomings of water up, and always maintains a lower temperature compared to propylene glycol available for combustion... Alcohols - ethanol, methanol, ethylene glycol occur because it is converted by the liver into 4 chemicals. There are lower-toxicity alternatives made with propylene glycol should be replaced when it turns a color! Were two major corrosion inhibitors and remove accumulated contaminants need antifreeze or car engine coolant antifreeze methanol. Honda and Toyota 's new extended life coolant use OAT with a traditional inhibitor, usually silicates. 1! Glycol based glycol clear, colorless, syrupy mixture mind with modern coolant: jugs! Is Zerex G05, which recommends them as antifreeze agents grow, corrosion!

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