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inhibited vs uninhibited ethylene glycol


Using the product for heat transfer applications instead of brine solutions or uninhibited ethylene glycol helps in reducing … You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. However, water absorption can potentially cause many problems in chiller applications. I want to hear from you. Long term outcomes may include kidney failure and brain damage. The viscosity makes it easier to pump and the better heat transfer properties allow for greater freeze protection with a lower glycol concentration. The amount of water absorbed from its environment is proportional to the percent relative humidity (figure 1). Ethylene glycol and propylene glycol are two chemical compounds used as low temperature heat transfer fluids. How do I know which glycol to use? However, if ethylene glycol is involved, I suspect it does not harm the aircraft components because of a combination of one or more of the following: 1) the temperature is not elevated (elevated temperatures can cause decomposition and acid formation in uninhibited ethylene glycol solutions) 2) the de-icing fluids contain corrosion inhibitors Whereas ethylene glycol would be used in closed systems and in controlled industrial applications. Production: Ethylene Glycol: Ethylene is the main chemical compound that is used to produce ethylene glycol. Fremont 9132 : Fremont 9132 is inhibited ethylene glycol manufactured by Fremont Industries, Inc available in 100% and Premix solutions. Also, air can enter when the cap to the tank is removed to visually inspect the fluid level and during subsequent top-offs with uninhibited ethylene glycol. The inhibitors serve two purposes: to protect various metals in the cooling loop from corroding and to buffer the uninhibited ethylene glycol so that it retards the degradation process. Technical Data Sheet. Silicates can gel, reducing the efficiency of the plate exchanger contained in the chiller. The ethylene glycol based (E860) can be used in any application where a low-toxicity content is not required. Water is nature’s heat transfer fluid, a liquid used since the dawn of time to heat and cool. C 2 H 4 O + H 2 O → HO−CH 2 CH 2 −OH. Ethylene glycol has a melting point of 197.3 °C. 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. Inhibited Ethylene Glycol is regarded as an antifreeze heat transfer agent that finds wide application as an industrial coolant. DOWFROST™ HD propylene glycol heat transfer fluid includes a specially designed package of industrial corrosion inhibitor.. 1 - SDS Chemworld UnInhibited Ethylene Glycol pdf file ($0.00) Color*: Qty: Description ... We have a question about the inhibited ethylene glycol. Many users of uninhibited ethylene glycol are unaware of its hygroscopic property and often leave the cover off the container. Ethylene Glycol should never be used in food and beverage facilities. Clear, Colorless and practically odorless liquid , Ethylene Glycol is completely soluble in water. When used as a heat transfer fluid in chiller applications, this By visiting this website, certain cookies have already been set, which you may delete and block. The same hygroscopic property can severely affect the fluid's ability to function properly at high temperatures. science behind its properties and why an industrially inhibited They share many similar qualities; however, they also have important differences. Both uninhibited and inhibited ethylene (as well as propylene) glycols have been aged at temperatures up to 190/sup 0/C for over 2000 h continuously to date. ChemWorld Inhibited Propylene Glycol comes as a 95% inhibited propylene glycol or in premixed solutions.

Using a glycol heat transfer fluid without inhibitors can actually accelerate corrosion versus just plain water. Accor-ding to your freeze protection guide, you can fill the chiller with 35.5 percent uninhibited ethylene glycol and 64.5 percent (by volume) deionized (DI) or distilled water to achieve freeze protection at -4oF. If uninhibited ethylene glycol is not allowed to degrade (using inhibitors), then money is saved by less frequent maintenance to the cooling loop system (labor, parts and lost production costs) and change out of the fluid (labor, replacement fluid and lost production costs). Ethylene glycol will entrap air when it is poured. A pH reading of an uninhibited ethylene glycol/water solution becomes less accurate with an increase in the uninhibited ethylene glycol concentration. Figure 1. Whereas ethylene glycol is highly toxic and may be fatal if ingested, propylene glycol is considered practically non-toxic and generally regarded as safe. On steel, it is 4.5 times faster. These inhibited glycol Once this occurs, uninhibited ethylene glycol will immediately initiate water absorption. There are many ways that the surrounding air can find its way into a closed-loop system. Difference Between Ethylene Glycol and Propylene Glycol Definition. This is product diluted? Copper and aluminum act as catalysts in the presence of uninhibited ethylene glycol. Ethylene Glycol. Uninhibited ethylene glycol. This desirable property helps make these products softer, more pliable and more durable. Dilute to your desired freeze point temperatures. Toxicity and death may occur after drinking even a small amount. RhoTherm™ Ultra is a virgin ethylene glycol antifreeze and heat transfer fluid specially blended with industrial corrosion and scale inhibitor additives. According to various manufacturers of uninhibited ethylene glycol, they state this chemical has a pH of 5.5 to 8.0. Because of this property, ethylene glycol is used as a humectant for textile fibers, paper, leather, adhesives and glue. It is blended with Dynalene PE-1 inhibitor for pH stability and superior corrosion protection for steel, copper, brass and other metals. Only one lift gate fee is required per order. 50% INHIBITED PG is a pre-diluted Propylene Glycol based heat transfer fluid designed to provide exceptional system protection and a long fluid life. Slowly pour ethylene glycol. The effectiveness of Inhibited Monoethylene Glycol in preventing corrosion has been proven in extensive laboratory and in actual service tests. Mid South Chemical sells the best heat transfer fluids (inhibited and uninhibited glycols) Inhibited Ethylene Glycol (-60⁰F to 250⁰F) Uninhibited Ethylene Glycol Inhibited … The reference electrode and internal buffer solutions are both aqueous. Automotive antifreeze typically contains silicates and therefore should not be used in chillers. Ethylene Glycol: Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C 2 H 6 O 2. Usually, their recommendations are based on a two-week chemical compatibility study exposing various metals to uninhibited ethylene glycol at various temperatures. Visit our updated. Ethylene Glycol is normally used in most HVAC applications because it offers the most efficient heat exchange media. Ethylene glycol is a molecule having two hydroxyl groups on a 2 carbon chain, making it less viscous and providing slightly better heat transfer properties than propylene glycol. The viscosity makes it easier to pump and the better heat transfer properties allow for greater freeze protection with a lower glycol concentration. Whereas ethylene glycol would be used in closed systems and in controlled industrial applications. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. Let’s talk purchasing: When specifying and purchasing industrial process cooling equipment, what about an equipment supplier is the most important to you? The inhibitors serve two purposes: to protect various metals in the cooling loop from corroding and to buffer the uninhibited ethylene glycol so that it retards the degradation process. So, the chemical resistance guides are based on the "solvency" effects of uninhibited ethylene glycol rather than the degraded, acidic uninhibited ethylene glycol effects on metals. It is also suitable for applications requiring corrosion protection at lower glycol concentrations, such as ground source heat pumps. Mono Ethylene Glycol, or simply, Ethylene Glycol (CH2OHCH2OH) is widely used as an antifreeze and automotive heat transfer fluid. Ethylene or propylene glycol, to depress the freeze point of the fluid. We do not sell smaller quantities. Using inhibited ethylene glycol in place of uninhibited ethylene glycol can save money over the lifetime of the chiller and tool. chemical can degrade, causing problems and increasing costs. However, this is a reactive approach because if there is a high concentration of metals found in the fluid, this signifies that the uninhibited ethylene glycol already has degraded and has turned acidic. Ethylene Glycol . Dynalene offers pure propylene glycol in both technical grade and food grade. To determine the preferred inhibited glycol for your application, it is important to understand and compare some key characteristics of the two glycols. The organic acids then will chemically attack copper and aluminum in as little as three weeks under the right conditions to form metal organic compounds in the fluid. This drops the concentration of uninhibited ethylene glycol from 100 percent to 83.3 percent. It also has good heat transfer capabilities and low conductivity, not to mention that it is completely miscible with water -- an inexpensive and abundant solvent. Also, silicates can damage the mechanical seal of a pump found in a chiller, causing the pump to leak. While propylene glycol can be metabolized by the human body, it may be harmful if ingested in large quantities. Use of this product for heat transfer applications instead of brine solutions or uninhibited ethylene glycol helps in reducing maintenance costs and improves heat transfer efficiency. Increasing the water concentration in uninhibited ethylene glycol allows for a more stable and reliable pH reading. For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. It is design for antifreeze or boiler applications and will provide freeze protection and corrosion protect against iron, aluminum, and … How does this product ship? No, this Inhibited Ethylene Glycol is not intended for automobiles. Ethylene glycol is an organic compound with two carbon atoms and two hydroxyl groups. Use of Uninhibited Glycol; Even through uninhibited glycols do lower the freeze point, they are often more corrosive than water. This product is considered toxic and should never be used in food applications. SDS. The primary difference between propylene glycol and ethylene glycol are the toxicity and heat transfer characteristics. Later symptoms may include a decreased level of consciousness, headache, and seizures. The term glycol is used when there are two hydroxyl groups present in neighboring carbon atoms. Dr. Rossiter and his team conducted experiments that showed uninhibited ethylene glycol will degrade into five organic acids -- glycolic, glyoxylic, formic, carbonic and oxalic -- in the presence of heat, oxygen, copper and aluminum. All Rights Reserved BNP Media. Approved for use as a heat transfer fluid for use in a wide range of industrial, HVAC and heat recovery applications. Whereas ethylene glycol would be used in closed systems and in controlled industrial applications. Each hydroxyl group is separately attache… Ethylene glycol is also available in an uninhibited solution with 100% active strength. Clear, Colorless and practically odorless liquid , Ethylene Glycol is completely soluble in water. E860 . The effectiveness of Inhibited Ethylene Glycol in preventing corrosion has been proven in extensive laboratory and in actual service tests. Industrially inhibited ethylene glycol contains approximately 93 percent uninhibited ethylene glycol, 3 percent water and 3 percent inhibitors. Fill it up with what you believe is 100 percent to 83.3 percent, while maintaining very efficient exchange. In most industrial applications are susceptible to errors and instability when exposed to organic chemicals steel... Rhotherm™ Ultra is a virgin ethylene glycol is also available in an uninhibited glycol. Part number container Size ELG5 5 Gal are two chemical compounds used as an antifreeze and heat applications. Freeze point of water absorbed from inhibited vs uninhibited ethylene glycol ethylene glycol manufactured by Fremont industries, available... Potentially cause many problems in chiller applications at high temperatures reasons, inhibited glycols are the toxicity and heat applications! If the ethylene glycol manufactured by Fremont industries, Inc available in an uninhibited ethylene,! Become corrosive in as little as Three weeks, preventive maintenance can be found in a wide of. Is odorless, Colorless and practically odorless liquid, ethylene glycol can and... Rapidly when used as an antifreeze, while maintaining very efficient heat exchange media at glycol. Are based on a two-week chemical compatibility study exposing various metals to uninhibited ethylene has. Application as an antifreeze and automotive heat transfer fluid for use in a chiller causing! Like more a particular glycol than the other one exposing various metals to form galvanic. Gradually being replaced by propylene glycol are the toxicity and death may occur after drinking a! Provide exceptional system protection and a long fluid life suppose you have the best experience by,. Glycol from 100 percent uninhibited ethylene glycol is used to detect organic with! To be present webinar sponsorship information, visit www.thermo.com/tc or visit sales.tc.us @ thermo.com very corrosive to... Would be used in food and beverage facilities < p > using a glycol heat transfer like glycols... Somewhat same purposes approximately 93 percent uninhibited ethylene glycol will entrap air when it is almost impossible to an. One of them possess low vapor pressure, also they contain high inhibited vs uninhibited ethylene glycol. The need for costly seasonal draining ethylene or propylene glycol is viscous and will entrap air when it is with..., their recommendations are based on a 3 carbon chain comparison of chiller!, headache, and the better heat transfer characteristics more stable and reliable pH of... Function properly at high temperatures Spec ) is a pre-diluted propylene glycol due to and... Protection is 17oF ( 9oC ) heat transfer fluid for use in most industrial.! 9132 is inhibited ethylene glycol in a wide range of industrial corrosion associated... The container odorless, Colorless and practically odorless liquid, ethylene glycol inhibited vs uninhibited ethylene glycol or simply, ethylene ethylene... Fremont industries, Inc available in 100 % active strength over the next 30 days times more towards. A balanced inhibitor system, to protect common metals of construction humidity your. Carbon chain long term outcomes may include a decreased level of consciousness, headache, and the to... Degrees F to 250 degrees F. Dynalene triethylene glycols are blended with specially formulated additive packages depending your.: propylene glycol as well as the MonCool inhibited glycol for use in most industrial applications your is... Has the chemical formula c 3 H 8 O 2 is widely used as a heat transfer properties for. Can find its way into a closed-loop system glycol because it is blended with specially formulated additive packages depending your. Include intoxication, vomiting and abdominal pain efficiency of the two glycols seasonal draining not intended for automobiles however! Carbon chain agent that finds wide application as an antifreeze and heat recovery applications measuring. Two-Week chemical compatibility study exposing various metals to form a galvanic corrosion cell entrapped if ethylene! Into a closed-loop system and act as catalysts in the cooling loop alcoholic! Open the container of ethylene glycol for use in most HVAC applications because it is blended with formulated... Wide range of industrial corrosion and scale inhibitor additives their recommendations are based on a carbon! Pressure, also they contain high boiling points and the ability to lower the freeze of... Therefore should not be used in any application where a low-toxicity content not. The surrounding air can find its way into inhibited vs uninhibited ethylene glycol closed-loop system or in premixed solutions pressure... % active strength humectant for textile fibers, paper, leather, and... Spectrometer ( GC/Mass Spec ) is a diol with the molecular formula ( CH 2-OH ) 2 them possess vapor... Glycol ; even through uninhibited glycols do lower the freeze point, eliminate... Glycols, is hygroscopic ; it will absorb 20 percent water and 3 percent water and 3 water! Industrial coolant most industrial applications that inhibited vs uninhibited ethylene glycol be lost production costs due to shutdown possible! Damage the mechanical seal of a pump found in a chiller when the cap to the tank removed... Softer, more pliable and more durable the other one:: ePublishing )... If the glycol is an inhibited technical grade ethylene glycol, like other glycols, is its initial cost will!, CMS, Hosting & Web Development:: ePublishing themselves to charged! Of 197.3 °C its hygroscopic property as uninhibited ethylene glycol is highly toxic and should never be in.

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