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ethylene glycol vs propylene glycol

Normal Operation – During normal operation you do NOT want to operate with propylene glycol as this coolant does not have the same density and therefore heat transfer capacity as ethylene glycol. Propylene glycol fluids are often selected because of their low acute oral toxicity vs. the moderate acute oral toxicity of ethylene glycols. Propylene alcohol serves the main purpose of absorbing water. Further ethylene glycol is useful as industrial humectants, in hydraulic brake fluid, and as an ingredient of electrolytic condensers. Even the electronic cigarettes that DO utilize polyethylene glycol (PEG) come nowhere near this mark. Ethylene Glycol: IUPAC name for Ethylene glycol is Ethane-1,2-diol. 3. Ethylene Glycol: The molar mass of Ethylene glycol is about 62.07 g/mol. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Bahan antara adalah etilen oksida dan, … Information : Question: I want to use ethylene glycol or propylene glycol as an anti-freeze. Propylene Glycol: Propylene glycol is moderately toxic. Propylene glycol is essentially nontoxic in amounts that may typically be expected to be accidentally ingested. Ethylene glycol is produced when a reaction takes place between the ethylene oxide and water. There is also Propylene-Glycol (which itself is non-toxic and is used as a food additive) and water (PGW). What is the Difference Between Ethylene Glycol and Propylene Glycol      – Comparison of Key Differences, Key Terms: Automotive Antifreeze, Chiral Carbon, Ethylene Glycol, Hygroscopic, Propylene Glycol, Racemic Mixture. Ethylene glycol and propylene glycol are organic compounds. Its molar mass is 62.07 g mol1. The molar mass of propylene glycol is about 76.1 g/mol. Operationally, EG-based fluids perform better. Additionally, Here are some of the advantages they list for propylene glycol: 1.non-poisonous 2. cools better because it's not as dense 3. better corrosion protection (ethylene glycol breaks down to oxalic acid which is very corrosive.) Answer: The freezing points of these glycol solutions can be found in the tables below: What are the freezing points of various aqueous solutions of these chemicals? Figure 2:  3D Ball and Stick Model for Propylene Glycol. Propylene has the chemical formula C3H8O2. The molar mass of this compound is about 62.07 g/mol. Ethylene glycol adalah cairan yang tidak berbau, tidak berwarna, berasa manis dan seperti sirup. Their molecular formulas are different; thus they have some different physical properties. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. It produces ethylene glycol when processed. Both ethylene glycol and propylene glycol are alcoholic compounds which have two –OH groups per molecule. Boiling point of propylene glycol is 188.2 °C. Similar to ethylene glycol, when inhibited, these glycols also protect HVAC systems against damage from corrosion. Ethylene glycol is useful as antifreeze in cooling and heating systems. When a reaction takes place between ethylene oxide with water, the ethylene glycol oligomers or the ethylene glycol, it gives rise to polyethylene glycol. It is important that the … Propylene glycol is less toxic and is considered when toxicity is a concern. It has a chiral carbon (3rd carbon atom), therefore, propylene glycol exists in two stereoisomers. Propylene Glycol: The molar mass of Propylene glycol is about 76.10 g/mol. Ethylene Glycol: Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C2H6O2. Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C2H6O2. Propyelene glycol is miscible with water as well as with chloroform and acetone. 1. Propyelene glycol is miscible with water as well as with chloroform and acetone. Propylene glycol rarely causes toxic effects, and then only under very unusual circumstances. It is miscible with water. PubChem Compound Database, U.S. National Library of Medicine, Available here. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Less EG is required to produce the same freezing point as PG. It is in the ink used by printers, and in stamp pad ink, Ballpoint pens etc. Uses. The boiling point of this liquid is about 198 °C. In “1,2-Propanediol.” National Center for Biotechnology Information. However, when considered the uses, both are used for somewhat same purposes. The specific EG and PG reaction steps utilized in this case study are described in Appendix 5. It is also used as a humectants food additive, as an emulsification agent, as antifreeze, as a fluid in hydraulic presses, as a moisturizer in medicine, as a coolant, as a lubricant. 30% propylene glycol has a freeze point of 8°F but the burst point is -18°F. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. Temperature, °F Ethylene Glycol Propylene Glycol Difference 0 30 103 3 x EC –20 63 400 6 x EC –40 170 1500 9 x EC In addition to these low-temperature pumping considerations, the higher viscosity of propylene glycol over the entire operating temperature range translates to lower heat transfer. Ethylene Glycol Ethers versus Propylene Glycol Ethers The members of this category are glycol ethers derived from ethylene glycol, diethylene glycol, and triethylene glycol. Propylene glycol is hygroscopic. Ethylene glycol is commonly used in applications where efficiency is important and there is no human or animal contact due to the toxicity of the ethylene glycol chemistry. 2,3-butanediol, often found in the plasma of alcoholics, can be mistakenly identified as ethylene glycol when the analysis is performed by gas chromatography (Jones, Nilsson et al. Ethylene glycol has two carbon atoms, and propylene glycol has three carbon atoms per molecule. This molecule has so many uses. Home » Science » Chemistry » Organic Chemistry » Difference Between Ethylene Glycol and Propylene Glycol. This category does not contain glycol ethers based on propylene glycol, dipropylene glycol, or tripropylene glycol. There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. Ethylene glycol is toxic to humans and other mammals. This indicates that propylene glycol has two –OH groups. These questions ultimately affect the mixture ratio of the glycol. Propylene glycol is a viscous liquid without an odor or a color. However, advanced methods can be used to obtain pure isomer out of the racemic mixture. The tests showed that the performance of 50/50 PG/water is degraded at higher flow rates to a greater degree than either 50/50 EG/water or 100% water. Propylene glycol is also an organic molecule with two hydroxyl groups, but it has three carbon atoms. Since there is a chiral carbon (asymmetric carbon) in propylene glycol molecule, the synthesized product is always a racemic mixture of two enantiomers. All nylon strainer bowls should be removed after the ethylene glycol is circulated. It is miscible with water. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. Individually Listed Glycol … 1993; Hilliard, Robinson et al. Even a small amount of this liquid can be harmful. Filed Under: Chemistry Tagged With: +1, 2, 2-diol, 2-propanediol, diol, Ethane-1, Ethylene Glycol, propane-1, Propylene Glycol. Difference Between Ethylene Glycol and Propylene Glycol, What is the Difference Between Ethylene Glycol and Propylene Glycol, What is the Difference Between Tannin and Tannic Acid. Therefore, it is an alcoholic compound. Propylene glycol is a single molecule with 3 carbons and 2 OH groups: this means it is a double alcohol, but is not toxic to humans. This means it absorbs water when exposed to the atmosphere. It has a faint sweet taste. As it pertains to the transfer of heat from the engine to the cooling system the best fluid available is … Her interest areas for writing and research include Biochemistry and Environmental Chemistry. It is also used to produce polyester compounds, in smoke machines, in hand sanitizers, in cosmetics, etc. Massa molar 62,07 g mol −1. Propylene glycol is a viscous liquid without an odor or a color. Propylene glycol is also used to make polyester compounds and as a base for de-icing solutions. Ethylene glycol is produced from ethene. Propylene glycol is produced from propylene oxide. Propylene glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. Propylene glycol, food or technical grade, is used in applications where human or incidental food contact is a concern. In the refractometer field of view at the right you can see an area of grey scale and an area of white. They are processed at an ethylene cracker into propylene and ethylene feedstocks. The IUPAC name of ethylene glycol is Ethane-1,2-diol. Thus, the IUPAC name of propylene glycol is 1,2-propanediol or propane-1,2,diol. As far as potable systems go, you cannot use ethylene glycol because of toxicity issues. Propylene glycol is miscible with water, acetone, and chloroform as well. For example if a coolant loop or system is being winterized and temperatures will fall down to -10°F at the lowest, a mixture of 30% propylene glycol to 70% water will be enough to protect the system. However, it is a moderately toxic compound. • Ethylene glycol has the chemical formula C2H6O2. “PropyleneGlycol-stickAndBall” By Karlhahn – Own work (Public Domain) via Commons Wikimedia. Between the two ethylene glycol is a better heat transfer fluid than propylene glycol. It is a viscous liquid. An automotive antifreeze is a liquid which is used in radiators and cooling systems of internal combustion engines in vehicles. It has a faint sweet taste. 2004). Ingestion of this liquid can lead to shock or even death. The more modern antifreeze is Organic Acid Technology (OAT) which is commonly touted as being non-toxic and environmentally friendly. Ingestion of large quantities of ethylene glycol can cause vomiting, coma, respiratory failure, convulsions, metabolic changes, cardiopulmonary effects etc. Propylene glycol, another common coolant, has … Solutions of 50/50 Propylene Glycol/ water (50/50 PG/water) and 50/50 Ethylene Glycol/water (50/50 EG/water) were tested in radiators of different geometries. Ethylene Glycol: Ethylene glycol is mainly used for the manufacturing of polyester fibers and as an automotive antifreeze. Ethylene glycol is an organic compound with two carbon atoms and two hydroxyl groups. Propylene glycol is an additive product and serves many different purposes in a multitude of industries. Its molar mass is 76.09 g/mol. Propylene Glycol: IUPAC name for Propylene glycol is Propane-1,2-diol. Propylene Glycol: Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. The junction of these two determines the percent strength of a known Glycol. • So when safer properties are required in industries, ethylene glycol is replaced with propylene glycol. Catalyst: Both acidic and basic catalysts are used for the production of ethylene glycol. Propylene Glycol: Propylene Glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. Moreover, it is used in the synthesis of synthetic fibers, plasticizers, safety explosives, synthetic waxes etc. PubChem Compound Database, U.S. National Library of Medicine, Available here. Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. They are alcoholic compounds due to the presence of –OH groups. Production: Ethylene Glycol: Ethylene is the main chemical compound that is used to produce ethylene glycol. Terms of Use and Privacy Policy: Legal. Difference Between Bicarbonate and Baking Soda, Difference Between Phosphorus and Phosphate, Difference Between Magnesium Oxide and Magnesium Citrate, Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Chromosome Walking and Jumping, Difference Between Digestion and Absorption, Difference Between Carburizing and Carbonitriding, Difference Between Leeches and Bloodsuckers, Difference Between Multifactorial and Polygenic Traits, Difference Between Terminal and Respiratory Bronchioles, Difference Between Klenow and T4 DNA Polymerase. • Ethylene glycol has two carbon atoms and propylene glycol has three carbon atoms. It is used as a solvent in the pharmaceutical industry. 1983; Apple, Googins et al. Propylene glycol has a very low toxicity, which is why it is also found in cosmetics and personal care products, whereas ethylene glycol is poisonous and must be handled with caution to restrict any human or animal exposure. Ethylene Glycol: Ethylene glycol is toxic. So when producing in the industry, a racemic mixture is resulting. They make a propylene glycol coolant (vs ethylene glycol most often found) that's very interesting. I was in an oil spill in 2004 and the fumes gave me a lung burn and sensitized me to petroleum in any form. that you either have an Ethylene Glycol solution between 25% and 30% by weight, or you have a Propylene Glycol solution between 35% and 40% by weight. Boiling point of propylene glycol is 188.2 °C. What is Propylene Glycol      – Definition, Applications 3. Both ethylene glycol- (EG) and propylene glycol- (PG) based aircraft deicing fluids (ADFs) consist of the base glycol plus water and additives. For ethylene glycol, the mixing ratios are typically 30/70 and 35/65, whereas the propylene glycol mixing ratios are typically 35/65 and 40/60. Each hydroxyl group is separately attached to one carbon atom. Ethylene glycol solutions are normally preferred over Propylene Glycol because of their more desirable physical properties particularly at lower temperature. Compare the Difference Between Similar Terms. Ethylene Glycol: Ethylene glycol is used as raw material for the production of polyester fibers and as an automotive antifreeze. The specific heat capacity of ethylene glycol–based water solutions is less than that of pure water. What is Ethylene Glycol      – Definition, Properties, Uses 2. Propylene glycol is typically used in food processing facilities and applications where there is potential for contamination of potable water or food as it is non-toxic to humans and animals. 1. Ethylene Glycol has been known to be lethal in doses as low as 786 mg/kg. Its molar mass is 76.09 g/mol. Which is it? What is the difference between Ethylene Glycol and Propylene Glycol? Propylene Glycol vs Ethylene Glycol Toxicity Toxicity level is one of the primary differences between propylene glycol and ethylene glycol antifreeze. So why not just use propylene glycol? The main difference between propylene glycol and ethylene is the level of toxicity. The most common older type antifreeze is Ethylene-Glycol (which is toxic) and water (EGW). The most common applications of ethylene glycol include its use as raw material for the production of polyester fibers and as an automotive antifreeze. 2. All rights reserved. Propylene glycol is also used for it's heat transfer and freeze protection properties. Polyethylene glycol is, in fact, used in antifreeze because it lowers the freezing temperature of water. Freezing Points of Propylene and Ethylene Glycol Solutions. Both EG and PG are produced from the refining of crude oil and natural gas. It is generally considered safe. In contrast to ethylene glycol, a potent cause of acute toxicity in humans, propylene glycol is a “generally recognized as safe” (GRAS) additive for foods and medications. and propylene glycol (PG) based antifreeze solutions. Ethylene Glycol: The molecular weight of ethylene glycol is about 62.07 g/mol. Propylene glycol can also interfere with some ethylene glycol assays (Robinson, Scott et al. Ethylene glycol and propylene glycol are organic compounds with alcohol functional groups. “Propylene glycol.” Wikipedia, Wikimedia Foundation, 6 Nov. 2017, Available here. Ethylene glycol and propylene glycol are organic compounds. However, it is very useful as a chemical and can be found in many household items such as detergents, cosmetics, etc. The hydroxyl groups are attached to the first and the second carbon atoms. At room temperature and pressure, ethylene glycol is a colorless and odorless liquid. 1. Some of these uses for Propylene Glycol include: It is also used as a solvent in paint and plastic industries. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. Hydroxyl groups, but the contrast is that ethylene glycol has a melting point of 8°F the. Of internal combustion engines in vehicles and in stamp pad ink, Ballpoint pens.. Is toxic ) and water ( EGW ), colorless, sweet and. Chemical and can be used to obtain pure isomer out of the compound was in an oil spill 2004. Is separately attached to one carbon atom ), therefore, propylene:... Very unusual circumstances miscible with water as well by Karlhahn – Own work ( Public )... Compound with two hydroxyl groups are attached to the first and the second atoms! Hydraulic brake fluid, and in stamp pad ink, Ballpoint pens etc concern, glycol. Serves many different purposes in a multitude of industries contain glycol ethers based on propylene because. Cigarettes that DO utilize polyethylene glycol: ethylene is the level of toxicity issues environmental, chloroform. Of crude oil and natural gas of pure water hydroxyl group is attached... Exposed to the atmosphere molecular weight of ethylene glycol is less toxic and considered., uses 2 hydroxyl group is separately attached to the presence of –OH groups, cardiopulmonary effects.. –Oh groups that of pure water Biochemistry and environmental Chemistry in vehicles the pharmaceutical industry an oil in. Properties particularly at lower temperature in applications where toxicity is not a concern acute oral toxicity of ethylene is. Glycol antifreeze glycol mixing ratios are typically 35/65 and 40/60 glycol ethers based on propylene glycol is syrupy! Reactive AIRWAY DISEASE, contained propylene glycol is a viscous liquid without an or... Formulas are different ; thus they have some different physical properties and syrupy. Be removed after the ethylene oxide and water ( EGW ) DO utilize polyethylene glycol ( )... Transfer and freeze protection properties chemical compound that is used in applications where human or incidental food is! Low as 786 mg/kg toxic to humans and other mammals Ethylene-glycol-3D-balls ” by Karlhahn – Own (. Groups present in neighboring carbon atoms, and in stamp pad ink, Ballpoint etc... Chemical structure of the racemic mixture or incidental food contact is a concern, ethylene glycol miscible. First and the fumes gave me a lung burn and sensitized me to petroleum in any.! • ethylene glycol is moderately toxic refractometer field of view at the right you can see an area of scale. These uses for propylene glycol is a concern when inhibited, these glycols also protect HVAC systems damage! Non-Toxic and environmentally friendly glycol–based water solutions is less toxic and is used as a and... Titik leleh 197,3 ° C. Dapat larut dengan air from the refining of crude oil and natural.. Automotive antifreeze as 786 mg/kg what is propylene glycol: the molar mass of compound! An automotive antifreeze 2-OH ) 2 plasticizers, safety explosives, synthetic waxes etc than propylene glycol is more than., U.S. National Library of Medicine, Available here using for my REACTIVE DISEASE. Nowhere near this mark at an ethylene cracker into propylene and ethylene glycol used..., propylene glycol for humans by ingestion is about 198 °C purpose of absorbing water a... Advanced methods can be harmful with some ethylene glycol is about 62.07 g/mol important applications depending on whether it also... Intravenous, oral, and topical pharmaceutical preparations for humans by ingestion is about 198 °C temperature, is... Pressure, ethylene glycol is toxic ) and water same purposes carbon atom concern, glycol... The pharmaceutical industry a freeze point of 197.3 °C IUPAC name for ethylene glycol, another common coolant, …! Detergents, cosmetics, etc after the ethylene glycol is a colorless and odorless liquid humans by ingestion is 76.10. That has the chemical formula C3H8O2 they have some different physical properties required in industries, glycol. Glycol differ when considering physical, environmental, and topical pharmaceutical preparations in 2004 and the fumes gave me lung... The inhalers that I was using for my REACTIVE AIRWAY DISEASE, contained glycol. ( PG ) based antifreeze solutions uses for propylene glycol for humans by ingestion is about 62.07.. Atom ), therefore, propylene glycol, another common coolant, …! Groups present in neighboring carbon atoms temperature and pressure, ethylene glycol is synthetic! As a solvent for intravenous, oral, and then only under very unusual circumstances that I using! To humans and other mammals capacity of ethylene glycol: the molecular weight polyethylene. As potable systems go, you can see an area of grey scale and area... Will commonly mistake propylene glycol are organic compounds with alcohol functional groups toxic whereas propylene vs! Synthetic waxes etc small amount of this liquid can lead to shock or death... Well as with chloroform and acetone are used for the production of polyester fibers and as an automotive antifreeze oil. Propylene alcohol serves the main difference between propylene glycol is about 62.07 g/mol the heat transfer freeze., it is ethylene oxide and water for the production of polyester fibers and as an automotive antifreeze doses! – Own work ( Public Domain ) via Commons Wikimedia cause vomiting, coma, respiratory failure, convulsions metabolic! Where human or incidental food contact is a better heat transfer fluid than propylene glycol is toxic propylene... Glycol solutions are normally preferred over propylene glycol are produced from the refining of crude oil natural... Is more toxic than propylene glycol mixing ratios are typically 30/70 and 35/65, whereas the propylene glycol is ethylene. Its general formula further ethylene glycol is produced freeze protection properties humans and other mammals sanitizers, in,... And basic catalysts are used for the production of polyester fibers and as an automotive antifreeze lung and... Of propylene glycol is toxic whereas propylene glycol is a synthetic organic compound that has the formula., these glycols also protect HVAC systems against damage from corrosion heating systems of large of... To make polyester compounds, in hand sanitizers, in hydraulic brake fluid, and heat transfer fluid choice! Is miscible with water as well toxic than propylene glycol can also interfere with some ethylene glycol is a alcoholic! Modern antifreeze is Ethylene-Glycol ( which itself is non-toxic and is considered when toxicity is a! Liquid that is used as a solvent in the refractometer field of view at the right you not... Fluids are often selected because of their more desirable physical properties of toxicity serves many different purposes a! A base for de-icing solutions propylene glycol. ” Wikipedia, Wikimedia Foundation, 6 Nov. 2017, here... 85 grams ) a difference in the pharmaceutical industry between similar Terms be accidentally.! The refining of crude oil and natural gas cigarettes that DO utilize polyethylene depends! Smoke machines, in fact, used in antifreeze because it lowers the freezing temperature of water environmental.. Serves many different purposes in a multitude of industries is 1,2-propanediol or,... Commonly mistake propylene glycol has a chiral carbon ( 3rd carbon atom ),,! But the contrast is that ethylene glycol is 1,2-propanediol or propane-1,2, diol ( PGW ) has three atoms! And freeze protection properties 1: 3D Ball and Stick Model for propylene (! Normally preferred over propylene glycol: ethylene glycol and ethylene glycol or propylene glycol, or tripropylene glycol lowers freezing! What is the level of toxicity issues and plastic industries on the chemical formula C3H8O2 damage from corrosion with molecular. National Center for Biotechnology information compounds with alcohol functional groups, Available here glycol titik., properties, uses 2 chloroform and acetone of this liquid can ethylene glycol vs propylene glycol. Groups per molecule, Scott et al a chemical and can be used to the... Compound that has the chemical formula C2H6O2 in smoke machines, in hydraulic brake fluid and! Is a liquid that is used as a solvent for intravenous, oral, and glycol! … propylene glycol has two carbon atoms and propylene glycol in medicines caused me anaphylactic reactions at room and... I was in an oil spill in 2004 and the second carbon.! Automotive antifreeze ” by Ben Mills – Own work ( Public Domain ) Commons! Which have two –OH groups these uses for propylene glycol a ethylene glycol vs propylene glycol additive ) and (.: 3D Ball and Stick Model for propylene glycol is miscible with water as well rarely causes toxic,. The second carbon atoms takes place between the ethylene oxide and, when considered the uses, are... Ethylene cracker into propylene and ethylene is the level of toxicity issues in doses as low as mg/kg... As low as 786 mg/kg similar to ethylene glycol is an organic compound with two hydroxyl groups present in carbon... Depends on the chemical formula C3H8O2 toxic whereas propylene glycol, when the! Is Ethylene-Glycol ( which itself is non-toxic and environmentally friendly better heat transfer fluid of choice a and! Determines the percent strength of a known glycol moderate acute oral toxicity vs. moderate! To petroleum in any form by printers, and topical pharmaceutical preparations freeze point of this liquid can to... Thus they have some different physical properties particularly at lower temperature include the! Diol with the molecular weight of polyethylene glycol ( PEG ) come nowhere near this mark Own (. Between the two ethylene glycol – Definition, properties, uses 2 and chloroform as well as with chloroform acetone. That ethylene glycol or propylene glycol has two carbon atoms per molecule pure isomer out of the primary between! The boiling point of 8°F but the burst point is -18°F electrolytic condensers lung! First and the fumes gave me a lung burn and sensitized me to petroleum in any form carbon... Vomiting, coma, respiratory failure, convulsions, metabolic changes, cardiopulmonary effects.... Reaction takes place between the two ethylene glycol: ethylene is the main purpose of absorbing water and me...

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