Their molecular formulas are different; thus they have some different physical properties. People will commonly mistake Propylene glycol for Ethylene glycol, but the contrast is that Ethylene glycol is toxic. Ethylene glycol is produced when a reaction takes place between the ethylene oxide and water. I was in an oil spill in 2004 and the fumes gave me a lung burn and sensitized me to petroleum in any form. • 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. Printable View « Go Back. The most common applications of ethylene glycol include its use as raw material for the production of polyester fibers and as an automotive antifreeze. The molar mass of this compound is about 62.07 g/mol. 1. “PropyleneGlycol-stickAndBall” By Karlhahn – Own work (Public Domain) via Commons Wikimedia. Propylene glycol rarely causes toxic effects, and then only under very unusual circumstances. Ethylene glycol and propylene glycol are organic compounds with alcohol functional groups. • Ethylene glycol has the chemical formula C2H6O2. Polythene Glycol: The molecular formula of PEG is (C 2 H 4 O) n+1 H 2 O and its structural formula is expressed as below. It is miscible with water. The more modern antifreeze is Organic Acid Technology (OAT) which is commonly touted as being non-toxic and environmentally friendly. Which is it? It is also used to produce polyester compounds, in smoke machines, in hand sanitizers, in cosmetics, etc. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. What is Ethylene Glycol      – Definition, Properties, Uses 2. Its molar mass is 76.09 g/mol. Ethylene Glycol: Ethylene glycol is mainly used for the manufacturing of polyester fibers and as an automotive antifreeze. Ethylene Glycol: Ethylene glycol is toxic. So why not just use propylene glycol? The most common older type antifreeze is Ethylene-Glycol (which is toxic) and water (EGW). Boiling point of propylene glycol is 188.2 °C. Ethylene Glycol: IUPAC name for Ethylene glycol is Ethane-1,2-diol. 1991). Terms of Use and Privacy Policy: Legal. PubChem Compound Database, U.S. National Library of Medicine, Available here. What are the freezing points of various aqueous solutions of these chemicals? Propylene glycol is also used to make polyester compounds and as a base for de-icing solutions. The specific heat capacity of ethylene glycol–based water solutions is less than that of pure water. The intermediate is ethylene oxide and, when it is reacted with water, ethylene glycol is produced. 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. Ethylene Glycol Ethers versus Propylene Glycol Ethers The members of this category are glycol ethers derived from ethylene glycol, diethylene glycol, and triethylene glycol. Uses. 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. There is also Propylene-Glycol (which itself is non-toxic and is used as a food additive) and water (PGW). Propylene Glycol: The molar mass of Propylene glycol is about 76.10 g/mol. 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. Both ethylene glycol- (EG) and propylene glycol- (PG) based aircraft deicing fluids (ADFs) consist of the base glycol plus water and additives. The main difference between propylene glycol and ethylene is the level of toxicity. Ethylene glycol has a melting point of 197.3 °C. The IUPAC name for this compound is Propane-1,2-diol. Operationally, EG-based fluids perform better. Similar to ethylene glycol, when inhibited, these glycols also protect HVAC systems against damage from corrosion. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. Ethylene glycol and propylene glycol differ when considering physical, environmental, and heat transfer characteristics. Ethylene glycol solutions are normally preferred over Propylene Glycol because of their more desirable physical properties particularly at lower temperature. It has the following structure. 1. Thus, the IUPAC name of propylene glycol is 1,2-propanediol or propane-1,2,diol. All rights reserved. In Its molar mass is 62.07 g mol−1. “Propylene glycol.” Wikipedia, Wikimedia Foundation, 6 Nov. 2017, Available here. Propylene glycol can also interfere with some ethylene glycol assays (Robinson, Scott et al. Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } 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. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. These organic compounds have important applications depending on the chemical structure of the compound. Each hydroxyl group is separately attached to one carbon atom. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. 3. Even the electronic cigarettes that DO utilize polyethylene glycol (PEG) come nowhere near this mark. Propylene alcohol serves the main purpose of absorbing water. 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. 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.) Propylene glycol fluids are often selected because of their low acute oral toxicity vs. the moderate acute oral toxicity of ethylene glycols. “ETHYLENE GLYCOL.” National Center for Biotechnology Information. Massa molar 62,07 g mol −1. Ethylene glycol has two carbon atoms, and propylene glycol has three carbon atoms per molecule. Propylene has the chemical formula C3H8O2. It has a chiral carbon (3rd carbon atom), therefore, propylene glycol exists in two stereoisomers. It has a faint sweet taste. Compare the Difference Between Similar Terms. Ethylene glycol is produced from ethene. “Ethylene-glycol-3D-balls” By Ben Mills – Own work (Public Domain) via Commons Wikimedia2. In applications where toxicity is NOT a concern, ethylene glycol is often the heat transfer fluid of choice. PubChem Compound Database, U.S. National Library of Medicine, Available here. The hydroxyl groups are attached to the first and the second carbon atoms. As it pertains to the transfer of heat from the engine to the cooling system the best fluid available is … Ethylene glycol memiliki titik leleh 197,3 ° C. Dapat larut dengan air. Ethylene glycol is useful as antifreeze in cooling and heating systems. So when producing in the industry, a racemic mixture is resulting. Both EG and PG are produced from the refining of crude oil and natural gas. Etilen glikol diproduksi dari etena. and propylene glycol (PG) based antifreeze solutions. Since there is a chiral carbon (asymmetric carbon) in propylene glycol molecule, the synthesized product is always a racemic mixture of two enantiomers. Ethylene glycol and propylene glycol are organic compounds. Some of these uses for Propylene Glycol include: Propyelene glycol is miscible with water as well as with chloroform and acetone. Propylene Glycol: Propylene Glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. However, when considered the uses, both are used for somewhat same purposes. What is Propylene Glycol      – Definition, Applications 3. Propyelene glycol is miscible with water as well as with chloroform and acetone. However, advanced methods can be used to obtain pure isomer out of the racemic mixture. Therefore, it is an alcoholic compound. 1993; Hilliard, Robinson et al. It produces ethylene glycol when processed. Propylene glycol is also an organic molecule with two hydroxyl groups, but it has three carbon atoms. Rather than put safe propylene glycol in the tank, perhaps a better option is to drain the tank, and empty low spots in the plumbing-although that is not always possible. 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. The molar mass of propylene glycol is about 76.1 g/mol. They are alcoholic compounds due to the presence of –OH groups. 1. Propylene glycol is produced from propylene oxide. Ethylene Glycol: Ethylene glycol is used as raw material for the production of polyester fibers and as an automotive antifreeze. Ethylene glycol has a melting point of 197.3 °C. Boiling point of propylene glycol is 188.2 °C. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. 30% propylene glycol has a freeze point of 8°F but the burst point is -18°F. Individually Listed Glycol … This category does not contain glycol ethers based on propylene glycol, dipropylene glycol, or tripropylene glycol. The IUPAC name of ethylene glycol is Ethane-1,2-diol. These questions ultimately affect the mixture ratio of the 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. However, it is very useful as a chemical and can be found in many household items such as detergents, cosmetics, etc. They are processed at an ethylene cracker into propylene and ethylene feedstocks. Propylene Glycol: Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. The specific EG and PG reaction steps utilized in this case study are described in Appendix 5. They make a propylene glycol coolant (vs ethylene glycol most often found) that's very interesting. 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. Propylene glycol is a viscous liquid without an odor or a color. The inhalers that I was using for my REACTIVE AIRWAY DISEASE, contained propylene glycol. At room temperature, it is a clear liquid. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Ethylene Glycol: The molar mass of Ethylene glycol is about 62.07 g/mol. It has a faint sweet taste. Propylene glycol is hygroscopic. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. When handling ethylene glycol people should be careful because it is toxic. Further ethylene glycol is useful as industrial humectants, in hydraulic brake fluid, and as an ingredient of electrolytic condensers. Propylene glycol, food or technical grade, is used in applications where human or incidental food contact is a concern. Ethylene Glycol: Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C2H6O2. Additionally, Figure 1: 3D Ball and Stick Model for Ethylene Glycol. 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