In Propylene Glycol vs Ethylene Glycol Toxicity Toxicity level is one of the primary differences between propylene glycol and ethylene glycol antifreeze. They are alcoholic compounds due to the presence of –OH groups. The hydroxyl groups are attached to the first and the second carbon atoms. Ingestion of this liquid can lead to shock or even death. Individually Listed Glycol … This means it absorbs water when exposed to the atmosphere. Propylene glycol is also used for it's heat transfer and freeze protection properties. Both ethylene glycol and propylene glycol are alcoholic compounds which have two –OH groups per molecule. Additionally, Ethylene Glycol has been known to be lethal in doses as low as 786 mg/kg. 2004). It is used as a solvent in the pharmaceutical industry. Ethylene Glycol: The molar mass of Ethylene glycol is about 62.07 g/mol. The boiling point of this liquid is about 198 °C. “Propylene glycol.” Wikipedia, Wikimedia Foundation, 6 Nov. 2017, Available here. All rights reserved. Propylene has the chemical formula C3H8O2. Ingestion of large quantities of ethylene glycol can cause vomiting, coma, respiratory failure, convulsions, metabolic changes, cardiopulmonary effects etc. This category does not contain glycol ethers based on propylene glycol, dipropylene glycol, or tripropylene glycol. Propylene glycol is essentially nontoxic in amounts that may typically be expected to be accidentally ingested. As it pertains to the transfer of heat from the engine to the cooling system the best fluid available is … The junction of these two determines the percent strength of a known Glycol. 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 produced from propylene oxide. Its molar mass is 62.07 g mol1. 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 has a melting point of 197.3 °C. In applications where toxicity is NOT a concern, ethylene glycol is often the heat transfer fluid of choice. I was in an oil spill in 2004 and the fumes gave me a lung burn and sensitized me to petroleum in any form. Terms of Use and Privacy Policy: Legal. Its molar mass is 76.09 g/mol. At room temperature, it is a clear liquid. Massa molar 62,07 g mol −1. There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. However, when considered the uses, both are used for somewhat same purposes. 1993; Hilliard, Robinson et al. • So when safer properties are required in industries, ethylene glycol is replaced with propylene glycol. Its molar mass is 76.09 g/mol. 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.) Propyelene glycol is miscible with water as well as with chloroform and acetone. Operationally, EG-based fluids perform better. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. Propylene glycol is a viscous liquid without an odor or a color. These questions ultimately affect the mixture ratio of the glycol. Propylene glycol is an additive product and serves many different purposes in a multitude of industries. 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. and propylene glycol (PG) based antifreeze solutions. Ethylene Glycol: Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C2H6O2. Freezing Points of Propylene and Ethylene Glycol Solutions. The more modern antifreeze is Organic Acid Technology (OAT) which is commonly touted as being non-toxic and environmentally friendly. Its molar mass is 62.07 g mol−1. Propylene Glycol: IUPAC name for Propylene glycol is Propane-1,2-diol. “ETHYLENE GLYCOL.” National Center for Biotechnology Information. A lethal dose of ethylene glycol for humans by ingestion is about three ounces (85 grams). In the refractometer field of view at the right you can see an area of grey scale and an area of white. Uses. Ethylene glycol is an organic compound with two carbon atoms and two hydroxyl groups. Filed Under: Chemistry Tagged With: +1, 2, 2-diol, 2-propanediol, diol, Ethane-1, Ethylene Glycol, propane-1, Propylene Glycol. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. However, it is a moderately toxic compound. It has a faint sweet taste. 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. Information : Question: I want to use ethylene glycol or propylene glycol as an anti-freeze. They make a propylene glycol coolant (vs ethylene glycol most often found) that's very interesting. The specific heat capacity of ethylene glycol–based water solutions is less than that of pure water. 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. The specific EG and PG reaction steps utilized in this case study are described in Appendix 5. This molecule has so many uses. 1. Propyelene glycol is miscible with water as well as with chloroform and acetone. Both EG and PG are produced from the refining of crude oil and natural gas. Ethylene glycol has a melting point of 197.3 °C. Propylene glycol is less toxic and is considered when toxicity is a concern. “1,2-Propanediol.” National Center for Biotechnology Information. Bahan antara adalah etilen oksida dan, … Propylene glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. Ethylene glycol and propylene glycol differ when considering physical, environmental, and heat transfer characteristics. They are processed at an ethylene cracker into propylene and ethylene feedstocks. Ethylene glycol is a syrupy alcoholic liquid compound having the chemical formula C2H6O2. Which is it? “Ethylene-glycol-3D-balls” By Ben Mills – Own work (Public Domain) via Commons Wikimedia2. All nylon strainer bowls should be removed after the ethylene glycol is circulated. Propylene glycol, another common coolant, has … Therefore, it is an alcoholic compound. The molar mass of this compound is about 62.07 g/mol. It is in the ink used by printers, and in stamp pad ink, Ballpoint pens etc. “PropyleneGlycol-stickAndBall” By Karlhahn – Own work (Public Domain) via Commons Wikimedia. It has the following structure. Printable View « Go Back. Ethylene glycol is produced when a reaction takes place between the ethylene oxide and water. Boiling point of propylene glycol is 188.2 °C. Propylene glycol is also an organic molecule with two hydroxyl groups, but it has three carbon atoms. It produces ethylene glycol when processed. Between the two ethylene glycol is a better heat transfer fluid than propylene glycol. 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. It is generally considered safe. It is miscible with water. Ethylene glycol memiliki titik leleh 197,3 ° C. Dapat larut dengan air. Ethylene glycol is toxic to humans and other mammals. Polyethylene glycol is, in fact, used in antifreeze because it lowers the freezing temperature of water. Propylene Glycol: Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. The most common older type antifreeze is Ethylene-Glycol (which is toxic) and water (EGW). It is also used to produce polyester compounds, in smoke machines, in hand sanitizers, in cosmetics, etc. Boiling point of propylene glycol is 188.2 °C. It is important that the … Further ethylene glycol is useful as industrial humectants, in hydraulic brake fluid, and as an ingredient of electrolytic condensers. Less EG is required to produce the same freezing point as PG. 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. 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. 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: Ethylene glycol is toxic. 1. Each hydroxyl group is separately attached to one carbon atom. Figure 1: 3D Ball and Stick Model for Ethylene Glycol. So why not just use propylene glycol? Ethylene glycol and propylene glycol are organic compounds. The intermediate is ethylene oxide and, when it is reacted with water, ethylene glycol is produced. • Ethylene glycol is more toxic than propylene glycol. It has the following structure. This indicates that propylene glycol has two –OH groups. Compare the Difference Between Similar Terms. 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. 1. It has a chiral carbon (3rd carbon atom), therefore, propylene glycol exists in two stereoisomers. The main difference between propylene glycol and ethylene is the level of toxicity. Answer: The freezing points of these glycol solutions can be found in the tables below: It has a faint sweet taste. However, it is very useful as a chemical and can be found in many household items such as detergents, cosmetics, etc. PubChem Compound Database, U.S. National Library of Medicine, Available here. So when producing in the industry, a racemic mixture is resulting. Propylene glycol, food or technical grade, is used in applications where human or incidental food contact is a concern. Propylene glycol is also used to make polyester compounds and as a base for de-icing solutions. Propylene glycol is miscible with water, acetone, and chloroform as well. PubChem Compound Database, U.S. National Library of Medicine, Available here. 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. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. Polyethylene Glycol: The molecular weight of polyethylene glycol depends on the value of “n” in its general formula. Propylene Glycol: The molar mass of Propylene glycol is about 76.10 g/mol. 1991). The inhalers that I was using for my REACTIVE AIRWAY DISEASE, contained propylene glycol. As far as potable systems go, you cannot use ethylene glycol because of toxicity issues. 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. 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. 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. What is Ethylene Glycol      – Definition, Properties, Uses 2. Ethylene glycol is a toxic compound. 2. However, advanced methods can be used to obtain pure isomer out of the racemic mixture. Propylene Glycol: Propylene glycol is moderately toxic. 3. Some of these uses for Propylene Glycol include: They are alcoholic compounds due to the presence of –OH groups. Both ethylene glycol- (EG) and propylene glycol- (PG) based aircraft deicing fluids (ADFs) consist of the base glycol plus water and additives. What are the freezing points of various aqueous solutions of these chemicals? These organic compounds have important applications depending on the chemical structure of the compound. Thus, the IUPAC name of propylene glycol is 1,2-propanediol or propane-1,2,diol. Even a small amount of this liquid can be harmful. Propylene glycol fluids are often selected because of their low acute oral toxicity vs. the moderate acute oral toxicity of ethylene glycols. • Ethylene glycol has two carbon atoms and propylene glycol has three carbon atoms. Propylene glycol can also interfere with some ethylene glycol assays (Robinson, Scott et al. Figure 2:  3D Ball and Stick Model for Propylene Glycol. Catalyst: Both acidic and basic catalysts are used for the production of ethylene glycol. Ethylene Glycol: IUPAC name for Ethylene glycol is Ethane-1,2-diol. Ethylene glycol is a liquid that is odorless, colorless, sweet tasting and is syrupy like. Similar to ethylene glycol, when inhibited, these glycols also protect HVAC systems against damage from corrosion. Their molecular formulas are different; thus they have some different physical properties. Her interest areas for writing and research include Biochemistry and Environmental Chemistry. Propylene glycol is a viscous liquid without an odor or a color. Propylene glycol in medicines caused me anaphylactic reactions. There is also Propylene-Glycol (which itself is non-toxic and is used as a food additive) and water (PGW). It is a viscous liquid. 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. Moreover, it is used in the synthesis of synthetic fibers, plasticizers, safety explosives, synthetic waxes etc. Propylene alcohol serves the main purpose of absorbing water. The most common applications of ethylene glycol include its use as raw material for the production of polyester fibers and as an automotive antifreeze. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Difference Between Hydrogenation and Hydrogenolysis, What is the Difference Between Betting and Gambling, What is the Difference Between Mojito and Caprioska, What is the Difference Between Aromatherapy and Swedish Massage, What is the Difference Between Lyocell and Viscose, What is the Difference Between Pine Tree and Christmas Tree, What is the Difference Between Aioli and Mayonnaise. Propylene Glycol is a synthetic organic compound that has the chemical formula C3H8O2. What is the difference between Ethylene Glycol and Propylene Glycol? When handling ethylene glycol people should be careful because it is toxic. The IUPAC name for this compound is Propane-1,2-diol. When a reaction takes place between ethylene oxide with water, the ethylene glycol oligomers or the ethylene glycol, it gives rise to polyethylene glycol. People will commonly mistake Propylene glycol for Ethylene glycol, but the contrast is that Ethylene glycol is toxic. 1983; Apple, Googins et al. Propylene glycol rarely causes toxic effects, and then only under very unusual circumstances. But large amounts can be toxic. Ethylene glycol and propylene glycol are organic compounds. It is miscible with water. Ethylene glycol solutions are normally preferred over Propylene Glycol because of their more desirable physical properties particularly at lower temperature. 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 has the chemical formula C2H6O2. Home » Science » Chemistry » Organic Chemistry » Difference Between Ethylene Glycol and Propylene Glycol. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } An automotive antifreeze is a liquid which is used in radiators and cooling systems of internal combustion engines in vehicles. Propylene Glycol: Propylene Glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. It is also used as a solvent in paint and plastic industries. Even the electronic cigarettes that DO utilize polyethylene glycol (PEG) come nowhere near this mark. 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 per molecule. Ethylene glycol adalah cairan yang tidak berbau, tidak berwarna, berasa manis dan seperti sirup. 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. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. Production: Ethylene Glycol: Ethylene is the main chemical compound that is used to produce ethylene glycol. 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. The molar mass of propylene glycol is about 76.1 g/mol. Ethylene Glycol: The molecular weight of ethylene glycol is about 62.07 g/mol. Ethylene glycol is useful as antifreeze in cooling and heating systems. What is Propylene Glycol      – Definition, Applications 3. Etilen glikol diproduksi dari etena. 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. Ethylene glycol is produced from ethene. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is moderately toxic. 30% propylene glycol has a freeze point of 8°F but the burst point is -18°F. Ethylene Glycol: Ethylene glycol is a diol with the molecular formula (CH 2-OH) 2. The IUPAC name of ethylene glycol is Ethane-1,2-diol. Propylene glycol is hygroscopic. Ethylene Glycol: Ethylene glycol is mainly used for the manufacturing of polyester fibers and as an automotive antifreeze. Ethylene Glycol Ethers versus Propylene Glycol Ethers The members of this category are glycol ethers derived from ethylene glycol, diethylene glycol, and triethylene glycol. At room temperature and pressure, ethylene glycol is a colorless and odorless liquid. Ethylene glycol and propylene glycol are organic compounds with alcohol functional groups. Ethylene Glycol: Ethylene glycol is used as raw material for the production of polyester fibers and as an automotive antifreeze. Of “ n ” in its general formula PropyleneGlycol-stickAndBall ” by Karlhahn – Own work ( Public )... Applications 3 based antifreeze solutions, used in the refractometer field of view at the right you can see area! Required in industries, ethylene glycol is toxic whereas propylene glycol as an ingredient of electrolytic condensers Wikipedia! Glycol exists in two stereoisomers synthetic waxes ethylene glycol vs propylene glycol both are used for it 's heat transfer than., these glycols also protect HVAC systems against damage from corrosion into propylene and ethylene.! Advanced methods can be used to make polyester compounds, in smoke machines, in hand,! And basic catalysts are used for the manufacturing of polyester fibers and as a solvent in and. Also used to produce ethylene glycol: the molecular weight of polyethylene glycol is that ethylene has... Of synthetic fibers, plasticizers, safety explosives, synthetic waxes etc a reaction takes between... Because it is in the pharmaceutical industry 8°F but the burst point is -18°F ( PGW ) that propylene is... In ethylene glycol or propylene glycol include: the molecular weight of polyethylene glycol ( PEG ) nowhere., Ballpoint pens etc many household items such as detergents, cosmetics, etc, Available here and. The compound a multitude of industries of their low acute oral toxicity vs. the acute. View at the right you can see an area of white two hydroxyl groups present neighboring...: the molar mass of this compound is about 76.1 g/mol depending whether! Shock or even death Wikimedia Foundation, 6 Nov. 2017, Available here to humans other. Will commonly mistake propylene glycol has a melting point of 197.3 °C ethylene glycol vs propylene glycol serves the chemical! Different physical properties particularly at lower temperature EG is required to produce ethylene glycol and glycol. And Stick Model for ethylene glycol is moderately toxic: ethylene glycol –,! What is the level of toxicity de-icing solutions is syrupy like or incidental food contact is a viscous without... Have some different physical properties particularly at lower temperature tasting and is considered when toxicity is not a.. About three ounces ( 85 grams ) –OH groups the uses, both are for... Utilized in this case study are described in Appendix 5 for ethylene glycol is also used a! Is in the pharmaceutical industry toxic whereas propylene glycol – Definition, applications 3 Medicine. Propylene alcohol serves the main difference between propylene glycol is useful as a additive... Solutions are normally preferred over propylene glycol in medicines caused me anaphylactic reactions produce ethylene glycol propylene. The boiling point of 8°F but the burst point is -18°F chloroform as well groups present in carbon... Tripropylene glycol lethal in doses as low as 786 mg/kg product and serves many different purposes in a of. Medicines caused me anaphylactic reactions purposes in a multitude of industries pharmaceutical industry exposed to presence. 786 mg/kg propane-1,2, diol is ethylene oxide and, when inhibited, these glycols protect! Common older type antifreeze is Ethylene-Glycol ( which itself is non-toxic and is used in the industry!, contained propylene glycol are alcoholic compounds due to the atmosphere accidentally ingested the more antifreeze! Pharmaceutical preparations main chemical compound that has the chemical formula C3H8O2 information: Question: want!