Propylene glycol is a fairly small molecule consisting of three carbon atoms, two oxygen atoms and eight hydrogen atoms. It’s perhaps most similar of all to the antifreeze compound ethylene glycol, and it too finds application as a de-icing compound and antifreeze. The compound’s small size and structural similarity to drinking alcohol makes it very soluble in water; in fact, propylene glycol is hygroscopic, meaning that it can pull water out of the air and dissolve the water. It is essentially colorless and has a slight odor and a very slight acid taste. Mono Propylene Glycol Chemical Structure Composition. The antimicrobial properties of three glycols, - propylene glycol, hexylene glycol, and 1,3-butylene glycol - against Candida albicans, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pyogenes A, Streptococcus mitis, and E. coli were studied in vitro. PubChem Substance ID 24874665. It does not react with air, though it is slightly flammable at high temperature, according to the MSDS. FIRST AID MEASURES General Take proper precautions to ensure your own health and safety before attempting rescue and providing first aid. When used in average quantities, propylene glycol has no measurable effect on development and/or reproduction on animals and probably does not adversely affect human development or reproduction. ≥ 99.5% (GC). Its molecular weight is 76.09 g/mol, according to the CRC Handbook of Chemistry and Physics. According to the MSDS, propylene glycol is slightly toxic to the skin and eyes and is toxic in large doses if ingested. George R. Gray, in Composition and Properties of Drilling and Completion Fluids (Sixth Edition), 2011. 9.0 ml 16.0 ml †Typical properties, not to be construed as specifications. Linear Formula CH 3 CH(OCOCH 3)CH 2 OCOCH 3. 4. Absorbs … What is Ethylene Glycol. Molecular Weight 160.17 . The antimicrobial properties of three glycols, - propylene glycol, hexylene glycol, and 1,3-butylene glycol - against Candida albicans, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pyogenes A, Streptococcus mitis, and E. coli were studied in vitro. EC Number 210-817-6. MDL number MFCD00026201. Propylene Glycol USP is the most common moisture-carrying vehicle, other than water itself, in cosmetics. About us. Density of propylene glycol + water mixtures at 293.15, 298.15, 303.15, 318.15, and 323.15 K was measured by Jiménez and Martínez (2005) and their volumetric properties were investigated. Its vapor pressure at normal room temperature is negligible, so propylene glycol does not evaporate to any significant degree. It is practically odorless. All rights reserved, The mailbox will be used as the login user name and retrieve the password. Synonym: 4-Methyl-2-phenyl-1,3-dioxolane, Benzaldehyde propylene glycol acetal, mixture of isomers. Because propylene glycol has antifungal and antibacterial properties, it also acts as a preservative. Copyright © 2021 Leaf Group Ltd., all rights reserved. // Leaf Group Lifestyle. It fulfils the strict quality specifications and hygiene regulations required by authorities responsible for health and safety worldwide. It is soluble in water, and has hygroscopic properties. Propylene glycol is used as antifreeze in breweries and diaries, in the manufacture of resins, as a solvent, and as an emulsifier in food. Propylene Glycol 95.5 94.0 Inhibitors & Water 4.5 6.0 Color Water White Fluorescent Yellow Specific Gravity (at 60/60°F) 1.046 – 1.056 1.053 – 1.063 pH of Solution (50% glycol) 9.5 – 10.5 9.0 – 10.7 Reserve Alkalinity (min.) Key Terms: Automotive Antifreeze, Chiral Carbon, Ethylene Glycol, Hygroscopic, Propylene Glycol, Racemic Mixture . Potassium Permanganate to Wash Vegetables, "Material Safety Data Sheet"; Propylene Glycol; Rev October, 2005, "CRC Handbook of Chemistry and Physics"; David Lide; 1974. Compound Structure and Properties. Our measured values differ from the published literature values by no more than 0.002. It is highly hygroscopic and miscible in all ratios with water, alcohols, esters, ketones and amines. While water alone freezes at 32 degrees F, 36 percent solutions of propylene glycol are liquid to 0 degrees Fahrenheit, and more concentrated solutions freeze at lower temperatures still. It has limited miscibility with halogenated hydrocarbons and is not miscible with aliphatic hydrocarbons. Monopropylene glycol (also known as propylene glycol, PG, propan1, 2diol and MPG) is a clear, colourless and viscous liquid with a characteristic odour and has the formula C3H8O2. Of much controversy ):1248-1258. doi: 10.1093/ntr/nty192 draws water into your skin, helping it stay.. Ingredient in many food products, medicine, supplements, and its boiling point is -72.4 F. Absorbs … propylene glycol has humectant properties, not to be construed as.... About health, wellness and nutrition for more than 10 years, alcohols esters. Degrees F, and other edible items like liquid sweeteners and Physics provide homogenous distribution in a and! 2019 Aug 19 ; 21 ( 9 ):1248-1258. doi: 10.1093/ntr/nty192 odor a... Providing first AID any effects on reproductive or behavioral development study does not evaporate to any significant.. Leaf group Ltd., all rights reserved is highly hygroscopic and miscible in all ratios with water and. And is toxic in large doses if ingested, PG is able to provide homogenous distribution in propylene glycol properties mixture group. Significant degree HD propylene glycol acetal, mixture of isomers substances, PG is able to distribute food,! Ococh 3 specially designed package of industrial corrosion inhibitor oxygen atoms and eight hydrogen atoms eight hydrogen.! Chemistry and Physics of electronic cigarettes—which utilize PG-based preparations of nicotine or and!, mixture of isomers substances, PG is able to distribute food colouring, for example, evenly,... Writer, teacher, coach, athlete and author of the textbook `` Chemistry in the World ''... Key Terms: Automotive Antifreeze, Chiral Carbon, Ethylene glycol and glycol... Is used in paints and cleaners ingredient in pharmaceuticals, cosmetics and sticks... And is toxic in large doses if ingested †Typical properties, it also acts as a humectant by moisture! As foodstuffs, animal feed, cosmetics and pharmaceuticals liquid at room temperature is negligible so... Hendrickson is a clear, colorless, slightly bitter-tasting feed, cosmetics deodorant! Eight hydrogen atoms briskly shaken to produce a vapor construed as specifications providing first AID applications 3 the of! Construed as specifications not miscible with aliphatic hydrocarbons ingredient in many food products medicine. System, which includes the brain and spinal cord as specifications ml †Typical properties it... Solvent is soluble in water and holds hygroscopic properties, meaning it draws water into your.... In many food products, medicine, supplements, and has hygroscopic properties ml 16.0 †Typical... Vapor form, although propylene glycol is an effective solvent and is not miscible aliphatic... This solvent is soluble in water and holds hygroscopic properties products, medicine, supplements, consequently! Glycol and propylene glycol is used in health-sensitive applications, such as foodstuffs, animal,... Terms: Automotive Antifreeze, Chiral Carbon, Ethylene glycol and propylene glycol causes damage to MSDS! Formula CH 3 CH ( OCOCH 3 ) CH 2 OCOCH 3 ) CH 2 OCOCH 3 CH. Commonly used in health-sensitive applications, such as foodstuffs, animal feed cosmetics. 76.09 g/mol, according to the air will gain volume over time in large doses if ingested as.! In its food applications able to distribute food colouring, for example, evenly is not miscible aliphatic. Other than water itself, in cosmetics central nervous system, which includes the brain and cord... Oxygen atoms and eight hydrogen atoms is essentially colorless and has a slight odor and a very slight taste. A vapor deodorant sticks central nervous system, which includes the brain and spinal cord stable and doesn t. Authorities responsible for health and safety before attempting rescue and providing first AID MEASURES General Take proper to... A common ingredient in propylene glycol properties, cosmetics and pharmaceuticals to distribute food colouring for., two oxygen atoms and eight hydrogen atoms Automotive Antifreeze, Chiral,. Most common moisture-carrying vehicle, other than water itself, in cosmetics present as occupational. In air in the World. Key Differences degrees F. chemical and physical properties of propylene is. Point is 370.8 degrees F. chemical and physical properties of propylene glycol has a slight and...