This lesson goes over this substances properties, names, structures, and formula. Propylene glycol c3h8o2 cid 1030 structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety. Propylene glycol is an odorless and colorless liquid. With pure meg monoethylene glycol that hot spot has to get to 200 c 392 f. Propylene glycol is an organic compound with many industrial uses. In food processing systems the common heattransfer fluid is based on propylene glycol. In the form of technical quality, it is an important material for polyurethane plastics and polyester resins.
Chemical and physical properties of polypropylene incca. Effects of propylene glycol on the physical properties of polyvinyl alcohol solutions and films macromol. It is a viscous, colorless liquid, which is nearly odorless but possesses. Information regarding the chemical identity of propylene glycol is located in table 31. Download as pdf file download as excel file download as 2d mole file predict. This assessment summarizes available information on the use, physical chemical properties, toxicological effects, exposure profile, environmental fate, and ecotoxicity of dpgme. Certain bacterial strains convert propylene glycol to pyruvic acid in the presence of thiamine 15. Physical properties of ethylene glycolbased deep eutectic. Ethylene glycol is acutely toxic to humans, whereas propylene glycol is a safe additive for foods and medications. However, in applications where toxicity is a concern, propylene glycol fluids are used. Where can i buy chemcool inhibited propylene glycol. It is a solvent for fats, oils, waxes, resins, flavoring. Taken internally, propylene glycol is harmless, probably because its oxidation yields pyruvic and acetic acids. Chemical product and company identification product name.
Large amount of propylene glycol is used in the plastics industry for the manufacture of polyester fibers and alkyd resins. Thermophysical properties of aqueous solutions used diva. Inert reassessment dipropylene glycol monomethyl ether. Appearance colourless odourless hygroscopic viscous liquid. The studied dess showed physical properties similar to that of ionic liquids. Propylene glycol is completely miscible with water and many organic solvents and will dissolve a number of resins, dyes and essential oils. Dow propylene glycol uspep general description propylene glycol uspep pg uspep, referring to the united states and european pharmacopoeias, is a highpurity grade of monopropylene glycol for use in pharmaceutical, food, cosmetic, personal care, flavor and fragrance, plus a variety of other applications. Information regarding the chemical identity of ethylene glycol is located in table 41.
Physical dangers chemical dangers reacts violently with strong oxidants and alkalis. Volumetric and compressibility behaviour of polypropylene. Propylene glycol mono and diesters of fats and fatty acids. Monopropylene glycol, or simply propylene glycol, is an organic double alcohol with the formula c3h8o2. This abstract is a brief summary of the referenced standard. Aromas and essences in the industry, medicine, and is used in cosmetics. Propylene glycol is a compound which is generally recognized as safe gras by the u. The most common antifreeze fluid ethylene glycol must not be used where there is a chance of leakage to potable water or food processing systems. This information includes synonyms, chemical formula and structure, and identification numbers. Some of the organic aqueous solutions such as propylene glycol do not have a. Propylene glycol technical grade is intended for use as a raw material in the production of saturated and unsaturated polyester resins. It forms a colourless and odourless solution, highly soluble in water and chloroform. Abstract the toxicological profiles of monopropylene glycol mpg, dipropylene glycol dpg. Both chemicals are clear, colorless, odorless, sweettasting, highly viscous liquids.
Information regarding the physical and chemical properties of ethylene glycol is located in table 42. Polyethylene glycol grades with molecular weights of 6000 and above can be used as lubricants, particularly for soluble tablets. Effects of propylene glycol on the physical properties of polyvinyl alcohol solutions and films article in macromolecular research 178. Additional components added to antifreeze products include corrosion inhibitors, antifoaming agents, coloring agents, and metal and glycol antioxidants 66. Pdf density, viscosity, surface tension, and molar volume of. Monopropylene glycol general use reagent chemicals. Flammable andor toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. The lubricant action is not as good as that of magnesium stearate, and stickiness may develop if the material becomes too warm during compression. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. The fda along with other international standards institutions considers it to be generally safe to handle and to ingest and has certified the safety of using propylene glycol in medications, food flavors and for industrial purposes. A closer observation of the curves reveals that partial breakdown of physical. At low concentration it forms an explosive and flammable mixture with air, while at high concentrations it can cause asphyxiation and skin burns. Like other alcohols, propylene glycol is oxidized by liver enzymes. Study of some physicalchemical properties of different molecular mass ppgs.
Experimental density values for the systems investigated were used to calculate the apparent molar volume, v. Because of its physical properties and its low toxicity, propylene glycol is being. Ethylene glycol and propylene glycol are manufactured chemicals that have similar physical properties and uses. Propylene glycol can also be used as a solvent in the manufacture of oral, topical applications and injections for the pharmaceutical industry, because it is insoluble in water. Ethylene glycol is used in many different applications, but its also famous for being a deadly poison. Chemical properties of propene cas 115071 download as pdf file download as excel file download as 2d mole file predict properties. Their chemical structures differ by only one methyl group ethylene glycol, hoch 2 ch 2 oh. Propylene glycol c3h8o2 cid 1030 structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities. Polypropylene glycol ppg samples of different molecular mass were.
Chemical and physical properties of propylene glycol. Attached is the science assessment for dipropylene glycol monomethyl ether dpgme. Propylene glycol causes poisoning only rarely and under unusual circumstances. Specifically, the case study focuses on their use in waterbased coolant systems of internal combustion engines1. Ethylene glycol based deep eutectic solvents dess were prepared from different salts. It is completely miscible with water and many organic liquids. Autoprotolysis constants and acidbase properties of. Box 4980 the woodlands, tx 77387 telephone numbers transportationemergency chemtrec. In the same solvent mixtures the protolysis constants of the phthalic acidhydrogen phthalate system have been evaluated and indicate that the solvent is more acidic than water, but less. This specification covers propylene glycol and dipropylene glycol for use in the preparation of surface coatings. Engineering and operating guide for dowtherm sr1 and. Chemical properties of propylene glycol cas 57556 download as pdf file download as excel file download as 2d mole file predict properties. Propylene glycol monoand diesters of fats and fatty acids. Gotfredsen, jorg rademann, jens buchardt, anthony j.
They react with oxoacids and carboxylic acids to form esters plus water. May also decompose explosively from shock, friction or from a buildup of electrostatic charge that sparks suddenly to ground. Propylene glycol is prepared by hydrolysis of propylene oxide. Meanwhile, 1,3 propylene glycol, named trimethylene glycol, is. A closer observation of the curves reveals that partial breakdown of physical structure takes place up to pg content 20% but whole. Propylene oxide is the principal product of the reaction of propylene glycol over a. Pdf physical and chemical assessment of 1,3 propanediol as a. Pdf this paper presents the experimental data on the kinematic viscosity of water ethanol propylene glycol solutions that are prospective as. Physical and chemical properties oxidizing properties vapor pressure relative density octanolwater partition coefficient viscosity vapor density autoignition temperature. The hydroxyl groups on glycols undergo the usual alcohol chemistry, giving a wide variety of possible derivatives. Polyethylene glycol properties and the applications in. Under ordinary conditions, mild steel is a satisfactory material of construction.
Propylene glycol pg has been used as a carrier in fragrance oils. It is used in the petrochemical industry as a fuel and alkylate and in the chemical industry for the production. The material properties enumerated, and apparent specific gravity shall be tested to meet the requirements prescribed. Despite similarities in physical properties and chemical structure, ethylene glycol and propylene glycol have vastly different toxicities. Information regarding the physical and chemical properties of propylene glycol is located in table 3 2.
Finally, 1,3 propanediol seems to induce quite similar aerodynamic properties compared to propylene glycol and glycerol. Information on basic physical and chemical properties physical state colourless liquid. The autoprotolysis constants of propylene glycol and its mixtures with water, acetone, propan2ol and chloroform have been determined potentiometrically. Oxidizing agents convert them to aldehydes or ketones. It contains an asymmetrical carbon, and it exists in two forms. Effects of propylene glycol on the physical properties of. Propylene glycol is essentially nontoxic, and it can be used as a solvent for drugs and as a moisturizing agent for foods. For many heattransfer applications it is necessary to use a heattransfer fluid with lower freezing point than water. Propylene glycol is a major component of softmoist pet foods and is also used as a. Because of its mutual solvent properties, both aromatic chemicals and essential oils can be dissolved in propylene glycol and then diluted with water. Mono propylene glycol usp this sds is not mandated under reach regulation ec no 19072006 and is provided for information only.
It may also be employed as a mining chemical, cement grinding additive, initiator in the synthesis of polyether polyols and other industrial applications. Identification of the substancemixture and of the companyundertaking 1. Product identifier product name mono propylene glycol usp product number 31055 cas number 57556 ec number 2003380 1. A comparison of pegcrosslinked and peggrafted resins morten grotli, charlotte h. Food and drug administration fda under 21 cfr x184. It is a viscous liquid that is sweet, faint and transparent. Propylene glycol is an ideal solvent to mix chemicals while developing photographic films. Standard specification for propylene glycol and dipropylene. Physical and chemical assessment of 1,3 propanediol as a potential. Propylene glycol toxicity in children pubmed central pmc. Material safety data sheet validation date product and company identification 1. Physical properties of polyethylene glycol pegbased.
Ftir analysis depicted the existence of new functional groups in des structure. It is labeled an organic compound in chemistry due to its carbon attributes. Unlike ethylene glycol, however, propylene glycol is not toxic and is used extensively in foods, cosmetics, and oral hygiene products as a solvent, preservative, and moistureretaining agent. Physical properties units propylene glycol dipropylene glycol tripropylene glycol density gcm 3, 77f25c 1. Propylene glycol is also present in propylene glycol alginate, which is known as e405. Heating may cause a violent combustion or explosion producing toxic fumes nitrogen oxides. This assessment summarizes available information on the use, physicalchemical properties, toxicological effects, exposure profile, environmental fate, and ecotoxicity of dpgme. Tccs ethylene glycol meg is a toxic, colorless, practically odorless, lowvolatility, lowviscosity, hygroscopic liquid. Propylene glycol, also called 1,2propanediol, resembles ethylene glycol in its physical properties.
This chemistry permits ethylene glycol to act as an intermediate in a wide range of. Propylene glycol is a highpurity material, which must be handled with special precautions to avoid contamination. Air oxidation of propylene glycol using an electrolytic crystalline silver catalyst yields pyruvic aldehyde. Thermophysical properties of aqueous solutions used as.
Monopropylene glycol, are widely use in the formulation of the bakery product. Chemical and physical properties of polypropylene several different polymerisation methods can be used to produce pp, but all rely on exposing the propylene monomer to high temperatures and pressures in the presence of an active metal catalyst. The source is also providing more information like the publication year, authors and more. Freezing points of propylene glycol based water solutions. Propylene glycol 1, 2propanediol is an organic compound with multiple uses including. Unlike ethylene glycol, propylene glycol has no taste. Propylene glycol is also used to make polyester materials and in deicing fluids. Although propylene glycol has physical properties much like those of ethylene glycol, its physiological properties are quite different. The most important member of the family is monopropylene glycol, also known as 1,2propylene.
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