Meek, health canada, ottawa, canada published under the joint sponsorship of the united nations environment programme, the. Ethylene glycol based water solutions are common in heattransfer applications where the temperature in the heat transfer fluid can be below 32 o f 0 o c. Ucon50 5100 shows the property of inverse 86 solubility. Epa has not classified ethylene glycol for carcinogenicity. Natural gas processing consists of separating all the various. Physical properties of polyethylene glycol pegbased. Physical properties the glycol ethers are colorless liquids with a slight odor. Polyethylene glycol an overview sciencedirect topics. The chemistry and properties of dows glycols are so wideranging, you. Information regarding the chemical identity of ethylene glycol is located in table 41. Physical properties the chemical formula for ethylene glycol is c 2 h.
It has been shown to decrease nf200 degradation and apoptosis, as well as increasing tissue sparing baptiste et al. Epa has not classified the glycol ethers for carcinogenicity. Ethylene glycol, also called ethane1,2diol, the simplest member of the glycol family of organic compounds. Synthesis, properties, and applications of polyethylene. If teg is needed above these concentrationsthen additional stripping of the water is required using dry, preheated. Department of health and human services, public health service. A comprehensive source for additional physical and chemical properties is reference 25. One must remember that the temperature of the refrigerant will be 10 15 f below your glycol solution temperature. One molecule of water from two molecules of glycol to form a polyglycol. Thermal properties of ethylene glycol aqueous solutions. Regulatory information cas number flash point, 112276. Ifthere is backpressure on the regenerator this reduces to 99. Thermophysical properties of glycols and glymes acs publications.
Download as pdf file download as excel file download as 2d mole file predict. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. Conventional heat transfer fluids such as water, oil and ethylene glycol has a low thermal conductivity. Densities and volumetric properties of ethylene glycol. Information regarding the physical and chemical properties of ethylene glycol is located in table 42.
Ethylene glycol safety data sheet according to federal register vol. Rheological properties of polyethylene glycol solutions and gels. Propylene glycol is an organic compound with many industrial uses. Just remember that it should be handled as though it were a food. Dry glycol flows down the tower from the top, from tray to tray or through packing material. To save the metadata to an external file, click save and name the file. The propylene glycol family of chemical compounds consists of monopropylene glycol pg, dipropylene glycol dpg. Excess volumes ve, viscosity deviation, excess refraction. Colligative properties by definition a colligative property is a solution property a property of mixtures for which it is the amount of solute dissolved in the solvent matters but the kind of solute does not matter. All atsdr toxicological profile pdf files are electronic conversions from paper copy or other electronic ascii text files.
This lesson goes over this substances properties, names, structures, and formula. Firstaid measures eye contact flush eyes with water for 15 minutes. Physical properties units propylene glycol dipropylene glycol tripropylene glycol chemical name 1,2propanediol oxybispropanol 1methyl1,2ethanediylbisoxy bispropanol formula c3h8o2 c6h14o3 c9h20o4 cas number1 57556 25265718 24800440 einecs number 2003380 2467703 2464660 molecular weight 76. Diethylene glycol deg, triethylene glycol teg typical end products.
Polyethylene glycol peg is a hydrophilic polymer that may have neuroprotective properties such as aiding in repairing damaged axons kwon et al. Propylene glycol, industrial grade, is the preferred glycol for manufacturing high. The properties reported above are typical physical properties. What links here related changes upload file special pages permanent. The atsdr toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the hazardous substance described here. In offshore deepwater gas production facilities, where the exposure to lower temperatures in subsea pipelines is common, meg is used for hydrate inhibition. Everything you wanted to know about glycol a brewery. This conversion may have resulted in character translation or format errors. Please note that the layout and pagination of this pdf file are not identical to those of the printed cicad. Propylene glycol is used extensively as a substitute for ethylene. Meanwhile, 1,3 propylene glycol, named trimethylene glycol, is. Because of its high boiling point and affinity for water, ethylene glycol is a.
Rheological properties of polyethylene glycol solutions. Simply rightclick on a pdf and select pdf properties changer edit pdf properties to begin editing. The retention time for propylene glycol is 4 min1,2propanediol 57556. Table 4 lists various physical and chemical properties and constants for the propylene glycols. Kister equation, and the corresponding parameters are derived. Later, hayes and pegg determined temperaturetimetransition curves of ethylene glycolwater solutions. Adding propylene glycol to cosmetics and medicines will help them retain their moisture content. Information on basic physical and chemical properties physical state colourless liquid. Nexantchemsystems, coal to meg, changing the rules of the game pdf. This is the primary limitation in enhancing the performance and compactness of many electronic devices in engineering. Corresponding authors a hkust shenzhen research institute, no. Glycols depress waters freezing point providing protection to temperatures as. Table 5 gives a breakdown by percentage for the principal uses of propylene glycol in the united states.
Propylene glycol usp proper handling page 2 of 3 if good hygienic practices are followed and the recommended materials of construction are used, the handling of propylene glycol usp should be no problem. Human health aspects please note that the layout and pagination of this pdf file are not necessarily identical to the hard copy first draft prepared by r. Safety data sheet page 1 of 6 may 11, 2017 section 1. Puremeg monoethylene glycol reclamation and regeneration unit. Other pertinent literature is also presented, but is described in less detail than the key studies. Nevertheless, the glassforming tendency and stability of this compound was only known for a few. The common name ethylene glycol literally means the glycol derived from ethylene. Polyalkylene glycol monobutyl ether pgme for handling. It is a viscous liquid that is sweet, faint and transparent. Section 4 pages 162 to 180 lists oligomeric and polymeric chemicals for the category formula, r och 2ch 2 n or, n is unspecified that might contain a glycol ether component n. Specific heat, viscosity and specific weight of a water and ethylene glycol solution vary significantly with the percent of ethylene glycol and the temperature of the fluid. Show this safety data sheet to the doctor in attendance.
A glycol is an alcohol with two hydroxyl groups on adjacent carbon atoms a 1,2diol. Persistence and degradability ethylene glycol 107211 persistence and degradability readily biodegradable. Choose file properties, click the description tab, and then click additional metadata. Pdf ethylene glycol eg is an important organic compound and chemical intermediate used in a. Safety data sheet mono ethylene glycol 1 identification of the substancepreparation and companyundertaking application automotive industry. Ethylene glycol is also commonly used in heating applications that temporarily may not be operated cold in surroundings with freezing conditions such as cars and machines with water cooled engines. A normal autoclaving process is enough to return the files to their original shape and fatigue resistance. Two molecules of water from two molecules of glycol to form cyclic. Monument chemical in no way guarantees that the product from any particular lot will conform. All the properties have negative values and exhibit a minimum at the same waterrich. One molecule of water from one molecule of glycol to form aldehydes or. Mathematical model of the thermophysical properties of aqueous solutions of ethylene glycol and propylene glycol the properties necessary in the calculation of the heat transfer processes include density specific thermal capacity thermal conductivity viscosity prandtl number and their variations with the operating conditions. The chemistry and properties of dows glycols are so wide ranging, you may need.
A guide to glycols 8 sep 26, 2019 agency for toxic substances and disease registry atsdr. Glycerin is also fully miscible with phenol, glycol, propanediols, amines, and heterocyclic compounds containing a nitrogen atom in the ring e. Identification product identifier propylene glycol 40% version. At a 87 temperature known as the cloud point 50oc, pgme comes out of solution and forms a turbid 88 dispersion. Excess molar volumes, isothermal compressibility, and thermal isobaric expansivity coefficients as well as thermal pressure coefficients were. Physical properties the chemical formula for ethylene glycol is c 2 h 6 o 2, and its molecular weight is 62. Forensic toxicology laboratory office of chief medical examiner city of new york ethylene glycol and propylene glycol by gas chromatographymass spectrometry principle ethylene glycol hoch2ch2oh is a relatively nonvolatile liquid used as a major component of antifreeze fluids. Monoethylene glycol meg is widely used by the oil and gas markets in wellheads and pipelines to prevent hydrate formation at pipeline conditions. This information includes synonyms, chemical formula and structure, and identification numbers.
The expert panel also needs to determine whether additional data are needed in order to arrive at a conclusion on the safety of caprylyl glycol and other 1,2glycols in personal care products. Propylene glycol is unique among the glycols in that it is safe for humans to take internally. Gc diethylene glycol content deg 0,5 %mm maximum astm e202 acids such as acetic acid 0,005 %mm maximum din 53491 refractive index at 20. Schlumberger glycol dehydration processes remove water vapor from natural gas, which helps prevent hydrate formation and corrosion. Relative retention packaging and storagepreserve in tight containers. Utilize propylene glycol for its moisturizing properties. Triethylene glycol is a colorless liquid with a mild odor.
Propylene glycol intended for human use is designated as usp grade and is commonly found in foods, pharmaceuticals. Ethylene glycol properties software free download ethylene. Ethylene glycol is used in many different applications, but its also famous for being a deadly poison. Properties differs so much from clean water that heat transfer systems with ethylene glycol should be calculated thoroughly for actual temperature and solution. It is used to regulate humidity in pipes and cigars to. Sep 26, 2019 all atsdr toxicological profile pdf files are electronic conversions from paper copy or other electronic ascii text files. Physical properties of polyethylene glycol pegbased resins for combinatorial solid phase organic chemistry. Food additives, toothpastes, mouthwashes, tobacco, lotions, hand sanitizers and saline lotions use propylene alcohol to retain moisture. The builtin shape memory of hyflex edm files prevents stress during canal preparation by changing their spiral shape.
Ethylene glycol heattransfer fluid engineering toolbox. Additionally, derivative properties, such isobaric thermal expansion. In order to inhibitnist in ahydtaulic system,the ph of water based fluids must be maintained at 8. Mixed convection characteristics of ethylene glycol and. Pdf properties changer lets you quickly add, edit or remove properties from pdf files effortlessly. In other words, its solubility in water decreases as the solution temperature rises.
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