If teg is needed above these concentrationsthen additional stripping of the water is required using dry, preheated. The propylene glycol family of chemical compounds consists of monopropylene glycol pg, dipropylene glycol dpg. Physical properties of polyethylene glycol pegbased. Just remember that it should be handled as though it were a food. Safety data sheet page 1 of 6 may 11, 2017 section 1. Natural gas processing consists of separating all the various. Physical properties the chemical formula for ethylene glycol is c 2 h. Nexantchemsystems, coal to meg, changing the rules of the game pdf. Mixed convection characteristics of ethylene glycol and. Propylene glycol is used extensively as a substitute for ethylene. Marpetg fs is a clear transparent thermoplastic polyethylene terephthalate glycol polyester flat sheet that offers excellent strength to weight ratio, outstanding optical clarity, superior chemical resistance, durability, good fire performance and is 100% recyclable.
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. 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. Dry glycol flows down the tower from the top, from tray to tray or through packing material. The atsdr toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the hazardous substance described here. This is the primary limitation in enhancing the performance and compactness of many electronic devices in engineering. Choose file properties, click the description tab, and then click additional metadata. Ifthere is backpressure on the regenerator this reduces to 99. Ethylene glycol heattransfer fluid engineering toolbox. Mixed convection, square enclosure, nanofluid, water, ethylene glycol.
Conde engineering 2011 properties of working fluids brines 9 9 fig. Pdf ethylene glycol eg is an important organic compound and chemical intermediate used in a. The retention time for propylene glycol is 4 min1,2propanediol 57556. Other pertinent literature is also presented, but is described in less detail than the key studies. All the properties have negative values and exhibit a minimum at the same waterrich. 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. First aid measures general advice consult a physician. Show this safety data sheet to the doctor in attendance. Excess molar volumes, isothermal compressibility, and thermal isobaric expansivity coefficients as well as thermal pressure coefficients were. 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. Kister equation, and the corresponding parameters are derived. Please note that the layout and pagination of this pdf file are not identical to those of the printed cicad.
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. Puremeg monoethylene glycol reclamation and regeneration unit. Information regarding the physical and chemical properties of ethylene glycol is located in table 42. Thermophysical properties of glycols and glymes acs publications. It is used to regulate humidity in pipes and cigars to. Utilize propylene glycol for its moisturizing properties. Rheological properties of polyethylene glycol solutions. Glycols depress waters freezing point providing protection to temperatures as. 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. 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.
Propylene glycol intended for human use is designated as usp grade and is commonly found in foods, pharmaceuticals. Table 4 lists various physical and chemical properties and constants for the propylene glycols. Propylene glycol is an organic compound with many industrial uses. Safety data sheet mono ethylene glycol 1 identification of the substancepreparation and companyundertaking application automotive industry. Pdf properties changer lets you quickly add, edit or remove properties from pdf files effortlessly. Physical properties of polyethylene glycol pegbased resins for combinatorial solid phase organic chemistry. Ethylene glycol safety data sheet according to federal register vol. Properties differs so much from clean water that heat transfer systems with ethylene glycol should be calculated thoroughly for actual temperature and solution. Schlumberger glycol dehydration processes remove water vapor from natural gas, which helps prevent hydrate formation and corrosion. Table 5 gives a breakdown by percentage for the principal uses of propylene glycol in the united states. Ethylene glycol, also called ethane1,2diol, the simplest member of the glycol family of organic compounds.
Because of its high boiling point and affinity for water, ethylene glycol is a. Diethylene glycol deg, triethylene glycol teg typical end products. The properties reported above are typical physical properties. Relative retention packaging and storagepreserve in tight containers. It has less solubility in acetone, diethyl ether, and dioxane. 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. It has been shown to decrease nf200 degradation and apoptosis, as well as increasing tissue sparing baptiste et al. Food additives, toothpastes, mouthwashes, tobacco, lotions, hand sanitizers and saline lotions use propylene alcohol to retain moisture. A glycol is an alcohol with two hydroxyl groups on adjacent carbon atoms a 1,2diol. Thermal properties of ethylene glycol aqueous solutions. Conventional heat transfer fluids such as water, oil and ethylene glycol has a low thermal conductivity. Information regarding the chemical identity of ethylene glycol is located in table 41. The chemistry and properties of dows glycols are so wideranging, you. Information on basic physical and chemical properties physical state colourless liquid.
A guide to glycols 8 sep 26, 2019 agency for toxic substances and disease registry atsdr. Synthesis, properties, and applications of polyethylene. It is an excellent solvent completely miscible with water and many organic compounds such as ethanol, benzene, toluene, castor oil, carbon tetrachloride, monoethanolamine and diethanolamine. In other words, its solubility in water decreases as the solution temperature rises. United states office of environmental revised december. Nevertheless, the glassforming tendency and stability of this compound was only known for a few. Meek, health canada, ottawa, canada published under the joint sponsorship of the united nations environment programme, the.
Monoethylene glycol meg is widely used by the oil and gas markets in wellheads and pipelines to prevent hydrate formation at pipeline conditions. Epa has not classified ethylene glycol for carcinogenicity. Ucon50 5100 shows the property of inverse 86 solubility. The chemistry and properties of dows glycols are so wide ranging, you may need. The builtin shape memory of hyflex edm files prevents stress during canal preparation by changing their spiral shape. Triethylene glycol is a colorless liquid with a mild odor. What links here related changes upload file special pages permanent.
Polyethylene glycol peg is a hydrophilic polymer that may have neuroprotective properties such as aiding in repairing damaged axons kwon et al. Excess volumes ve, viscosity deviation, excess refraction. Sep 26, 2019 all atsdr toxicological profile pdf files are electronic conversions from paper copy or other electronic ascii text files. Safety data sheet page 2 of 6 may 11, 2017 section 4.
This lesson goes over this substances properties, names, structures, and formula. One must remember that the temperature of the refrigerant will be 10 15 f below your glycol solution temperature. Physical properties the chemical formula for ethylene glycol is c 2 h 6 o 2, and its molecular weight is 62. Ethylene glycol is used in many different applications, but its also famous for being a deadly poison. Corresponding authors a hkust shenzhen research institute, no. Department of health and human services, public health service. Glycerin is also fully miscible with phenol, glycol, propanediols, amines, and heterocyclic compounds containing a nitrogen atom in the ring e. Download as pdf file download as excel file download as 2d mole file predict. Two molecules of water from two molecules of glycol to form cyclic.
Polyalkylene glycol monobutyl ether pgme for handling. Epa has not classified the glycol ethers for carcinogenicity. All atsdr toxicological profile pdf files are electronic conversions from paper copy or other electronic ascii text files. In order to inhibitnist in ahydtaulic system,the ph of water based fluids must be maintained at 8.
Densities and volumetric properties of ethylene glycol. Rheological properties of polyethylene glycol solutions and gels. 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. Users are referred to the original paper copy of the toxicological profile for the official text, figures, and tables. Monument chemical in no way guarantees that the product from any particular lot will conform. 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. 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. This conversion may have resulted in character translation or format errors. Polyethylene glycol an overview sciencedirect topics.
This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. 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. One molecule of water from one molecule of glycol to form aldehydes or. Later, hayes and pegg determined temperaturetimetransition curves of ethylene glycolwater solutions. It is a viscous liquid that is sweet, faint and transparent. To save the metadata to an external file, click save and name the file. Propylene glycol, industrial grade, is the preferred glycol for manufacturing high. Firstaid measures eye contact flush eyes with water for 15 minutes. Simply rightclick on a pdf and select pdf properties changer edit pdf properties to begin editing. Meanwhile, 1,3 propylene glycol, named trimethylene glycol, is. In offshore deepwater gas production facilities, where the exposure to lower temperatures in subsea pipelines is common, meg is used for hydrate inhibition. 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. This information includes synonyms, chemical formula and structure, and identification numbers.
Persistence and degradability ethylene glycol 107211 persistence and degradability readily biodegradable. Ethylene glycol properties software free download ethylene. The common name ethylene glycol literally means the glycol derived from ethylene. Adding propylene glycol to cosmetics and medicines will help them retain their moisture content. One molecule of water from two molecules of glycol to form a polyglycol. A normal autoclaving process is enough to return the files to their original shape and fatigue resistance.
Propylene glycol is unique among the glycols in that it is safe for humans to take internally. Additionally, derivative properties, such isobaric thermal expansion. Regulatory information cas number flash point, 112276. Everything you wanted to know about glycol a brewery. 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.