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. About meglobal meglobaltm is a world leader in the manufacture and marketing of merchant monoethylene glycol meg and. Ethylene glycol hoch 2 ch 2 oh was, initially, the principal chemical agent in this process, has a very strong affinity for water and when the glycol is in contact with a stream of waterwet natural gas. Propylene glycol is a synthetic liquid substance that absorbs water. This is a brief description of the properties of the ethylene glycol for industrial porpouses. Glycol ethers are a group of solvents based on alkyl ethers of ethylene glycol or propylene glycol commonly used in paints and cleaners. Show this safety data sheet to the doctor in attendance. In the present work, we report the density of binary mixtures containing ethylene glycol eg, diethylene glycol. For many heattransfer applications it is necessary to use a heattransfer fluid with lower freezing point than water. Rheological properties of polyethylene glycol solutions.
Propylene glycol is essentially nontoxic, and it can be used as a solvent for drugs and as a moisturizing agent for foods. Salt water solutions we study here basically aqueous solutions of common salt nacl, 0. Thermal conductivity and viscosity have been measured experimentally. To maintain the quality of concrete during the stages of mixing, transporting, placing, and curing in adverse weather conditions 4. Propylene glycol has been identified in at least 5 of the 1,416 npl sites. Propylene glycol is used by the chemical, food, and pharmaceutical industries as an antifreeze when leakage might lead to contact with food. One study using propylene glycol evaluated the reproductive effects of male and female rats over two generations. Identification of the substancemixture and of the companyundertaking date issued 04. Effect of incorporation nanocrystalline corn straw cellulose and polyethylene glycol on properties of biodegradable films. 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. Chemical and physical properties of propylene glycol. Comparing ethylene glycol and propylene glycol properties as antifreeze engineering toolbox resources, tools and basic information for engineering and design of technical applications.
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. To achieve certain properties in concrete more effectively than by other means 3. Thermophysical properties measurement of nano cellulose in. Click here to buy this book in print or download it as a free pdf.
The propylene glycolwater mixture has higher viscosity than the other two nanofluids it was higher than nanowater and nanoegwater. These solvents typically have a higher boiling point, together with the favorable solvent properties of lowermolecular weight ethers and alcohols. Glycol dehydration process an overview sciencedirect topics. Other pertinent literature is also presented, but is described in less detail than the key studies. When freeze conditions exist glycol and propylene glycol. Groups of male and female spraguedawley rats were exposed via inhalation to 0, 300, 1,000, or 3,000 parts per million ppm of propylene glycol for 6 hoursday for 5 weeks. The aim of the present study was to evaluate the bactericidal activity of propylene glycol, glycerine, polyethylene glycol 400 peg 400, and polyethylene glycol peg against selected. Ethers nomenclature of ethers general methods of preparation of aliphatic ethers. Solutions national council of educational research and. Kister equation, and the corresponding parameters are derived. To overcome certain emergencies during concreting operations chapter 6 admixtures for concrete fig. Effect of incorporation nanocrystalline corn straw cellulose. Like other alcohols, propylene glycol is oxidized by liver enzymes.
It must be emphasized that it is the users responsibility to consult area and countryspecific. The properties necessary in the calculation of the heat transfer processes and piping circuits include. Preparation and properties of cuso 4, agno 3 and k 2 cr 2 o 7. Information regarding the chemical identity of ethylene glycol is located in table 41.
Indeed, owing to its unique properties and versatile commercial applications, a variety of. Physicochemical properties of polypropylene glycols polypropylene glycol ppg samples of different molecular mass were characterized using differential scanning calorimetry, modulated differential scanning calorimetry, thermogravimetry and thermally stimulated current tsc spectroscopy. Consideration should be given to having appropriate expansion space for the solution and to the need for an inhibited glycol. Propylene glycol is an ideal solvent to mix chemicals while developing photographic films.
Consideration should be given to having appropriate expansion space for the solution and to the need for an inhibited glycol based product such as dowfrost. Thermophysical properties measurement of nano cellulose in ethylene glycol water. Ethylene glycol is a liquid packed in bulk, totes ibc tanks and drums. Ethylene glycol safety data sheet according to federal register vol. Safety data sheet polyethylene glycol 400 version 1. Also, the density and viscosity of the samples were measured. Aromatic alcohols preparation and properties of phenols and benzyl alcohol. Rheological properties of polyethylene glycol solutions and gels. Initially, the process used ethylene glycol as the absorbent but, with the advancement of the technology, glycol dehydration now involves the use of an aqueous solution of a glycol derivative in which the glycol is either diethylene glycol deg or triethylene glycol teg table 7. Applications propylene glycol uspep is a widely used ingredient in pharmaceutical, food, cosmetic, personal care, flavors and animal feed applications. In general, glycol and other activators affect compound properties through crosslink modification, filler network formation and filler agglomeration. Ethylene glycol and propylene glycol have similar physical properties and uses. Ethylene glycol can be recovered from the natural gas and reused as an inhibitor after purification treatment that removes water and inorganic salts. 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.
The most common hvac glycols include ethylene and propylene based compounds. Chemical properties of propylene glycol cas 57556 download as pdf file download as excel file download as 2d mole file predict properties. Feb 04, 2020 polyethylene glycol peg is a biocompatible, synthetic, hydrophilic polyether compound that has many applications, mostly in the medical industry, but also in the chemical and industrial sectors. Physical properties of liquids and gases tables of physical properties of liquids and gases c1 density of liquids. The subject of the current petition is a request for the approval of propylene glycol to the national list. M water sodiumchloride liquid mixtures, called brines. Find wt% teg in lean glycol solution under atmospheric pressure and 400 mmhg absolute pressure. Meglobal provides information about its products through a variety of product literature.
Product information dowfrost inhibited propylene glycolbased heat transfer fluid typical concentrations of dowfrost fluid required to provide freeze and burst protection at various temperatures percent dowfrost fluid concentration required temperature for freeze protection for burst protection cf volume % volume %7 20 18 1212 10 29 20. Magnetic measurements of the samples were carried out. Propylene glycol 1, 2propanediol is an organic compound a diol alcohol, usually a tasteless, odorless, and colorless clear oily liquid that is hygroscopic and miscible with water, acetone, and chloroform. Conjugated polymers with oligoethylene glycol side chains. The means by which propylene glycol vapor produces its effect on dropletborne bacteria is discussed and data relating the bactericidal properties of propylene glycol in vitro to the lethal action of its vapor is presented. Information regarding the physical and chemical properties of ethylene glycol is located in table 42. The most widely studied of physical properties include the uid rheology, thermal conductivity and electrical parameters. Physical properties the glycol ethers are colorless liquids with a slight odor. Table a1 molar mass, gas constant, and criticalpoint properties table a2 idealgas specific heats of various common gases table a3 properties of common liquids, solids, and foods table a4 saturated watertemperature table table a5 saturated waterpressure table table a6 superheated water table a7 compressed liquid water table a8 saturated icewater vapor. Calculate recovery ethylene glycol recoveredethylene glycol taken. Pgi is an important cosolvent for architectural waterbased paints, and is also used as an.
Excess volumes ve, viscosity deviation, excess refraction. Ethylene glycol eg is a major industrial chemical used in the production of polyester fibers and films, antifreeze and vitrification formulations, and numerous other applications. Ethylene glycol heattransfer fluid engineering toolbox. In the studies with rats, little if any 14coxalate or 14ctriethylene glycol in conjugated form was found in the urine.
Persistence and degradability ethylene glycol 107211 persistence and degradability readily biodegradable. Ethylene glycol 5500 wikisource, the free online library. In rabbits dosed with 200 or 2000 mgkg triethylene glycol respectively excreted 34. Methods of preparation of trihydric alcohols properties uses. Pdf bactericidal activity of propylene glycol, glycerine. In food processing systems the common heattransfer fluid is based on propylene glycol. Propylene glycol can be used in many of the same products that contain ethylene glycol. Influence of the base fluid on the thermophysical properties of pvt. Specifications ethylene glycol spec tcc click here to download shipping information tccs ethylene glycol meg is available for shipping throughout the continental united states with one 1 week lead time. Highperformance solvents glymes glycol diethers, or glymes, are aprotic, saturated polyethers that offer high solvency, high stability in strong bases and moderate stability in acid solutions. The glycol dehydration process is an example of a process that provides absorption dehydration, and in the process, a liquid desiccant provides the means to absorb water from the gas stream. Glycerine is an material of outstanding utility with many areas of application. Internals for glycol dehydration systems hat international supplies a comprehensive range of column internals for the effective dehydration of gas using glycol desiccant, proven in dozens of column installations worldwide.
The common name ethylene glycol literally means the glycol derived from ethylene. It has low vapor pressures at room temperature and, therefore, low potential for significant inhalation exposure. Ethylene glycol is a clear, colorless, odorless, sweettasting liquid. Electrical properties of aluminum oxide ethylene glycol. It is manufactured by the hydration of propylene oxide. The paper presents electrical properties of aluminium oxide al 2o 3 nano uids based on ethylene glycol eg. Nanoparticles used to produce nanosuspensions employed in measurements have size between 100 300 nm. Propylene glycol is a 3carbon compound derived from propylene which has applications in both industry and medicine. Glycol dehydration process an overview sciencedirect. Microfluidic fabrication of polyethylene glycol microgel capsules with tailored properties for the delivery of biomolecules. Material properties product properties 1,3 butylene glycol cq low molecular. Ethylene glycol is used in many different applications, but its also famous for being a deadly poison. This information includes synonyms, chemical formula and structure, and identification numbers. The widespread use of ethylene glycol as an antifreeze is based on its ability to lower the freezing point when mixed with water.
Microsoft word mokon gtf propylene glycol technical data author. Information on basic physical and chemical properties physical state colourless liquid. Surface tension of ethylene glycolbased nanofluids containing various types of nitrides. Three types of nanofluids thermophysical properties were tested. Conjugated polymers with oligoethylene glycol side chains for improved photocatalytic hydrogen evolution. Everything you wanted to know about glycol a brewery glycol system guide updated 21107 by jim vandergiessen jr, pro refrigeration inc. Indeed, owing to its unique properties and versatile commercial applications, a variety of chemical systems e. This lesson goes over this substances properties, names, structures, and formula. A glycol is an alcohol with two hydroxyl groups on adjacent carbon atoms a 1,2diol. Ethylene glycol eg is an important organic compound and chemical intermediate used in a large number of industrial processes e. Downloaded by tianjin university on 23 november 2012. Ethylene glycol is widely used to inhibit the formation of natural gas clathrates hydrates in long multiphase pipelines that convey natural gas from remote gas fields to a gas processing facility. Glycol heattransfer fluids ethylene glycol versus propylene glycol water is probably the most efficent heattransfer fluid known. Part of that research was the experimental studies on the properties of nanofluids.
The key to glycerine s technical versatility is a unique combination of physical and chemical properties, ready compatibility with many other substances, and easy handling. Physical, thermodynamic, environmental, transport, safety, and health related. Epa has not classified the glycol ethers for carcinogenicity. Understanding glycol laboratory analysis tt0380312 8287 214th street west lakeville, minnesota 55044 9524694965 fax 9524691252 page 1 of 3 glycol is commonly used for freeze protection in many building closed chilled loops and hot loops. Nexantchemsystems, coal to meg, changing the rules of the game pdf. Volumetric properties of aqueous solutions of ethylene glycols in. Pdf engineering and operating guide for dowfrost and. Ethylene glycol, also called ethane1,2diol, the simplest member of the glycol family of organic compounds.
Aqueous solutions of propylene glycol, industrial grade, display excellent antifreeze. Propylene glycol is a chemical that has physical and chemical properties that are similar to ethylene glycol, but it does not cause the same human health effects. If it did not freeze, water would be the ideal heattransfer fluid for cooling applications. A guide to glycols 10 glycol based solutions can give excellent burst protection across a wide range of cold temperatures as indicated in figure 1. Effect of the molecular weight of polyethylene glycol core. Pdf ethylene glycol eg is an important organic compound and chemical intermediate used in a. Because of its high boiling point and affinity for water, ethylene glycol is a useful desiccant. Safety data sheet mono ethylene glycol 1 identification of the substancepreparation and companyundertaking application automotive industry. Jul 23, 2015 the microstructure of such hydrogels is known to be heterogeneous, yet little is known about the specific structure itself, how it is impacted by the molecular parameters of the macromer, or its impact on macroscopic gel properties. Propylene glycol is also used to make polyester compounds, and as a base for deicing solutions. The atsdr toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the hazardous substance described here. Heterogeneity and its influence on the properties of.
Physical properties the chemical formula for ethylene glycol is c 2 h 6 o 2, and its molecular weight is 62. Microfluidic fabrication of polyethylene glycol microgel. Atmospheres containing propylene glycol vapor are invisible, odorless, and nonirritating. The most intense peak observed in the mass spectra of di and triethylene glycol is at mz 45. Prepare and analyze the filters together with working standards steps 5, 6, and 10 through 12. Although propylene glycol has physical properties much like those of ethylene glycol, its physiological properties are quite different.
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