A comparison of pegcrosslinked and peggrafted resins morten grotli, charlotte h. Carcinogenicity and structure activity relationships. They react with oxoacids and carboxylic acids to form esters plus water. Commonly called glycerol or glycerin, 1,2,3propanetriol is the most important trihydroxy alcohol. Ethylene and propylene glycol solutions behave similarly, and are interchangeable from a design standpoint.
Aluminum alloy corrosion in the presence of ethylene glycol is presumed to be the result of acidic attack of these acids. The glycol concentration refers to the percentage of water in the glycol and it is regarded as an important process variable which has to be monitored and controlled at all times. Chemical properties of triethylene glycol cas 112276 download as pdf file download as excel file download as 2d mole file predict properties. Later, hayes and pegg determined temperaturetimetransition curves of ethylene glycolwater solutions. Density and viscosity matter water, propylene glycol and ethylene glycol have different physical properties, which determine their behavior in piping and pumping applications. It has a long track record over many decades in this application and is widely available from a number of sources. It is miscible in water, alcohol, ether, acetone, and ethylene glycol. It may also be employed as a mining chemical, cement grinding additive, initiator in the synthesis of polyether polyols and other industrial applications. The verification of a method for detecting and quantifying. Nevertheless, the glassforming tendency and stability of this compound was only known for a few. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. Monoethylene glycol is one of the most important raw materials required for industrial applications. The primary objective of this study was to verify the performance of the draft standard operating procedure developed by us epa region 3 in multiple laboratories. 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.
Propylene glycol, industrial grade, is the preferred glycol for manufacturing high. Never give anything by mouth to an unconscious person. Propylene glycol pg has become the most common heat transfer fluid used in closedloop solar heating systems that contain antifreeze. Its physical properties are quite similar to those of ethylene glycol.
Thermophysical properties of aqueous solutions used as. Diethylene glycol deg by meglobal is a lowvolatile, low viscous and hygroscopic liquid. Physical properties of triethylene glycol determined on purified samples of triethylene glycol the data provided for these properties are typical values, intended only as guides, and should not be. Gotfredsen, jorg rademann, jens buchardt, anthony j. Pdf ntriethylene glycol nteg as a surrogate for the n. Monoethylene glycol is manufactured from ethylene, a downstream product of natural gas and crude oil. Ethylene glycol is widely used to inhibit the formation of natural gas. Triethylene glycol has properties similar to other glycols and may be used preferentially in applications requiring a higher boiling point, higher molecular weight, or. It is completely miscible with water and many organic liquids. Diethylene glycol definition of diethylene glycol by the. Glycol based heat transfer fluid tech ni cal manual weba technology corp. It is a colorless, practically odorless, poisonous, hygroscopic liquid with a sweetish taste. The verification of a method for detecting and quantifying diethylene glycol, triethylene glycol.
These crystals cause renal damage and can lead to kidney failure and death. It has been shown to decrease nf200 degradation and apoptosis, as well as increasing tissue sparing baptiste et al. Ethylene glycol, diethylene glycol, dioxane and related compounds. Typical properties, not to be construed as specifications. Ethylene glycol, diethylene glycol, dioxane and related. Nov 30, 2018 ethylene glycol is a source of corrosion. Ethylene glycol is used in many different applications, but its also famous for being a deadly poison. Glycol ethers are widely used for paints, adhesives and cosmetics due to their. Gcms analysis of diethylene glycol and ethylene glycol in. Monoethylene glycol market size, share industry report, 2024. Like the two glycols, it is a sweet, syrupy liquid. The agency has determined triethylene glycol is eligible for reregistration. Oct 14, 2019 glycol plural glycols organic chemistry any aliphatic diol. Jun 25, 2019 diethylene glycol deg by meglobal is a lowvolatile, low viscous and hygroscopic liquid.
Physical properties of polyethylene glycol pegbased resins for combinatorial solid phase organic chemistry. Information regarding the physical and chemical properties of ethylene glycol is located in table 42. This information includes synonyms, chemical formula and structure, and identification numbers. Diethylene glycol deg is an organic compound with the formula hoch2ch22o. Diethylene glycol has moderate acute toxicity in animal experiments.
Polyethylene glycol an overview sciencedirect topics. Inhibitor analysis is usually offered as a free service by glycol. The glass forming tendency and the stability of the amorphous state are evaluated as a function of concentration. First aid measures description of first aid measures firstaid measures general get medical adviceattention if you feel unwell. Peg is also known as polyethylene oxide peo or polyoxyethylene poe, depending on its molecular weight. Between the two, ethylene glycol c2h6o2 is a better heat transfer fluid than. Ethylene glycol and propylene glycol have similar physical properties and uses. Diethylene glycol deg is an organic compound with the formula hoch 2 ch 2 2 o.
This work reports on the thermal properties of aqueous solutions with 40, 43, 45, 48, and 50% ww of this compound measured by differential scanning calorimetry. Glycol teg as the dehydrating agent or absorbent to examine the water content of the natural gas stream when the dehydrating agent and the gas flows in counter current manner in an absorption column and to determine hydrate formation temperature and prevent its occurrence. Diethylene glycol, ch2ohch2och2ch2oh, is similar in properties to meg mono ethylene glycol, but deg has a higher boiling. Chemworld is also a distributor of dipropylene glycol and other specialty chemicals. Chemical properties of triethylene glycol cas 112276. Structure, properties, spectra, suppliers and links for. Anyadiegwu, anthony kerunwa, patrick oviawele department of petroleum engineering, federal university of technology. Information regarding the chemical identity of ethylene glycol is located in table 41. Ethylene glycol monoethylene glycol meg ethylene glycol in its pure form, it is an odorless, colorless, syrupy liquid with a sweet taste. Download fulltext pdf ntriethylene glycol nteg as a surrogate for the nmethyl group. Flammable andor toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. Glycolbased heat transfer fluid tech ni cal manual weba technology corp.
Ethylene glycol can be recovered from the natural gas and reused as an inhibitor after purification treatment that removes water and inorganic salts. 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. The ld 50 for small mammals has been tested at between 2 and 25 gkg, less toxic than its relative ethylene glycol, but still capable of causing toxicity in humans. Gcms analysis of diethylene glycol and ethylene glycol in toothpaste using thermo scientific tracegold gc column with safeguard anila i khan, thermo fisher scientific, runcorn, cheshire, uk abstract this application note demonstrates the semiquantitative analysis of diethylene glycol deg and ethylene glycol eg. It is a colorless, practically odorless, poisonous, and hygroscopic liquid with a sweetish taste. Based on the available data, the agency has concluded that triethylene glycol exhibits low toxicity and exposures to triethylene glycol used as both an active or inert ingredient do not present risks of concern to the agency. Chemical and physical properties of triethylene glycol. Although propylene glycol has physical properties much like those of ethylene glycol, its physiological properties are quite different. Physical properties of polyethylene glycol pegbased. Diethylene glycol, triethylene glycol, tetraethylene glycol, 2butoxyethanol and 2methoxyethanol in ground and surface waters. Propylene glycol technical grade is intended for use as a raw material in the production of saturated and unsaturated polyester resins. Application to sansalvamide a peptide analogs article pdf available in chemical communications 4444.
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. Propylene glycol is used extensively as a substitute for ethylene. The properties necessary in the calculation of the heat transfer processes and piping circuits include. We are 100% internet based and focus on seo to provide easy to find, easy to locate specialty chemicals and related feed equipment at competitive pricing. Polyethylene glycol peg is a hydrophilic polymer that may have neuroprotective properties such as aiding in repairing damaged axons kwon et al. Usually, the manufacturer gives the operating glycol circulation rate as that which is required. This lesson goes over this substances properties, names, structures, and formula. Monoethylene glycol is commonly known as ethylene glycol that is a colorless, sweet tasting, and odorless organic compound. It appears diethylene glycol is more hazardous to humans than implied by oral toxicity data in laboratory animals. Ethylene glycol is used in the natural gas industry to remove water vapor from natural gas before further processing, in much the same manner as triethylene glycol teg hydrate inhibition. Under normal conditions, it has no detectable odor, however, under high vapor concentrations, a slightly sweet odor may be detected. Safety data sheet mono ethylene glycol 1 identification of the substancepreparation and companyundertaking application automotive industry. Pdf ntriethylene glycol nteg as a surrogate for the. Thermal properties of ethylene glycol aqueous solutions.
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