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TETRAETHYLENE GLYCOL DIMETHYL ETHER

Tetraethylene Glycol Dimethyl Ether(tegdme or tetraglyme) is a polar aprotic solvent with excellent chemical and thermal stability. Tetraethylene Glycol Dimethyl Ether is high boiling point and stability makes it an ideal candidate for separation processes and high temperature reactions.

CAS NUMBER: 143-24-8

SYNONYM:

Bis[2-(2-methoxyethoxy)ethyl] ether ; Tetraglyme ; Dimethoxytetraglycol ; TEGDME ; tetraglyme ; E181 ; Dimethoxytetraethylene glycol ; Dimethoxytetraglycol ; 2,5,8,11,14-PENTAOXAPENTADECANE; Ansul ether 181AT ; Nissan uniox MM 200 ; Glyme-5 ; UNII-78L136FLZ9 ; Ether, bis(2-(2-methoxyethoxy)ethyl) ; Methyltetraglyme200 ;E181 (Ether)

Tetraethylene Glycol Dimethyl Ether (TEGDME or tetraglyme) is a polar aprotic solvent with excellent chemical and thermal stability. Its high boiling point and stability makes it an ideal candidate for separation processes and high temperature reactions. Tetraethylene Glycol Dimethyl Ether is also used in lithium-ion battery technology and combined with trifluoroethanol as a working pair for organic absorption heat pumps. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Tetraethylene Glycol Dimethyl Ether is listed as a Substance of Very High Concern under reach regulations. The glow discharge plasma deposition (GDPD) of Tetraethylene Glycol Dimethyl Ether is introduced as a novel method for obtaining surfaces that are resistant to protein adsorption and cellular attachment. Analysis of films by x‐ray photoelectron spectroscopy and several biological assays indicate the formation of a foulingresistant, PEO‐like surface on several substrata (e.g., glass, polytetrafluoroethylene, polyethylene). Adsorption of 125I‐radiolabelled proteins (fibrinogen, albumin and IgG) from buffer and plasma was very low (typically <20 ng/cm2) when compared to the untreated substrata, which exhibited much higher levels of protein adsorption.

Not all coated substrata adsorbed equal amounts of protein (e.g., coated glass samples typically adsorbed more protein than coated polyethylene or coated polytetrafluoroethylene samples), suggesting that the substratum used may affect the amount of protein adsorbed. Measurement of dynamic platelet adhesion, using epifluorescent video microscopy, and endothelial cell attachment further demonstrates the short‐term nonadhesiveness of these surfaces. An electrolyte based on a mixture of Tetra(Ethylene Glycol) DımetyL Ether (TEGDME) and 1,3-dioxolane (DOXL) is studied for a use in lithium–sulfur battery. The maximum ionic conductivity is found at the intermediate mixing ratio of Tetraethylene Glycol Dimethyl Ether:DOXL=30:70, because Tetraethylene Glycol Dimethyl Ether readily solvates LiCF3SO3 and DOXL effectively reduces the viscosity of the electrolyte medium. The lithium–sulfur battery based on the binary electrolyte shows two discernable voltage plateaux at around 2.4 and 2.1 V, which correspond to the formation of soluble polysulfides and of solid reduction products, respectively. The UV spectral analysis for Tetraethylene Glycol Dimethyl Ether -based and DOXL-based electrolytes suggests that the shorter polysulfide is favourably formed for DOXL-based electrolyte in the upper voltage plateau at around 2.4 V. The lower voltage plateau at around 2.1 V is highly dependent on the Tetraethylene Glycol Dimethyl Ether:DOXL ratio. The sulfur utilization in the lower voltage plateau region can be correlated with the viscosity of the electrolyte, but with the ionic conductivity. The low polysulfide diffusion for the electrolyte with high viscosity causes significant passivation at the surface of the positive electrode and results in low sulfur utilization.

In this paper we exploit the use of a Li2S8-containing electrolyte based on a non-flammable Tetraethylene Glycol Dimethyl Ether in a semi-liquid lithium cell, characterized by a configuration usually employed in conventional lithium ion batteries. The cell, using a sulfur-free, Super P carbon electrode shows a capacity varying from 430 mAh g−1 s to 700 mAh g−1S. The cycling tests show that the stability of the cell is strongly affected by the voltage cutoff directly controlling the electrochemical process, in particular the polysulfide shuttle reaction. In this respect, XPS measurement shows the deposition of Li2S2 salt at the lithium electrode surface as the cell voltage cutoff is enlarged, thus suggesting that the use of the reduced voltage and capacity regimes may lead to higher stability. Tetraethylene Glycol Dimethyl Ether, under the best control regime, the 2 V cell delivers a capacity of 530 mAh g−1S, with extremely low polarization and cycling stability extended up to 100 charge–discharge cycles. Furthermore, we demonstrate that enhanced performances may be effectively reached by adding LiNO3 salt to the electrolyte solution to form a stable, protective SEI film on the lithium surface, thus avoiding the shuttle process and increasing the cell efficiency, even under a full voltage cutoff range, i.e. extending from 1 V to 3 V. A novel dimethyl sulfoxide/1,3-dioxolane based electrolyte is proposed for lithium/carbon fluorides (Li/CFx) batteries to enhance the discharge voltage plateau and energy density.

Conductivities of the electrolyte of 1 mol L−1 LiBF4/DMSO+1,3-DO with different volume ratios are not identical, which have a maximum of 14.85 mS cm−1. From the tests of galvanostatic discharge, the discharge voltage plateau of the Li/CFx battery with an electrolyte of 1 mol L−1 LiBF4/DMSO+1,3-DO (5:5, v:v) can reach 2.69 V at 0.1 C, delivering a maximum discharge capacity of 831 mAh g−1 and the highest energy density of 2196 Wh kg−1. Compared to Li/CFx batteries with an electrolyte of 1 mol L−1 LiBF4/PC+DME (5:5, v:v), the energy density of Li/CFx batteries with an electrolyte of 1 mol L−1 LiBF4/DMSO+1,3-DO (5:5, v:v) has been improved more than 12%. With the help of XRD, SEM, TEM, EIS, FT-IR and GC-MS analysis, the results of this work suggest that DMSO/1,3-DO based electrolyte can significantly improve the discharge performance of Li/CFx batteries and keep a good electrochemical stability during discharge. The main reason for improvement of discharge performance is decreasing of both the overpotential of electrochemical polarization of CFx cathodes during discharge and the overpotential of ohmic polarization by increasing the ion conductivity of electrolyte.

The lithium/sulfur (Li/S) cell is a liquid electrochemical system, in which the dissolution of lithium polysulfide (PS, the series of the sulfur reduction intermediates) plays an essential role in the cell's performance. In solution, the PS undergo a series of complicated disproportionations, as described by a general equation of Li2Sn → m/8S8 + Li2Sn−m, to form the less soluble sulfur and low-order PS, which become inactive once precipitated out of the liquid electrolyte or deposited into the pores of separator. Based on the hard and soft acids and bases (HSAB) theory, quaternary ammonium cations are expected to stabilize the PS anions through a chemical interaction between the soft acid and soft base. In this paper, we report a significant improvement in the capacity retention of a Li/S cell by introducing a tetrabutylammonium triflate (NBu4SO3CF3) or an N-methyl-N-butylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) into the liquid electrolyte. For example, by using an electrolyte of 0.25 mol kg−1 LiNO3–0.25 mol kg−1 PYR14TFSI dissolved in a 1:1 (wt.) mixture of dimethyl ether (DME) and 1,3-dioxolane (DOL), a Li/S cell with a cathode containing 77% sulfur and a 2 mg cm−2 sulfur loading exhibited an initial capacity of 1227 mAh g−1 and retained a capacity of 875 mAh g−1 after 40 cycles when cycled at 0.2 mA cm−2 between 1.7 V and 2.8 V. We contribute the improved performance to the stabilized PS anions by the added quaternary ammonium cations.Highlights are, Chemical stability of lithium polysulfide greatly affects Li/S cell's cycling performance. Quaternary ammonium stabilizes polysulfide and increases Li/S cell's capacity retention.

LiNO3 effectively suppresses redox shuttle and increases Li/S cell's charging efficiency. LiNO3 is gradually consumed and its improvement is eventually vanished with cycling. Densities (ρ) and viscosities (η) for water (W) + triethylene glycol (TrEG), W + tetraethylene glycol (TeEG), and W + Tetraethylene Glycol Dimethyl Ether (TeEGDME) were measured for the whole range of composition at five different temperatures ranging from 303.15 K to 323.15 K. Surface tensions for these systems were measured at 303.15 K for different mole fractions. The excess molar volumes, VmE, and excess viscosities, (ηE), were calculated from measured parameters. Derived volumetric and viscosimetric properties were fitted to Redlich–Kister type equation. The properties were found to change significantly with increasing the number of glycol units and to be greatly affected by methyl substitution within the glycol unit. For unsubstituted glycols a gradual increase in density and viscosity was observed on increasing the concentration, whereas for the methyl-substituted glycol Tetraethylene Glycol Dimethyl Ether sharp maxima were apparent in the density–composition and viscosity–composition curves. The surface tensions of aqueous solutions of methyl-substituted glycol Tetraethylene Glycol Dimethyl Ether were found to be significantly lower than other aqueous glycols.Highlights are; Extended information on volumetric properties of aqueous glycols is obtained. Extended information on viscosimetric properties of aqueous glycols is obtained. New data on surface tension for the above binary systems are collected. Methyl-substitution in the glycol affects the above properties significantly. (Characterization of N-Methyl-N-Butylpyrrolidinium Bis(trifluoromethanesulfonyl)imide-LiTFSI-Tetraethylene Glycol Dimethyl Ether Mixtures as a Li Metal Cell Electrolyte).

We have employed Tetraethylene Glycol Dimethyl Ether (TEGDME) as a polymer solvent in mixed electrolytes composed of N-methyl-N-butyl pyrrolidinium bis(trifluoromethanesulfonyl)imide PYR14TFSI , LiTFSI, and Tetraethylene Glycol Dimethyl Ether and characterized their physical and electrochemical properties as well as the cyclability of Li/S cells with PYR14TFSI +x LiTFSI , x = moles LiTFSI / kg PYR14TFSI TEGDME ( y= kg TEDGDME/kg PYR14TFSI) electrolyte. The addition of the Tetraethylene Glycol Dimethyl Ether polymer solvent to the PYR14TFSI +0.2mLiTFSI+y. Tetraethylene Glycol Dimethyl Ether mixtures resulted in a significant enhancement of ionic conductivity, particularly at lower temperatures. Interfacial impedance and galvanostatic Li cycling measurements show that the PYR14TFSI +0.2mLiTFSI+y. Tetraethylene Glycol Dimethyl Ether ternary mixture exhibits excellent compatibility with Li metal electrodes. The use of the ternary mixture as an electrolyte in a Li/S cell provided good charge and discharge capability of the cell at room temperature with a discharge capacity of 887 mAh/g sulfur at 0.054 Ma/cm2 and at low temperature (~0 °C ) with a discharge capacity of about 440mAh/g sulfur at 0.033mA/cm2 for the first cycle, respectively (theoretical specific capacity 1672mAh/g ( sulfur). In addition, the cell tested at 0’C exhibited a stable cyclability after the 5th cycle , with a discharge capacity of 248 mAh/g sulfur for the 20th cycle.

Viscosity in Water + Ethylene Glycol Dimethyl, +Diethylene Glycol Dimethyl, +Triethylene Glycol Dimethyl, and +Tetraethylene Glycol Dimethyl EtherS at 298.15 K; The viscosity in binary liquid mixtures of water with ethylene glycol dimethyl ether (1,2-dimethoxyethane), CH3OCH2CH2OCH3, diethylene glycol dimethyl ether (bis(2-methoxyethyl) ether),CH3OCH2CH2OCH2CH2OCH3, triethylene glycol dimethyl ether (1,2-bis(2-methoxyethoxy)ethane), CH3OCH2(CH2OCH2)2CH2OCH3, and Tetraethylene Glycol Dimethyl Ether (2,5,8,11,14-pentaoxapentadecane), CH3OCH2(CH2OCH2)3CH2OCH3, have been determined at 298.15 K over the whole range of mixture compositions. The viscosity data have been analyzed by using the viscosity equations of McAllister and Heric. The values of the quantity Δη, which refer to the deviations of the experimental values of the dynamic viscosities of the mixtures from the mole fraction mixture law values, have been found to be positive for all the mixtures. The deviations in viscosity data Δη have been fitted to the Redlich−Kister polynomial relation to estimate the binary coefficients. Also, the values of the parameter d12 have been calculated from the equation ln η = x1 ln η1 + x2 ln η2 + x1x2d12, where η1 and η2 refer to the dynamic viscosities of the two pure liquids 1 and 2 whose mole fractions in the mixture are x1 and x2, respectively. The values of d12 indicate the existence of a specific interaction between dissimilar molecules.

IUPAC NAME:

1-methoxy-2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethane;Ether ; bis(2-(2-methoxyethoxy)ethyl); Bis (2-(2-methoxyethoxy)ethyl)ether ; 2,5,8,11,14 - Pentaoxapentadecane ; Bis (2-(2-methoxyethoxy)ethyl)ether

TRADE NAME:

Methyltetraglyme200 ; Nissan uniox MM 200 ; E181 (Ether) ; Glyme 5 ; NSC 65624 ; UNII-78L136FLZ9; Ansul ether 181AT ; BRN 1760005 ; AI3-01596

OTHER NAME:

70992-84-6 ; 1371582-33-0; 2088100-90-5; 37221-95-7; 71767-64-1; 2 3783-42-8

The first discharge curve of a sodium–sulfur cell using a Tetraethylene Glycol Dimethyl Ether liquid electrolyte at room temperature shows two different regions: a sloping region and a plateau region of 1.66 V. The first discharge capacity is 538 mAh g−1 sulfur and then decreases with repeated charge–discharge cycling to give 240 mAh g−1 after ten cycles. Elemental sulfur of the cathode changes to sodium polysulfides Na2S2 and Na2S3, during full discharge. The sodium polysulfides, however, do not reduce completely to elemental sulfur after full charging. In summary, the mechanism of the battery with liquid electrolyte is 2Na + nS → Na2Sn(4 > n ≥ 2) on discharge and Na2Sn(4 > n ≥ 2) → x(2Na + nS) + (1 − x)Na2Sn(5 > n > 2) on charge. Research highlights,A sodium/sulfur cell using Tetraethylene Glycol Dimethyl Ether (TEGDME) liquid electrolyte at room temperature has 538 mAh g−1 sulfur of the first discharge capacity and decreases to 240 mAh g−1 after ten cycles. The mechanism of the battery is 2Na + nS → Na2Sn(4 > n ≥ 2) at discharge and Na2Sn(4 > n ≥ 2) → x (2Na + nS) + (1 − x)Na2Sn(5 > n > 2) at charge.

The decrease in discharge capacity is due to a decrease in active material by dissolution of sulfur or sodium polysulfides into the electrolyte and the irreversible reduction from sodium sulfides to elemental sulfur at full charge.Research highlights, A sodium/sulfur cell using Tetraethylene Glycol Dimethyl Ether (TEGDME) liquid electrolyte at room temperature has 538 mAh g−1 sulfur of the first discharge capacity and decreases to 240 mAh g−1 after ten cycles. The mechanism of the battery is 2Na + nS → Na2Sn(4 > n ≥ 2) at discharge and Na2Sn(4 > n ≥ 2) → x (2Na + nS) + (1 − x)Na2Sn(5 > n > 2) at charge. The decrease in discharge capacity is due to a decrease in active material by dissolution of sulfur or sodium polysulfides into the electrolyte and the irreversible reduction from sodium sulfides to elemental sulfur at full charge. is 2Na + nS → Na2Sn(4 > n ≥ 2) on discharge and Na2Sn(4 > n ≥ 2) → x(2Na + nS) + (1 − x)Na2Sn(5 > n > 2) on charge. Research highlights; The first discharge capacity is 538 mAh g−1 sulfur and then decreases with repeated charge–discharge cycling to give 240 mAh g−1 after ten cycles. Elemental sulfur of the cathode changes to sodium polysulfides Na2S2 and Na2S3, during full discharge.

The sodium polysulfides, however, do not reduce completely to elemental sulfur after full charging. In summary, the mechanism of the battery with liquid electrolyte is 2Na + nS → Na2Sn(4 > n ≥ 2) on discharge and Na2Sn(4 > n ≥ 2) → x(2Na + nS) + (1 − x)Na2Sn(5 > n > 2) on charge. Research highlights are, A sodium/sulfur cell using Tetraethylene Glycol Dimethyl Ether (TEGDME) liquid electrolyte at room temperature has 538 mAh g−1 sulfur of the first discharge capacity and decreases to 240 mAh g−1 after ten cycles. The mechanism of the battery is 2Na + nS → Na2Sn(4 > n ≥ 2) at discharge and Na2Sn(4 > n ≥ 2) → x (2Na + nS) + (1 − x)Na2Sn(5 > n > 2) at charge. The decrease in discharge capacity is due to a decrease in active material by dissolution of sulfur or sodium polysulfides into the electrolyte and the irreversible reduction from sodium sulfides to elemental sulfur at full charge.

A room temperature Na/S battery using a β″ alumina solid electrolyte separator,Tetraethylene Glycol Dimethyl Ether electrolyte, and a S/C composite cathode; To realize a high-performance room temperature Na/S battery with an elemental sulfur cathode, it is important that sodium polysulfides stay within the cathode and that they have room enough to react freely. In this work, sodium polysulfides are confined to the cathode using a β″ alumina solid electrolyte separator and an optimal amount of Tetraethylene Glycol Dimethyl Ether (TEGDME) electrolyte. In addition, an activated carbon material, in the form of a sulfur/carbon (S/C) composite, with high surface area, porosity, and pore volume is employed in the cathode. The resulting Na/S battery shows a high first discharge capacity of 855 mAh g−1 and coulombic efficiency close to 100%, as well as stable cyclability, with a discharge capacity of 521 mAh g−1 at the 104th discharge. Sodium Polysulfides during Charge/Discharge of the Room-Temperature Na/S Battery Using Tetraethylene Glycol Dimethyl Ether Electrolyte ; The charge-discharge process of the room-temperature Na/S battery is studied using the Na/S cell with Tetraethylene Glycol Dimethyl Ether (TEGDME) and the solid electrolyte.

The solid electrolyte is a barrier for chemical mass transport between the anode and the cathode. The sodium polysulfides as reaction products in Tetraethylene Glycol Dimethyl Ether could therefore be investigated without interference from the anode side. During discharge, the color of the Tetraethylene Glycol Dimethyl Ether electrolyte changes from transparent to brown, yellowish-green, and then back to transparent, and in the reverse order during charge. The first three colors are well-matched with those of prepared Tetraethylene Glycol Dimethyl Ether solutions of Na2Sn (6 ≤ n ≤ 8), Na2S4 and Na2S, respectively. The solubility of sodium polysulfides (Na2Sn, 1 ≤ n ≤ 8) in Tetraethylene Glycol Dimethyl Ether are measured systematically. The dissolution of sodium polysulfides is found to depend on the molar concentration of sulfur. The optimized Na/S cell using activated carbon delivers a high capacity of 1070 mAh g−1 at the first discharge, and remains at 782 mAh g−1 after 37 cycles.

Tetraethylene Glycol Dimethyl Ether also shows good rate capability with a discharge capacity of 569 mAh g−1 at 1/2 C. The coulombic efficiency is nearly 100% after the 5th cycle. Viscosities of mixtures of 2-alkanols with Tetraethylene Glycol Dimethyl Ether at different temperatures; Kinematic viscosities and densities were measured over the entire range of composition and at atmospheric pressure for 2-propanol-Tetraethylene Glycol Dimethyl Ether, 2-butanol-Tetraethylene Glycol Dimethyl Ether, and 2-pentanol-Tetraethylene Glycol Dimethyl Ether from 288.15 to 318.15 K employing pure species and solutions covering the whole range expressed by the condition 0 ≤ x ≤ 1. Starting from the experimental data, the dynamic viscosity, deviation of dynamic viscosity, and the excess Gibbs energies of activation for viscous flow have been calculated. The results were fitted by the Redlich–Kister equation. Free-volume type correlation with one parameter is compared with an extension of the generalized corresponding states principle for these systems.

Densities and Viscosities of Binary Mixtures of Polyethylene Glycol 350 Monomethyl Ether with n-Butanol and n-Pentanol and Tetraethylene Glycol Dimethyl Ethers with n-Propanol, n-Butanol, and n-Pentanol from 278.15 K to 318.15 K; The density and viscosity of binary mixtures of polyethylene glycol 350 monomethyl ether with 1-butanol and 1-pentanol and Tetraethylene Glycol Dimethyl Ether with 1-propanol, 1-butanol, and 1-pentanol were measured at five different temperatures (278.15, 288.15, 298.15, 308.15, and 318.15 K) and at atmospheric pressure. The measurements were carried out over the whole range of composition. Viscosity values were used in the determination of the viscosity deviation, Δη, which was fitted to the Redlich−Kister equation and was compared with the predicted values obtained by the viscosity regular term. Measurement of the vapor pressure of 2,2,2-trifluoroethanol and Tetraethylene Glycol Dimethyl Ether by static method; New results of vapor pressure are presented for Tetraethylene Glycol Dimethyl Ether (TEGDME) and 2,2,2-trifluoroethanol (TFE) in the ranges of temperatures from 373.15 to 533.15 K, and 293.15 to 363.15 K, respectively.

Measurements were made using the static method. The static vapor pressure apparatus developed is described. For the practical utility, vapor pressure data for Tetraethylene Glycol Dimethyl Ether were fitted to Antoine equation and for TFE to a Wagner-type equation, combining in this case the experimental data with those of Sauermann et al. (1993) to cover a wide temperature range. Thermophysical Properties of 2,2,2-Trifluoroethanol + Tetraethylene Glycol Dimethyl Ether, Isothermal P,x data from 303.15 K to 423.15 K, liquid densities from 283.15 K to 423.15 K, and dynamic viscosities from 343.15 K to 393.15 K for the binary system 2,2,2-trifluoroethanol + Tetraethylene Glycol Dimethyl Ether were measured. The vapor−liquid equilibrium (VLE) data were measured using a static apparatus. VLE data were correlated by the five-parameter NRTL equation, while density and kinematic viscosity data were correlated with temperature and liquid composition using empirical equations. The viscosity data used in the correlation cover the range of 293.15−393.15 K. VLE data indicate that this binary system exhibits large negative deviations from Raoult's law. These mixtures present large exothermic excess molar enthalpies. The excess molar enthalpy calculated using the Gibbs−Helmholtz equation and the NRTL parameters was compared with experimental data existing in the literature. Binary vapour—liquid equilibria of methanol with sulfolane.

Tetraethylene Glycol Dimethyl Ether and 18-crown-6Phasengleichgewichte in binären systemen von Methanol mit Sulfolan, Tetraethylene Glycol Dimethyl Ether und 18-krone-6 Kronenether; The activity coefficients of methanol in sulfolane, Tetraethylene Glycol Dimethyl Ether (TEGDME) and 18-crown-6 under conditions of equilibrium have been determined in the temperature range 423–503 K and in the pressure range 0.28–3.5 MPa. A minimum in the activity coefficient was found for the methanol— Tetraethylene Glycol Dimethyl Ether and methanol—18-crown-6 solutions.. Hyo-Jun Ahn, Ki-Won Kim, Jou-Hyun Ahn, Kwon-Koo Cho, Tae-Hyun Nam, Jong-Uk Kim, Gyu-Bong Cho; Ho-Suk Ryu (2006). "Discharge behavior of lithium/sulfur cell with Tetraethylene Glycol Dimethyl Ether based electrolyte at low temperature". Journal of Power Sources (Review) (1): 201–206. doi:10.1016/j.jpowsour.2005.12.061. Karl Stephan; Andreas Genssle (2000). "Analysis of the process characteristics of an absorption heat transformer with compact heat exchangers and the mixture TFE–E181". (International Journal of Thermal Sciences ).

Tetraethylene Glycol Dimethyl Ether , Chemical formula: C10H22O5 ; Molar mass : 222.281 g•mol−1 ; Appearance: Colorless liquid ; Density: 1.009 g/mL[1] ; Melting poin: 275–276 °C (527–529 °F; 548–549 K)[1] ; Solubility in water: Miscible ; Thermochemistry: Std enthalpy of ; formation (ΔfH⦵298):1134.6 kJ/mol ; combustion (ΔcH⦵298): 6196.5 kJ/mol ;Flash point: 141 °C (286 °F; 414 K) ; Temperature: 200 °C (392 °F; 473 K) ; Lethal dose or concentration (LD, LC): LD50 (median dose);5,140 mg/kg (rat, oral) ;Categories: Glycol ethers. Eye/face protection, Face shield and safety glasses Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or. Tetraethylene Glycol Dimethyl Ether Skin protection : Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.

The selected protective gloves have to satisfy the specifications of Regulation (EU) 2016/425 and the standard EN 374 derived from it.Tetraethylene Glycol Dimethyl Ether full contact;Material: butyl-rubber ;Minimum layer thickness: 0,3 mm ; Break through time: 480 min,Material tested:Butoject® (KCL 897 / Aldrich Z677647, Size M) ; Splash contact ; Material: Nitrile rubber ; Minimum layer thickness: 0,4 mm ; Break through time: 240 min. If used in solution, or mixed with other substances, and under conditions which differ from EN 374, contact the supplier of the CE approved gloves. Tetraethylene Glycol Dimethyl Ether recommendation is advisory only and must be evaluated by an industrial hygienistand safety officer familiar with the specific situation of anticipated use by our customers. It should not be construed as offering an approval for any specific use scenario. Tetraethylene Glycol Dimethyl Ether Body Protection,Impervious clothing, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Tetraethylene Glycol Dimethyl Ether Product;Offer surplus and non-recyclable solutions to a licensed disposal company. Waste material must be disposed of in accordance with the Directive on waste 2008/98/EC as well as other national and local regulations. Leave chemicals in original containers. No mixing with other waste. Handle uncleaned containers like the product itself.

Tetraethylene Glycol Dimethyl Ether is a chemical compound from the group of glycol ethers . Tetraethylene Glycol Dimethyl Ether can be obtained by reacting ethanol with ethene oxide. Tetraethylene Glycol Dimethyl Ether is a flammable, hardly inflammable, hygroscopic, little volatile, colorless liquid with a faint odor that is miscible with water. Tetraethylene Glycol Dimethyl Ether decomposes when heated. Tetraethylene Glycol Dimethyl Ether is used as the solvent and coupling reagent. Tetraethylene Glycol Dimethyl Ether is also used in brake and hydraulic fluids.

Tetraethylene Glycol Dimethyl Ether used as raw material for hydraulic brake fluids; Also Tetraethylene Glycol Dimethyl Ether used in coatings, printing inks, specialty chemicals, cleaning products, cutting oils, deicing agents, antisudsing agent for finely powdered materials, and food contact plastics (plasticizer); 95% used to make hydraulic brake fluid. Ethoxytriglycol is a low-volatility, high solvency Tetraethylene Glycol Dimethyl Ether with excellent coupling properties. The versatility of ethoxytriglycol, Tetraethylene Glycol Dimethyl Ether is demonstrated by the variety of applications in which it may find use. Low volatility and excellent solvency make this Tetraethylene Glycol Dimethyl Ether a highly effective carrier solvent for textile dye processes. With superior surface tension characteristics, water solubility and solvency for oils, it has potential for use in household, institutional, industrial and special-purpose cleaners. The coupling ability of this product enhances performance and improves shelf stability of cleaning products. Tetraethylene Glycol Dimethyl Ether, is a solvent used widely in commercial and industrial applications. Tetraethylene Glycol Dimethyl Ether is a clear, colorless, nearly odorless liquid that is miscible with water, ethanol, diethyl ether, acetone, and ethyl acetate.

Tetraethylene Glycol Dimethyl Ether is manufactured by the reaction of ethylene oxide with ethanol. As with other glycol ethers Tetraethylene Glycol Dimethyl Ether l has the useful property of being able to dissolve chemically diverse compounds. Tetraethylene Glycol Dimethyl Ether will dissolve oils, resins, grease, waxes, nitrocellulose, and lacquers. This is an ideal property as a multi-purpose cleaner, and, therefore, Tetraethylene Glycol Dimethyl Ether is used in products such as varnish removers and degreasing solutions. Tetraethylene Glycol Dimethyl Ether is a solvent with many commercial and industrial applications. Tetraethylene Glycol Dimethyl Ether is found in multi-purpose cleaners such as varnish removers and degreasing solutions due to its ability to dissolve oils, resins, grease, waxes, nitrocellulose, and lacquer. Tetraethylene Glycol Dimethyl Ether is used as a diluent for color additive mixtures in the food industry and in the pharmaceutical industry for the production of colored capsules.

Tetraethylene Glycol Dimethyl Ether is a colorless, neutral, weakly hygroscopic and slightly mobile liquid with a mild pleasant odor. It is miscible in any ratio with water and the usual organic solvents e.g. acetone, diethyl ether, methanol. Methyl triglycol enters into the typical alcohol reactions. Tetraethylene Glycol Dimethyl Ether is used in brakefluid formulations und organic intermediates. Tetraethylene Glycol Dimethyl Ethers and their derivatives tend to form peroxides in the presence of air or oxygen. Due to the hygroscopicity Tetraethylene Glycol Dimethyl Ether storage to prevent absorption of water has to be ensured. Tetraethylene Glycol Dimethyl Ether is recommended to reduce moisture pickup by nitrogen blanketing of storage tanks. Storage tanks should be made from stainless steel. Alumina and other light metals are not suitable due to alcoholate formation with methyl triglycol. For further informations please refer to the safety data sheet.

Tetraethylene Glycol Dimethyl Ether is used in lithium-ion battery technology. It is associated with trifluoroethanol and used as a working pair for organic absorption heat pumps. It acts as a solvent for cleaning and degreasing due to its chemical and thermal stability. Moreover, it is suitable solvent for high temperature reactions due its high boiling point. Further, it is used in the selective adsorption of proteins during the promotion of cell adhesion. Tetraethylene Glycol Dimethyl Ether(tegdme or tetraglyme) is a polar aprotic solvent with excellent chemical and thermal stability. Tetraethylene Glycol Dimethyl Ether is high boiling point and stability makes it an ideal candidate for separation processes and high temperature reactions. Tetraethylene Glycol Dimethyl Ether is also used in lithium-ion battery technology and combined with trifluoroethanol as a working pair for organic absorption heat pumps. A colorless, odorless, viscous Tetraethylene Glycol Dimethyl Ether. Tetraethylene Glycol Dimethyl Ether has a sweet taste, but Tetraethylene Glycol Dimethyl Ether poisonous if ingested.

Tetraethylene Glycol Dimethyl Ether is the most important glycol commercially available and is manufactured on a large scale in the United States. Tetraethylene Glycol Dimethyl Ether is used as an antifreeze and coolant, in hydraulic fluids, and in the manufacture of low-freezing dynamites and resins. Tetraethylene Glycol Dimethyl Ether’s Formula : H(OCH2CH2)4OCH3 ; Formula Weight: 208.25; Boiling Point: 158-160°/5mm ; Density: 1.07 ; Refractive Index: 1.4450 ; Storage & Sensitivity Ambient temperatures.SolubilityWater solubility 999,999c.Tetraethylene Glycol Dimethyl Ether Applications are A very small fraction (less than 5%) may be used for other purposes, such as asphalt anti-stripping applications or as a chemical intermediate in other industrial processes. Tetraethylene Glycol Dimethyl Ether Store away from oxidizing agents. Keep the container tightly sealed and store in cool, dry condition in well ventilated place. Tetraethylene Glycol Dimethyl Ether Category is Glycol Ethers (E Series) ; Descriptionis Clear colorless liquid; [Acros Organics MSDS] . Tetraethylene Glycol Dimethyl Ether Sources/Uses ;Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used in the automobile industry in brake and hydraulic fluids, [IUCLID] Only available commercially in glycol ether mixtures; High boiling ethylene glycol ethers are mainly used in automotive hydraulic brake fluids. Tetraethylene Glycol Dimethyl Ether , Not a skin or eye irritant in rabbits; [IUCLID] Similar glycol ethers demonstrate low acute toxicity by oral, dermal, and inhalation exposure; Histopathological liver changes and testicular toxicity at high doses in sub-chronic oral studies of rats; [Reference #1] May cause irritation; [Acros Organics MSDS] See Tetraethylene Glycol Dimethyl Ether.

Tetraethylene Glycol Dimethyl Ether applicated in medical research, drug-release, nanotechnology and new materials research, cell culture. In the study of ligand, polypeptide synthesis support, a graft polymer compounds, new materials, and polyethylene glycol-modified functional coatings and other aspects of the active compound. Tetraethylene Glycol Dimethyl Ether(tegdme or tetraglyme) is a polar aprotic solvent with excellent chemical and thermal stability. Tetraethylene Glycol Dimethyl Ether is high boiling point and stability makes it an ideal candidate for separation processes and high temperature reactions. Tetraethylene Glycol Dimethyl Ether is also used in lithium-ion battery technology and combined with trifluoroethanol as a working pair for organic absorption heat pumps. We investigated self-discharge characteristics of Li/S batteries using Tetraethylene Glycol Dimethyl Ether (TEGDME) electrolyte. The open circuit voltages (OCV) and discharge curves were measured as a function of storage time. The self-discharge of the Li/S battery depended on current collectors. Li/ Tetraethylene Glycol Dimethyl Ether /S batteries with stainless steel (SUS) current collector showed the highest self-discharge rate of 59% per month. The self-discharge rate of Li/ Tetraethylene Glycol Dimethyl Ether /S battery using Al current collector is 34% during initial 80 days, but only 36% after 360 days storage.

The discharge capacity decreases only 2% from 80 to 360 days. The self-discharge of Li/S battery using Al current collector is severe during initial 80 days, but is not an important factor after 80 days. Average self-discharge rate of Li/ Tetraethylene Glycol Dimethyl Ether /S battery using Al current collector is 3% per month for 1 year. The low temperature behaviors of Li/TEGDME/S cell was examined using discharge curves, SEM and impedance spectra. The first discharge capacity of Li/S cell with Tetraethylene Glycol Dimethyl Ether (TEGDME) electrolyte was 1303 mAh g−1-sulfur at 20 °C, but 357 mAh g−1-sulfur at low temperature of −10 °C. The low temperature discharge characteristic is improved by adding 1,3-dioxolane (DOXL) and methylacetate (MA) to Tetraethylene Glycol Dimethyl Ether electrolyte. The optimum composition of mixed electrolyte is MA–DOXL– Tetraethylene Glycol Dimethyl Ether (5:47.5:47:5, v/v). The Li/S cell using the optimum electrolyte has the first discharge capacity of 994 and 1342 mAh g−1-S at −10 and 20 °C, respectively. The cycling performance of lithium–sulfur batteries in binary electrolytes based on Tetraethylene Glycol Dimethyl Ether (TEGDME) and 1,3-dioxolane(DOL) with lithium nitrate (LiNO3) additive were investigated. The highest ionic conductivity was obtained for 1 M LiN(CF3SO2)2 (LiTFSI) in Tetraethylene Glycol Dimethyl Ether /DOL = 33:67(volume ratio)-based electrolyte.

The cyclic efficiency of lithium–sulfur batteries was dramatically increased with LiNO3 additive as a shuttle inhibitor in electrolytes. The lithium–sulfur cell assembled with 1 M LiTFSI in Tetraethylene Glycol Dimethyl Ether /DOL containing 0.2 M LiNO3 additive for electrolyte, the elemental sulfur for cathode, and the lithium metal for anode demonstrated the initial discharge capacity of about 900 mAh g−1 and an enhanced cycling performance. The organic working pairs trifluoroethanol (TFE)–Tetraethylene Glycol Dimethyl Ether(TEGDME or E181) and methanol–TEGDME have some advantages over classical water–LiBr and ammonia water working pairs in absorption cycles. One of the most important features is the wide working range caused by the absence of crystallization, the low freezing temperatures of the refrigerants and the thermal stability of the mixtures at high temperatures. The performance of a double effect absorption cycle for these organic mixtures can be improved if a compression stage is introduced between the evaporator and the absorber. The coefficient of performance (COP) and primary energy ratio (PER) values in the cooling mode are significantly increased over a wide working range: the cycle can work with temperature lifts of 50ºC at 5ºC in the evaporator or Tetraethylene Glycol Dimethyl Ether can also be powered by low grade heat. For these conditions COP and PER values are higher than 1.0 and 0.7 respectively, and the power supplied to the compressor represents up to 15% of the thermal energy supplied to the generator. As Tetraethylene Glycol Dimethyl Ether is possible to work at high temperatures lifts, the absorber and condenser can be air cooled.