• Sulfur hexafluoride - Wikipedia

    The density of sulfur hexafluoride is relatively high at room temperature and pressure due to the gaslarge molar mass. Unlike helium, which has a molar mass of about 4 g/mol and pitches the voice up, SF 6 has a molar mass of about 146 g/mol, and the speed of sound through the gas is about 134 m/s at room temperature, pitching the voice down.

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  • Sulfur hexafluoride | F6S - PubChem

    IDENTIFICATION: Sulfur hexafluoride is a colorless, odorless and tasteless gas. It can also be a liquid at extremely low temperatures. It is moderately soluble in water. It is a Greenhouse Gas which contributes to climate change. Sulfur hexafluoride is more effective at trapping heat than carbon dioxide. The Global Warming Potential of sulfur hexafluoride is quite high (25,000; the Global Warming Potential of CO2 is 1) and amongst the highest of all chemicals.

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  • Mechanistic and Kinetic Investigations on the Thermal

    Sep 27, 2018 · Author information: (1)College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , 430072 , PeopleRepublic of China. Heptafluoroisobutyronitrile (C4) has been utilized as a dielectric compound to replace sulfur hexafluoride for the sake of environmental concern.

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  • sf 6 - Sulfur Hexafluoride Structure, Molecular Mass

    Sulfur hexafluoride is one of the most stable gases known. Sulfur hexafluoride is a very dense gas so it will mainly reside in the lowest layers of air. Exposure will be primarily occupational. Sulfur hexafluoride is a weaker eluent than carbon dioxide and difficult to obtain in adequate purity.

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  • Coronavirus: Image showing sulphur dioxide forecasts falsely

    On February 9, Twitter account @inteldotwav posted (archive link) the same image from Windy and said that massive release of sulfur dioxide (SO2) gas from the outskirts of Wuhan is commonly associated with the burning of organic matters. Since then it has been retweeted over 12,000 times.

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  • USGS Groundwater Dating Lab

    Sulfur hexafluoride is primarily of anthropogenic origin but also occurs naturally in minerals, rocks, and volcanic and igneous fluids. Concentrations of SF 6 in air have rapidly increased from a steady state value of about 0.02-0.05 to over 7 parts per trillion during the past 40 years, and are expected to continue increasing.

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  • Is the end coming for sulfur hexafluoride, the most powerful

    Oct 15, 2020 · Less visible but just as important are switchgear devices that protect electrical equipment. But did you know that many of these devices—widely used in electric-utility transmission and distribution systems as well as commercial and industrial facilities—integrate the most powerful greenhouse gas, sulfur hexafluoride (SF 6)? Luckily

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  • Sulfur hexafluoride: The truths and myths of this greenhouse gas

    Jan 15, 2020 · Sulfur hexafluoride, commonly known as SF 6, has made a splash in the mainstream media of late.Several articles are pointing the finger at the growth in renewables—specifically wind turbines

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  • Sulphur hexafluoride gaz sf6 – Detectors Protection Equipment

    Get information about Sulphur hexafluoride sf6 gas and fitting detectors and PPE. testing, monitoring protective equipment 1500+ substances database

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  • Sulphur dioxide images do NOT show mass cremations in Wuhan

    Sulphur dioxide readings in Wuhan were never higher than 11.5 µg/m3 in the week up to February 9, the centre said. The Czech-based websitedata for Beijing and other cities also 'deviated

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  • Sulfur hexafluoride - NIST

    Phase Change DataReferencesNotesGo To: Top, References, Notes Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved. Data compiled as indicated in comments: BS - Robert L. Brown and Stephen E. Stein TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director AC- William E. Acree, Jr., James S. Chickos

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  • Sulfur hexafluoride - NIST

    Matzik, I.; Schneider, G.M., Fluid phase equilibria of binary mixtures of sulfur hexafluoride with octane, nonane, hendecane, and cis-decahydronaphthalene at temperature between 280 K and 440 K and at pressures up to 140 MPa, Ber.

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  • Theoretical Investigations on the Oxidation of Heptafluoro

    Heptafluoro-iso-butyronitrile [(CF3)2CFCN, in abbr., C4] with CO2 gas mixture is a promising dielectric candidate to replace sulfur hexafluoride (Sulfr hexafluoride) for the sake of environmental concern. Detailed mechanisms for the reactions of C4 with atomic oxygen in both triplet and singlet due to dissociation of CO2 were proposed using high-level ab initio methods including density functional theory

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  • Ultraviolet Spectral Analysis and Quantitative Detection of

    As an alternative to sulfur hexafluoride (SF 6 ) with great potential for application, heptafluoroisobutyronitrile-carbon dioxide (C 4 F 7 N-CO<sub2</sub) gas mixture has been applied in various gas-insulated equipment.

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  • Disulfur decafluoride - Wikipedia

    like sulfur dioxide: Density: 2.08 g/cm 3: Melting point −53 °C (−63 °F; 220 K) Boiling point: 30.1691 °C (86.3044 °F; 303.3191 K)

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  • Tungsten hexafluoride - Wikipedia

    At 2.3 °C it freezes into a white solid having a cubic crystalline structure, the lattice constant of 628 pm and calculated density 3.99 g/cm3. At −9 °C this structure transforms into an orthorhombic solid with the lattice constants of a = 960.3 pm, b = 871.3 pm, and c = 504.4 pm, and the density of 4.56 g/cm3.

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  • ESRL Global Monitoring Laboratory - FTP Navigator

    Apr 10, 2021 · Sulfur Hexafluoride (SF 6) Flask: Monthly Averages: Multiple: Download: Readme: 5: Argyle, Maine, United States (AMT) Air samples collected in glass flasks. Greenhouse Gases: Sulfur Hexafluoride (SF 6) Flask: Discrete: Multiple: Download: Readme: 6: Anmyeon-do, Republic of Korea (AMY) Air samples collected in glass flasks. Greenhouse Gases

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  • SULFUR HEXAFLUORIDE | CAMEO Chemicals | NOAA

    Vapor Density (Relative to Air): data unavailable. Sulfur hexafluoride (2551-62-4) 3000 ppm : 33000 ppm : 200000 ppm (DOE, 2016) Regulatory Information.

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  • Stress Test of Contrast-Enhanced US with Phenylephrine in a

    1. J Vasc Interv Radiol. 2016 Jul;27(7):1077-1085.e2. doi: 10.1016/j.jvir.2016.02.012. Epub 2016 Apr 23. Stress Test of Contrast-Enhanced US with Phenylephrine in a Rabbit VX2 Liver Tumor Model: Differentiating Benign Periablational Enhancement from Residual Tumor after Radiofrequency Ablation.

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  • Toxic substances list: sulphur hexafluoride - Canada.ca

    Sulphur hexafluoride (SF 6) is a synthetic (i.e., human-made) gas that is colourless, odorless, non-toxic (except when exposed to extreme temperatures), and non-flammable. It is heavier than air and hence stays close to the ground upon release which can cause death by suffocation if large quantities are involved.

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  • SULFUR HEXAFLUORIDE by portable GC 6602

    SULFUR HEXAFLUORIDE by portable GC: METHOD 5512, Issue 2, dated 15 August 1994 - Page 2 of 4 SAMPLING AND MEASUREMENT: REAGENTS: 1. Sulfur hexafluoride in air at known concentration(s) for use in field calibration. Prepared in the field by filling sample bag (see "Equipment") with verified commercial standard compressed gas*, or by injecting

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  • sf6 gas Emission Reduction Partnership for Electric Power Systems

    perfluorocarbons (PFCs)). Sulfur hexafluoride (SF. 6) is a man-made fluorinated compound with a long atmo-spheric lifetime of 3,200 years and has the ability to trap heat in the Earth’s atmosphere 23,900 times more than that of carbon dioxide (CO. 2). U.S. electric utilities that participate in this program (SF. 6. Partners) have recog-

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  • Stress Test of Contrast-Enhanced US with Phenylephrine in a

    1 Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 JieFang Rd., Wuhan, Hubei 430022, China. 2 Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 JieFang Rd., Wuhan, Hubei 430022, China.

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  • CDC - NIOSH Pocket Guide to Chemical Hazards - Sulfur

    Sulfur fluoride [Note: May contain highly toxic sulfur pentafluoride as an impurity.] Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Condenses directly to a solid upon cooling.]

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  • SULFUR HEXAFLUORIDE HAZARD SUMMARY Sulfur Hexafluoride

    Common Name: SULFUR HEXAFLUORIDE CAS Number: 2551-62-4 DOT Number: UN 1080 ----- HAZARD SUMMARY * Sulfur Hexafluoride can affect you when breathed in. * Sulfur Hexafluoride can irritate the skin causing a rash or burning feeling on contact. Direct skin contact can cause frostbite. * Sulfur Hexafluoride may cause severe eye burns leading to

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  • Regulation for Reducing Sulfur Hexafluoride Emissions from

    Sulfur Hexaflouride (SF 6) Sulfur hexafluoride (SF 6) is a potent greenhouse gas 23,900 times the global warming potential of carbon dioxide (CO 2) One pound of SF 6 emitted is equivalent to 11 tonnes of CO 2 80% of California’s SF 6 emissions come from gas insulated electrical switchgear

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  • Thermodynamic Properties of Sulfur Hexafluoride | NIST

    May 01, 2000 · We present new vapor phase speed-of-sound data u(P,T), new Burnett density-pressure-temperature data ρ(P,T), and a few vapor pressure measurements for sulfur hexafluoride (SF 6). The speed-of-sound data spanned the temperature range 230 K {less than or equal to} T {less than or equal to} 460 K and reached maximum pressures that were the lesser

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  • sulfur hexafluoride -- Critically Evaluated Thermophysical

    sulfur hexafluoride: Formula: F 6 S: Density (Gas) as a function of Temperature and Pressure Temperature from 223.555 K to 625 K Pressure from 0.1 kPa to 3755 kPa

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