Last edited on 10 December 2020, at 06:18, National Institute for Occupational Safety and Health, Ullmann's Encyclopedia of Industrial Chemistry, Facts About Hydrogen Fluoride (Hydrofluoric Acid), CDC - NIOSH Pocket Guide to Chemical Hazards, https://en.wikipedia.org/w/index.php?title=Hydrogen_fluoride&oldid=993366157, Creative Commons Attribution-ShareAlike License, colourless gas or colourless liquid (below 19.5 °C), Boiling points of the hydrogen halides (blue) and, This page was last edited on 10 December 2020, at 06:18. Necessary cookies enable the basic functioning of the website. Absolute or dynamic viscosity is used to calculate Reynold's Number to determine if a fluid flow is laminar, transient or turbulent.. Online Water Viscosity Calculator Elemental fluorine is produced from it. The HF–NF interaction behaviors, such as crossing, diversion, and arrest, lead to high complexity in the analysis of the HFN. THF has an odor similar to acetone. Temperature. The electrowinning of aluminium relies on the electrolysis of aluminium fluoride in molten cryolite. Order Enerpac 1 gal Hydraulic Oil Can 32 ISO Viscosity, Not Specified SAE, HF-101 at Zoro.com. Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. The in situ stress dominates the HF propagation pathway on a large scale, whereas the treatment parameters (fluid viscosity/injection rate) and the NFs can alter the HF … The result is typically expressed in centipoise (cP), which is the equivalent of 1 mPa s (millipascal second). Molasses, for example, has a greater viscosity than water. Example: Syrup has a higher viscosity than water. A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data. CS1 maint: multiple names: authors list (. Thermal conductivity. High viscosity index results in minimum variation of viscosity with change in temperature; Effective protection against corrosion of metal surfaces; Certifications and Specifications - NSF H1 - NSF ISO 21469 - Kosher - Halal - DIN 51524 HLP - DIN 51524 HVLP (ohne HF 15) - DIN 51517 CLP (HF 68, HF … Klucel™ HF Pharma is a high molecular weight (1,150,000) pharmaceutical grade of hydroxypropylcellulose with a viscosity range of 1,500-3,000 cps. Some of them are necessary (e.g. Pressure . Hydrofluoric acid is extremely corrosive! What is Viscosity? It is an … It was built, and is maintained, by the Pacific Northwest National Laboratory with funding from the DOE Office of Energy Efficiency and Renewable Energy's Hydrogen and Fuel Cell Technologies Office. [14], HF is the precursor to elemental fluorine, F2, by electrolysis of a solution of HF and potassium bifluoride. We collect and combine data on our visitors and their behavior on our website. An important application of this reaction is the production of tetrafluoroethylene (TFE), precursor to Teflon. Chloroform is fluorinated by HF to produce chlorodifluoromethane (R-22):[14]. which forms an extremely acidic liquid (H0 = −11). Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more ; Viscosity - Documents giving viscosity of different kind of chemical species at varying conditions; Related Documents . Exposure requires immediate medical attention. Typical Properties of SYLTHERM HF Fluid1 Composition: Dimethyl Polysiloxane Color: Crystal Clear Liquid Property SI Units English Units Viscosity @ 25°C (77°F) 1.70mPa.s 1.70cp Flash Point2,Closed Cup, Typical 63°C 145°F Flash Point3, Open Cup, Typical 76.7°C 170°F Autoignition Point, ASTM D-2155 355°C 671°F Freeze Point <-82°C <-115°F Perfluorinated carboxylic acids and sulfonic acids are produced in this way. [18] It can cause blindness by rapid destruction of the corneas. s) Notes Ref. It is mainly used as a precursor to polymers. Viscosity of iced coffees was adjusted by addition of maltodextrin, and viscosity of HV-LF was 2.5 times higher than that of LV-HF and LV-LF (10 vs. 4 mPa s at 100 s −1). Friction coefficients of LV-LF were reduced by addition of polyethylene glycol (PEG, M w 6000), and were up to 25% lower than those of LV-HF. Table 7. Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. The order of Boiling point is like this: HF > HI > HBr > HCl But the important thing to know is not the order itself but why that order happened. Greenwood and Earnshaw, "Chemistry of the Elements", pp. Table 6. HF: viscosity = 0.0001139 Poise. It is a colorless, water-miscible organic liquid with low viscosity. Several thousand tons of F2 are produced annually. Content from video platforms and social media platforms is blocked by default. A Hammett acidity function (H0) of −21 is obtained with antimony pentafluoride (SbF5), forming fluoroantimonic acid. Here you can find an overview of all used cookies, get detailed information, and decide which cookie types to accept. Mineral oil based low viscosity hydraulic fluid intended for use in hydraulic systems where rapid system … Breathing in hydrogen fluoride at high levels or in combination with skin contact can cause death from an irregular heartbeat or from fluid buildup in the lungs. In this approach, HF is oxidized in the presence of a hydrocarbon and the fluorine replaces C–H bonds with C–F bonds. They are low viscosity products, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. Besides having good thermal stability, Cosmolubric HF-122 exhibits a good temperature/viscosity relationship or Viscosity Index. About 20% of manufactured HF is a byproduct of fertilizer production, which generates hexafluorosilicic acid. This acid can be degraded to release HF thermally and by hydrolysis: In general, the anhydrous compound hydrogen fluoride is more common industrially than its aqueous solution, hydrofluoric acid. Paraffin/Olefin/Oxygenate Mixture . Prandtl number. Other metal fluorides are produced using HF, including uranium hexafluoride. Mobil Aero HFA and HF are formulated for aircraft systems where use of hydrocarbon-based hydraulic fluids is required. H2O2: viscosity =~ 1.8 cP = 0.018 Poise. This information is used to improve the website. The formula for measuring viscosity is fairly simple: viscosity = shear stress / shear rate. Aqueous solutions dilute as 0.1 M will pH at approximately 1.0. Hydrogen fluoride/hydrofluoric acid is used extensively in the extraction, processing, and refining of metals, rock, brick, and oil. In liquid anhydrous HF, self-ionization occurs:[10][11]. NB: Energy values in kcal/kg are given on a basis of 4.1868 J .Values not normally used. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.. For further definitions, go to Absolute (dynamic) and kinematic viscosity. Journal of Chemical & Engineering Data 2009 , 54 (6) , 1725-1760. Table 8. In contrast, most non-fluoride inorganic chemicals react with HF rather than dissolving. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. Its well-known ability to dissolve glass has already been known since the 17th century. Viscosity denotes opposition to flow. HF-1000 Solvent Revision Date 07/21/2020 Version 4.0 Print Date 07/21/2020 110000002927 Page 1 of 10 SAFETY DATA SHEET SECTION 1 IDENTIFICATION OF THE SUBSTANCE/MIXTURE AND OF THE COMPANY/UNDERTAKING . Viscosity is the measure of a substance's resistance to motion under an applied force. However concentrated solutions are strong acids, because bifluoride anions are predominant, instead of ion pairs. Its main uses, on a tonnage basis, are as a precursor to organofluorine compounds and a precursor to cryolite for the electrolysis of aluminium. It is a colorless solution that is highly corrosive, capable of dissolving many materials, especially oxides. [12][13], Hydrogen fluoride is produced by the action of sulfuric acid on pure grades of the mineral fluorite:[14]. Hydrogen fluoride mixes readily with water forming hydrofluoric acid. Carbon tetrafluoride: CF 4: 17.32 Fluoromethane: CH 3 F 11.79 Difluoromethane: CH 2 F 2: 12.36 Fluoroform: CHF 3: 14.62 Pentafluoroethane: C 2 HF 5: 12.94 Hexafluoroethane: C 2 F 6: 14.00 Octafluoropropane: C 3 F 8: 12.44 For example, in oil refineries "alkylate", a component of high-octane petrol (gasoline), is generated in alkylation units, which combine C3 and C4 olefins and iso-butane. The intermediate in this process is vinyl fluoride or fluoroethylene, the monomeric precursor to polyvinyl fluoride. HF is a reactive solvent in the electrochemical fluorination of organic compounds. [16], HF serves as a catalyst in alkylation processes in refineries. Unlike other mineral acids, hydrofluoric acid will attack glass, concrete, rubber, quartz and alloys containing silica. s, Poise, P); • Kinematic viscosity is the dynamic viscosity divided by the density (typical units m2/s, Stokes, St). Order Enerpac 1 qt Hydraulic Oil Bottle 32 ISO Viscosity, Not Specified SAE, HF-100 at Zoro.com. At a molecular level, viscosity is a result the interaction between … [14], HF reacts with chlorocarbons to give fluorocarbons. This hydrogen bonding between HF molecules gives rise to high viscosity in the liquid phase and lower than expected pressure in the … The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. Viscosity. HF-1000 Solvent . W. L. Jolly "Modern Inorganic Chemistry" (McGraw-Hill 1984), p. 203. 816–819. Marketing cookies are used by third parties or publishers to show you personalized advertising. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. Several kilograms of HF are consumed per ton of Al produced. We use cookies on our website. Reflecting the ability of HF to participate in hydrogen bonding, even proteins and carbohydrates dissolve in HF and can be recovered from it. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. Viscosity (SI).xls. You can think of water (low viscosity) and honey (high viscosity). HF reacts with Lewis acids to give superacids. You can accept all cookies by clicking on the button or define your cookie settings using the link "Customize your cookie settings". Let's go to the basics; the periodic table. 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Fluorinated by HF to acetylene using mercury as a precursor to elemental fluorine F2! Concrete, rubber, quartz and alloys containing silica the basics ; the periodic table the eyes is by... Alloys containing silica of flow antimony pentafluoride ( SbF5 ), p. 203 rapid destruction the. Dielectric constant, surface tension is exposed interaction behaviors, such as crossing,,! You personalized advertising be recovered from it from it prices & free shipping on over...

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