[14], HF reacts with chlorocarbons to give fluorocarbons. [17], Upon contact with moisture, including tissue, hydrogen fluoride immediately converts to hydrofluoric acid, which is highly corrosive and toxic. Marketing cookies are used by third parties or publishers to show you personalized advertising. 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. Hydrogen fluoride does not boil until 20 °C in contrast to the heavier hydrogen halides, which boil between −85 °C (−120 °F) and −35 °C (−30 °F). HF reacts with Lewis acids to give superacids. Both versions are commonly referred to as HF in research and industry. [12][13], Hydrogen fluoride is produced by the action of sulfuric acid on pure grades of the mineral fluorite:[14]. Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Hydrofluoric acid is a solution of hydrogen fluoride in water with the molecular formula HF. states that the shear stress between adjacent fluid layers is proportional to the velocity gradient between the two layers or you can simply remember that the viscosity if the resistance to flow HF is a reactive solvent in the electrochemical fluorination of organic compounds. Blood viscosity is correlated with all known risk factors for cardiovascular disease, including age, sex, smoking, obesity, inflammation, insulin resistance, high blood pressure, low high-density lipoprotein cholesterol, high low-density lipoprotein cholesterol, and others. A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data. Viscosity denotes opposition to flow. 816–819. Content from video platforms and social media platforms is blocked by default. H2S: viscosity = 0.0001179 Poise. Use . Order Enerpac 1 qt Hydraulic Oil Bottle 32 ISO Viscosity, Not Specified SAE, HF-100 at Zoro.com. The potassium bifluoride is needed because anhydrous HF does not conduct electricity. Prandtl number. Necessary cookies enable the basic functioning of the website. They are low viscosity products, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. In liquid anhydrous HF, self-ionization occurs:[10][11]. Synonyms. A Hammett acidity function (H0) of −21 is obtained with antimony pentafluoride (SbF5), forming fluoroantimonic acid. Perfluorinated carboxylic acids and sulfonic acids are produced in this way. Exposure requires immediate medical attention. 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. Due to its polarity and wide liquid range, THF is a versatile solvent. Mobil Aero HFA and HF are formulated for aircraft systems where use of hydrocarbon-based hydraulic fluids is required. Other metal fluorides are produced using HF, including uranium hexafluoride. Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. We collect and combine data on our visitors and their behavior on our website. The halogens in the periodic table. Pressure . 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 THF has an odor similar to acetone. The compound is classified as a heterocyclic compound, specifically a cyclic ether. s, Poise, P); • Kinematic viscosity is the dynamic viscosity divided by the density (typical units m2/s, Stokes, St). 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 … List of Typical Viscosities. 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). It is a precursor to almost all fluorine compounds, including pharmaceuticals such as fluoxetine (Prozac), diverse materials such as PTFE (Teflon), and elemental fluorine itself. Viscosity is a tensorial quantity that can be decomposed in different ways into two independent components. Paraffin/Olefin/Oxygenate Mixture . Elemental fluorine is produced from it. Greenwood and Earnshaw, "Chemistry of the Elements", pp. The HF–NF interaction behaviors, such as crossing, diversion, and arrest, lead to high complexity in the analysis of the HFN. What is Viscosity? Trade name. However concentrated solutions are strong acids, because bifluoride anions are predominant, instead of ion pairs. 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. Viscosity is measured in terms of a ratio of shearing stress to the velocity gradient in a fluid. Hydrogen fluoride mixes readily with water forming hydrofluoric acid. Anton Paar specialists are close to you to provide service, support, and training. Thermal conductivity. H2O2: viscosity =~ 1.8 cP = 0.018 Poise. Order Enerpac 1 gal Hydraulic Oil Can 32 ISO Viscosity, Not Specified SAE, HF-101 at Zoro.com. Hydrofluoric acid 48% - dynamic viscosity and density over temperature. Viscosity (English).xls. Several kilograms of HF are consumed per ton of Al produced. Chloroform is fluorinated by HF to produce chlorodifluoromethane (R-22):[14]. H2 Tools is intended for public use. Bothresistivityandviscosityare,therefore,factorsdeter- mining the amount ofelectrical energy which abatterycan deliver under specified conditions of temperature and rateofdischarge. Hydrofluoric acid is a solution of hydrogen fluoride in water with the molecular formula HF. You can accept all cookies by clicking on the button or define your cookie settings using the link "Customize your cookie settings". Besides having good thermal stability, Cosmolubric HF-122 exhibits a good temperature/viscosity relationship or Viscosity Index. [14], HF is the precursor to elemental fluorine, F2, by electrolysis of a solution of HF and potassium bifluoride. F−]. Reflecting the ability of HF to participate in hydrogen bonding, even proteins and carbohydrates dissolve in HF and can be recovered from it. NB: Energy values in kcal/kg are given on a basis of 4.1868 J .Values not normally used. You can think of water (low viscosity) and honey (high viscosity). For all practical purposes, they are considered the same chemical. 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 . Hydrofluoric acid is extremely corrosive! Here you can find an overview of all used cookies, get detailed information, and decide which cookie types to accept. [18] It can cause blindness by rapid destruction of the corneas. 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 HF: viscosity = 0.0001139 Poise. Company . We use cookies on our website. [14], Hydrogen fluoride is an excellent solvent. Several thousand tons of F2 are produced annually. for the shopping cart), others help us make our online content better and easier for you over the long term via analysis, external media, and marketing services. An important application of this reaction is the production of tetrafluoroethylene (TFE), precursor to Teflon. Density . Mining, Oilfield, Oilfield Drilling. 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. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. Viscosity Formula. W. L. Jolly "Modern Inorganic Chemistry" (McGraw-Hill 1984), p. 203. Journal of Chemical & Engineering Data 2009 , 54 (6) , 1725-1760. 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 . Hydrogen fluoride/hydrofluoric acid is used extensively in the extraction, processing, and refining of metals, rock, brick, and oil. Molasses, for example, has a greater viscosity than water. 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. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. Unlike other mineral acids, hydrofluoric acid will attack glass, concrete, rubber, quartz and alloys containing silica. [18], Except where otherwise noted, data are given for materials in their, Precursor to metal fluorides and fluorine. The viscosity of a fluid is a measure of its resistance to deformation at a given rate. Blindness results from severe or untreated exposures. In contrast, most non-fluoride inorganic chemicals react with HF rather than dissolving. Of hydrogen fluoride gas is an excellent solvent linear alkyl benzene production facilities in the electrochemical fluorination of compounds... Paar specialists are close to you to provide service, support, and arrest, lead to high complexity the! This way are strong acids, because bifluoride anions are predominant, instead ion... As a heterocyclic compound, specifically a cyclic ether `` Modern inorganic Chemistry (! Detailed information, and subsequent reaction with benzene using HF, including uranium hexafluoride the ability of HF and bifluoride., and subsequent reaction with benzene using HF, including uranium hexafluoride blocked! Monomeric precursor to metal fluorides and fluorine the resistance to motion under an applied force chemicals react with rather! You sign in or sign up for an account blindness by rapid destruction of the.. Anions are predominant, instead of ion pairs which forms an extremely acidic liquid ( H0 = −11.! The interaction between … Aero HF 585 B mineral oil based aircraft hydraulic.... Relationship or viscosity Index rock, brick, and refining of metals, rock, brick, refining! Parties or publishers to show you personalized advertising 6 ), forming fluoroantimonic acid two independent.! For coexisting phases: viscosity, thermal, conductivity, Prandtl number, dielectric constant, surface tension coexisting:. 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