It is an … Hydrofluoric acid is a solution of hydrogen fluoride in water with the molecular formula HF. Molasses, for example, has a greater viscosity than water. [14], Hydrogen fluoride is an excellent solvent. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. 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. [18], Except where otherwise noted, data are given for materials in their, Precursor to metal fluorides and fluorine. F−]. Synonyms. Saturation vapor pressure . You can accept all cookies by clicking on the button or define your cookie settings using the link "Customize your cookie settings". The result is typically expressed in centipoise (cP), which is the equivalent of 1 mPa s (millipascal second). Here you can find an overview of all used cookies, get detailed information, and decide which cookie types to accept. [14], HF reacts with chlorocarbons to give fluorocarbons. 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 process involves dehydrogenation of n-paraffins to olefins, and subsequent reaction with benzene using HF as catalyst. HF-1000 Solvent . Company . Anton Paar specialists are close to you to provide service, support, and training. However concentrated solutions are strong acids, because bifluoride anions are predominant, instead of ion pairs. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. However, this definition can be confusing when we are looking at fluids with different densities. Paraffin/Olefin/Oxygenate Mixture . CS1 maint: multiple names: authors list (. 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). Several thousand tons of F2 are produced annually. Related Topics . Other metal fluorides are produced using HF, including uranium hexafluoride. If you accept cookies from external media, accessing these contents no longer requires giving manual consent. Reflecting the ability of HF to participate in hydrogen bonding, even proteins and carbohydrates dissolve in HF and can be recovered from it. Order Enerpac 1 qt Hydraulic Oil Bottle 32 ISO Viscosity, Not Specified SAE, HF-100 at Zoro.com. Table 6. The compound is classified as a heterocyclic compound, specifically a cyclic ether. In liquid anhydrous HF, self-ionization occurs:[10][11]. which forms an extremely acidic liquid (H0 = −11). NB: Energy values in kcal/kg are given on a basis of 4.1868 J .Values not normally used. 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 . 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. Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. 2) Eye Contact HF contact with the eye can cause eye burns and destruction of the cornea. 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. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. The viscosity of a fluid characterizes the resistance to the movement of the fluid. The HF–NF interaction behaviors, such as crossing, diversion, and arrest, lead to high complexity in the analysis of the HFN. Viscosity (SI).xls. Manage your online orders and purchase settings, Get full access to download all documents, Pharmaceutical instrument qualification service, Hydrofluoric acid, hydrogen fluoride, poison, acid. About 20% of manufactured HF is a byproduct of fertilizer production, which generates hexafluorosilicic acid. The electrowinning of aluminium relies on the electrolysis of aluminium fluoride in molten cryolite. 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. Necessary cookies enable the basic functioning of the website. Viscosity (English).xls. List of Typical Viscosities. HF: viscosity = 0.0001139 Poise. 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. THF has an odor similar to acetone. This information is used to improve the website. HF is a reactive solvent in the electrochemical fluorination of organic compounds. Table 9. Prandtl number. What is Viscosity? 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. [16], HF serves as a catalyst in alkylation processes in refineries. Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. 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 Both versions are commonly referred to as HF in research and industry. Viscosity Formula. A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data. Viscosity is a tensorial quantity that can be decomposed in different ways into two independent components. H2 Tools is intended for public use. Pyrolysis of chlorodifluoromethane (at 550-750 °C) yields TFE. It is a colorless solution that is highly corrosive, capable of dissolving many materials, especially oxides. Have you ever called a pump company to pump cake icing or tomato paste or latex and they ask you “what is the viscosity?” and you say “I don’t know…”. [15], 1,1-Difluoroethane is produced by adding HF to acetylene using mercury as a catalyst.[15]. Marketing cookies are used by third parties or publishers to show you personalized advertising. H2S: viscosity = 0.0001179 Poise. 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. Some of them are necessary (e.g. We use cookies on our website. In contrast, most non-fluoride inorganic chemicals react with HF rather than dissolving. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. Let's go to the basics; the periodic table. They do this by tracking which websites visitors go to. Greenwood and Earnshaw, "Chemistry of the Elements", pp. Due to its polarity and wide liquid range, THF is a versatile solvent. Viscosity is measured in terms of a ratio of shearing stress to the velocity gradient in a fluid. The viscosity of a fluid is a measure of its resistance to deformation at a given rate. Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water.Solutions of HF are colourless, acidic and highly corrosive.It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon). [17], Upon contact with moisture, including tissue, hydrogen fluoride immediately converts to hydrofluoric acid, which is highly corrosive and toxic. 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 … At a molecular level, viscosity is a result the interaction between … Temperature. The formula for measuring viscosity is fairly simple: viscosity = shear stress / shear rate. 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. Trade name. Viscosity denotes opposition to flow. Chloroform is fluorinated by HF to produce chlorodifluoromethane (R-22):[14]. Thermal expansion coefficient β = (1/ν)(∂ν/∂T) p of liquid water as a … HF reacts with Lewis acids to give superacids. [14], HF is the precursor to elemental fluorine, F2, by electrolysis of a solution of HF and potassium bifluoride. 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 [18] It can cause blindness by rapid destruction of the corneas. 816–819. For all practical purposes, they are considered the same chemical. 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 Hydrofluoric acid is a solution of hydrogen fluoride in water with the molecular formula HF. Elemental fluorine is produced from it. Mining, Oilfield, Oilfield Drilling. Viscosity is the measure of a substance's resistance to motion under an applied force. The potassium bifluoride is needed because anhydrous HF does not conduct electricity. 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. They are low viscosity products, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. 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. Table 8. 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, water-miscible organic liquid with low viscosity. 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). Journal of Chemical & Engineering Data 2009 , 54 (6) , 1725-1760. Its well-known ability to dissolve glass has already been known since the 17th century. Perfluorinated carboxylic acids and sulfonic acids are produced in this way. Blindness results from severe or untreated exposures. Pressure . Viscosity of often referred to as the thickness of a fluid. Hydrogen fluoride mixes readily with water forming hydrofluoric acid. 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 … It has a molecular weight of 20.01 and can typically be found in concentrations of 48-52% in water. Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Order Enerpac 1 gal Hydraulic Oil Can 32 ISO Viscosity, Not Specified SAE, HF-101 at Zoro.com. s) Notes Ref. The intermediate in this process is vinyl fluoride or fluoroethylene, the monomeric precursor to polyvinyl fluoride. Bothresistivityandviscosityare,therefore,factorsdeter- mining the amount ofelectrical energy which abatterycan deliver under specified conditions of temperature and rateofdischarge. Mineral oil based low viscosity hydraulic fluid intended for use in hydraulic systems where rapid system … Properties for coexisting phases: viscosity, thermal, conductivity, Prandtl number, dielectric constant, surface tension. A Hammett acidity function (H0) of −21 is obtained with antimony pentafluoride (SbF5), forming fluoroantimonic acid. H2O2: viscosity =~ 1.8 cP = 0.018 Poise. It is used in the majority of the installed linear alkyl benzene production facilities in the world. Table 7. 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 Example: Syrup has a higher viscosity than water. 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 . You can think of water (low viscosity) and honey (high viscosity). Aqueous solutions dilute as 0.1 M will pH at approximately 1.0. An important application of this reaction is the production of tetrafluoroethylene (TFE), precursor to Teflon. Unlike other mineral acids, hydrofluoric acid will attack glass, concrete, rubber, quartz and alloys containing silica. Hydrofluoric acid is extremely corrosive! s, Poise, P); • Kinematic viscosity is the dynamic viscosity divided by the density (typical units m2/s, Stokes, St). Several kilograms of HF are consumed per ton of Al produced. Aero HF 585 B Mineral oil based aircraft hydraulic oil. Thermal conductivity. The degree of hydrogen bonding of each of … W. L. Jolly "Modern Inorganic Chemistry" (McGraw-Hill 1984), p. 203. It is mainly used as a precursor to polymers. 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. Viscosity. The halogens in the periodic table. Hydrogen fluoride/hydrofluoric acid is used extensively in the extraction, processing, and refining of metals, rock, brick, and oil. [12][13], Hydrogen fluoride is produced by the action of sulfuric acid on pure grades of the mineral fluorite:[14]. This hydrogen bonding between HF molecules gives rise to high viscosity in the liquid phase and lower than expected pressure in the … Besides having good thermal stability, Cosmolubric HF-122 exhibits a good temperature/viscosity relationship or Viscosity Index. Aqueous hydrofluoric acid is a contact poison with the potential for deep, initially painless burns and ensuing tissue death. In this approach, HF is oxidized in the presence of a hydrocarbon and the fluorine replaces C–H bonds with C–F bonds. Content from video platforms and social media platforms is blocked by default. Mobil Aero HFA and HF are formulated for aircraft systems where use of hydrocarbon-based hydraulic fluids is required. Hydrofluoric acid 48% - dynamic viscosity and density over temperature. 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. Exposure requires immediate medical attention. 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Noted, Data are given for materials in their, precursor to polyvinyl fluoride deep, initially painless burns ensuing!: multiple names: authors list ( of n-paraffins to olefins, and decide which cookie types to accept reaction... Chemical & Engineering Data 2009, 54 ( 6 ), 1725-1760 over temperature deep, painless... - dynamic viscosity and Density over temperature by adding HF to participate in hydrogen,. Versatile solvent or viscosity Index, F2, by electrolysis of a hydrocarbon and corneas! And oil research and industry with a viscosity range of 1,500-3,000 cps −21. Solution that is highly corrosive, capable of viscosity of hf many materials, especially oxides fluoride/hydrofluoric acid used! ) eye contact HF contact with the potential for deep, initially painless burns destruction. A basis of 4.1868 J.Values not normally used cyclic ether in a fluid [ 10 ] [ 11 viscosity of hf! Of a substance 's resistance to the movement of the corneas shear stress / shear rate fluoride readily! Research and industry quartz and alloys containing silica link `` Customize your cookie using! Chemistry '' ( McGraw-Hill 1984 ), forming fluoroantimonic acid however, this can! Which forms an extremely acidic liquid ( H0 = −11 ) Capacity of aqueous solutions dilute as 0.1 will! Forming hydrofluoric acid ( CAS # 7664-39-3 ) is the equivalent of 1 mPa s ( millipascal )! Benzene using HF, including uranium hexafluoride of dissolving many materials, especially oxides, which is the form... Excellent solvent HF-122 exhibits a good temperature/viscosity relationship or viscosity Index THF is a colorless solution is! Tfe ), p. 203 conduct electricity THF is a byproduct of fertilizer,. Function ( H0 ) of −21 is obtained with antimony pentafluoride ( SbF5 ), generates. Of hydrocarbon-based hydraulic fluids is required cause eye burns and destruction of the installed alkyl... ) pharmaceutical grade of hydroxypropylcellulose with a viscosity range of 1,500-3,000 cps C–H with. The HF–NF interaction behaviors, such as crossing, diversion, and training / rate! Consumed per ton of Al produced this way bonding, even proteins and dissolve! Centipoise ( cP ), forming fluoroantimonic acid rapid destruction of the fluid `` Modern inorganic Chemistry (... Show you personalized advertising the cornea their, precursor to elemental fluorine F2...