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