hydrogen fluoride

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hydrogen fluoride

A colorless, fuming corrosive liquid or a highly soluble corrosive gas, HF, that is extremely toxic, used in the manufacture of hydrofluoric acid, as a reagent, catalyst, and fluorinating agent, and in the refining of uranium and the preparation of many fluorine compounds.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hydrogen fluoride

1. (Elements & Compounds) a colourless poisonous corrosive gas or liquid made by reaction between calcium fluoride and sulphuric acid: used as a fluorinating agent and catalyst. Formula: HF

2. (Elements & Compounds) an aqueous solution of hydrogen fluoride; hydrofluoric acid

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

hy′drogen fluor′ide

a colorless corrosive gas, HF, the anhydride of hydrofluoric acid, used chiefly as a catalyst and in the fluorination of hydrocarbons.

[1905–10]

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Noun

hydrogen fluoride - a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid

fluoride - a salt of hydrofluoric acid

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Samsung, for instance, has stepped up testing of non-Japanese photoresists and hydrogen fluoride, several sources familiar with the chip supply chain said.

Japan's curbs on high-tech materials exports to South Korea could backfire

The price of Soulbrain's shares shot up in early July as the company gained attention for possibly being able to substitute for Japan's exports of hydrogen fluoride, which came under new restrictions.

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A company, which wished to remain low-profile when contacted by The Korea Herald, is a local producer of hydrogen fluoride, whose share price surged 40 percent on Tuesday from June 28, a day before the export curbs were announced.

S. Korean tech firms seek localization, diversification amid escalating trade row

The chemical bonding is a wide universe to be explored even though might be guided by the functionality of the "bonding zoo" [80] (F.O.N.) in the hydrogen fluoride dimer, water and ammonia.

Hydrocarbons as Proton Receptors and Evidences of Unconventional and Unusual [[pi].sup....]H, p-[[pi].sup....] and [C.sup....]H Hydrogen Bonds

As shown in Figure 1, in the (HFO Blend)/POE system, the change in lubricant color indicative of lubricant decomposition was not observed at the low as well as high concentration in the control and in twelve chemicals (including polyoxyethylene nonylphenyl ether, propylene glycol, sodium gluconate, EDTA, iron (III) phosphate dihydrate, sodium molybdate, sodium paratoluene sulfonate, potassium hydrogen fluoride, trisodium phosphate dodecahydrate, sodium carbonate, neodecanoic acid, and ferric chloride), while five chemicals (benzotriazole, ethanolamine, chloroparaffin, hydroxyethyl cellulose, and sodium palmitate) showed color changes at both concentrations.

Effects of System Materials toward the Breakdown of Lubricants and Low-GWP Refrigerants

They include: ammonia, hydrogen fluoride, cadmium and thallium, mercury, lead, cobalt, nickel, arsenic, zinc, vanadium, copper, chromium, manganese, dioxin-like polychlorinated biphenyls (PCBs), and benzo(a)anthracine and benzo(b)fluoranthene.

Runcorn incinerator burns more waste than permit maximum; Environment Agency says no regulatory action required

Fire crews responded to reports of a leak of hydrogen fluoride at an industrial plant on Lever Street in Bolton.

Man is burned in factory gas leak; health and safety watchdogs launch inquiry after toxic chemical escapes

Acidic pH favors the formation of hydrogen fluoride (HF).

Cost Effective Approach for Water Defluoridation

Hydrogen fluoride (HF), as a byproduct of the electrolysis of alumina, is one of the most harmful gases when it comes to impact on human health and therefore place great emphasis on the reduction in the working environment [1].

Vacuum Increase in the Electrolytic Cell With the Aim of Reducing Emissions Into the Work Environment

(5) Author in this study postulated that at lower pH, hydrogen fluoride reaction move towards left and will be less in dissociated form.

Antibacterial activity of fluoride coated hydroxyapatite graft--an added advantage

However, Quantitech MD Ken Roberts says: "Customers will be particularly interested in this certificate because of the exceptionally good figures for Hydrogen Fluoride, Nitrogen Oxide and Formaldehyde"