Search results
Results From The WOW.Com Content Network
Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colorless, acidic and highly corrosive . A common concentration is 49% (48-52%) but there are also stronger solutions (e.g. 70%) and pure HF has a boiling point near room temperature.
It is a very poisonous, colorless gas or liquid that dissolves in water to yield hydrofluoric acid. It is the principal industrial source of fluorine, often in the form of hydrofluoric acid, and is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers such as polytetrafluoroethylene (PTFE).
Hydrofluoric acid exposure is often treated with calcium gluconate, a source of Ca 2+ that binds with the fluoride ions. Skin burns can be treated with a water wash and 2.5 percent calcium gluconate gel [64] [65] or special rinsing solutions. [66] Because HF is absorbed, further medical treatment is necessary.
The following compounds are liquid at room temperature and are completely miscible with water; ... hydrofluoric acid: 7664-39-3 H 2 SO 4: sulfuric acid: 7664-93-9 HCl ...
Hydrogen fluoride readily hydrates on contact with water to form aqueous hydrogen fluoride, also known as hydrofluoric acid. Unlike the other hydrohalic acids, which are strong, hydrofluoric acid is a weak acid at low concentrations. [130] [131] However, it can attack glass, something the other acids cannot do. [132]
The biggest concern is that the refinery continues to use the highly toxic chemical hydrofluoric acid to process fuel, a practice that Schwartz and other activists want to see stopped.
'Hydrofluoric' is analoguous to 'aqueous' as used in this context - an 'aqueous solutions is one where the solvent is water, a 'hydrofluoric solution' is one where the solvent is anhydrous hydrogen fluoride, not hydrofluoric acid. Hydrofluoric acid is far from being a superacid, it is in fact a weak acid. Plasmic Physics 04:35, 7 September 2017 ...
In water, ammonium bifluoride exists in chemical equilibrium with hydrofluoric acid and heating releases hydrogen fluoride gas. [9] Consequently, there is an equivalent toxicological risk as is present with hydrofluoric acid, and the same safety precautions apply. [10] [9] Ammonium bifluoride is used in some automotive wheel cleaning products.