Hydrogen Fluoride CAS 7664-39-3

Hydrogen fluoride (HF for brief), additionally called fluoric acid, is an aqueous solution of anhydrous hydrogen fluoride gas, which is very harsh and also extremely poisonous.

Hydrofluoric acid is a colorless, transparent to pale yellow smoky liquid at room temperature with a pungent odor.

Hydrogen fluoride reacts with sulfur trioxide or chlorosulfonic acid to generate fluorosulfonic acid, and reacts with halogenated aromatic hydrocarbons, alcohols, alkenes, and hydrocarbons to generate fluorine-containing organic compounds.

It is easy to fester when it touches the skin, and its degree is more severe than any acid. If the vapor is inhaled, it can be fatal, so strict attention must be paid when using it.

Anhydrous hydrogen fluoride has relatively strong bonding ability between hydrogen atoms and fluorine atoms, so that hydrofluoric acid cannot be completely ionized in water.

Therefore, in theory, low-concentration hydrofluoric acid is a weak acid, but hydrofluoric acid can dissolve many silica glasses that other acids cannot.

As an industrial resources, hydrogen fluoride is commonly used in the manufacture of products such as cooling agents, fuel as well as light weight aluminum.