Name: Hydrofluoric acid

English name: Hydrofluoric acid

Other names: hydrofluoric acid, hydrogen fluoride, hydrogen fluoride solution

Chemical formula: HF

Molecular weight: 20.0063

CAS registration number: 7664-39-3

EINECS accession number: 231-634-8

Melting point: -83.3°C

Boiling point: 19.54℃

Water solubility: easily soluble in water

Closeness: 1.15 g/mL

External view: colorless and transparent to light yellow smoke

Flash point: 112.2℃

Application: as a strong acid corrosive agent, as an analytical reagent, used for etching glass, pickling metal, etc.

Security description: S: 1/2-7/9-26-36/37-45

Dangerous symbol: T+:Very toxic; C:Corrosive;

Hazard description: R: 26/27/28-35

IUPAC name: Hydrofluoric acid

RTECS: MW7875000

Molar mass: 20.01

MSDS: duPont MSDS

Main hazard: strong corrosiveness

Application field

Due to the ability of hydrofluoric acid to dissolve oxides, it plays an important role in the purification of aluminum and uranium. Hydrofluoric acid is used to etch glass, can engrave patterns, mark scales and text; the semiconductor industry uses it to remove oxides on the silicon surface, and it can be used as a catalyst for the alkylation of isobutane and n-butene in oil refineries. , Hydrofluoric acid is also used in the "pickling" process to remove oxygen-containing impurities on the surface of stainless steel. Hydrofluoric acid is also used in the synthesis of a variety of fluorine-containing organics, such as Teflon (polytetrafluoroethylene) and refrigerants such as Freon.