Hydrofluoric Acid

Other names: Hydrogen fluoride solution

Molecular formula: HF

CAS No.: 7664-39-3

Molecular weight: 20.01

Melting point: -35°C

Boiling point: 19.5°C at 760 mmHg

Water solubility: soluble

Vapor pressure: 922mmHg at 25°C

Appearance: Colorless transparent to light yellow smoking

 

Uses: as a strong acid corrosive agent, as an analytical reagent, for etching glass, pickling metal, etc.; for the atomic energy industry, for the production of elemental fluorine, fluoride, and as a catalyst, fluorinating agent, etc.; for organic or inorganic fluorine It is also used in the manufacture of stainless steel, pickling of non-ferrous metals, frosting and pickling of glassware, treatment of frosted light bulbs, etc.

 

Properties: Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming corrosive liquid with a strong pungent odor. Hydrofluoric acid is a weak acid that is extremely corrosive and can aggressively attack metals, glass, and objects containing silicon. Inhalation of vapors or contact with skin may cause irreversible burns. The laboratory generally uses fluorite (the main component is calcium fluoride) and concentrated sulfuric acid to make it, and it needs to be sealed in a plastic bottle and stored in a cool place.

 

Fields of application: Due to its ability to dissolve oxides, hydrofluoric acid plays an important role in the purification of aluminum and uranium. Hydrofluoric acid is also used to etch glass, engraving patterns, marking scales and characters; the semiconductor industry uses it to remove oxides on the surface of silicon, and it can be used in refineries for the alkylation reaction of isobutane and n-butene Catalyst, hydrofluoric acid is also used in the "pickling" process that removes oxygen-containing impurities from the surface of stainless steel. Hydrofluoric acid is also used in the synthesis of various fluorine-containing organic compounds, such as Teflon (polytetrafluoroethylene) and refrigerants such as Freon.

 

Hazard Protection

No danger of explosion: This product is non-combustible, highly corrosive and irritating, and can cause burns to the human body.

Hazardous characteristics: This product is non-combustible, but it can react with most metals to generate hydrogen and cause an explosion. In case of H blowing agent, it will burn immediately. Very corrosive.

Skin contact: Take off contaminated clothing immediately, rinse with plenty of running water for at least 15 minutes and seek medical attention.

Eye contact: Immediately lift the eyelids and rinse thoroughly with plenty of running water or normal saline for at least 15 minutes. Seek medical attention.

 

 

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