What is the fire hazard classification for hydrogen fluoride gas?
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Hydrogen fluoride gas is generated during the production process. What is the fire hazard classification for hydrogen fluoride gas? What is the fire hazard classification of hydrofluoric acid dissolved in water?
Hydrogen fluoride is a **chemical**, but it’s also flammable – how come the original poster asked about its fire hazard classification?
Hydrogen fluoride does not burn; it is a weakly acidic gas that reacts only with alkaline substances, including silicon dioxide (found in glass). Since it does not burn, it does not undergo any redox reactions with other substances. As fluoride ions carry a negative charge and fluorine has the highest electronegativity, it cannot be oxidized nor reduced. Of course, hydrofluoric acid is extremely corrosive; it can corrode many metals and also has a corrosive effect on human teeth and bones. Special care must be taken when using it. At present, there is no ideal treatment for hydrofluoric acid burns, and it is said that in cases of severe burns, calcium salts can only be injected to alleviate the symptoms.