Nitric acid (HNO3)

It is a hydrogen oxoacid with a chemical formula of HNO3. It appears as a colourless liquid in its pure form. Its synonyms include hydrogen nitrate, aqua fortis, Acidum nitricum, nitryl hydroxide, spirit of nitre, azotic acid, nitryl hydroxide, engraver’s acid, acido nitrico and nitricum acidum just to mention a few. It is referred to as red fuming nitric acid when its concentration is above 86% and white fuming nitric acid when its concentration is above 95%.  Red fuming nitric acid appears as a pale yellow to a reddish-brown liquid that generates red-brown fumes and has a suffocating odour.

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