Inorganic acid, not volatile, not easy to decompose, almost no oxidizing, its acidity is weaker than hydrochloric acid, sulfuric acid, nitric acid, but stronger than acetic acid, boric acid and so on.

Phosphoric acid can be used to acidify drinks or food and feed, and is also widely used in medical beauty, medicines, solvents, electrolytes, fertilizers, metallurgy, metal processing, etc.