http://www.stargrace-chemical.....com/food-additives/p Acid
Phosphoric Acid and wet process
Phosphoric acid (H3PO4, also known as orthophosphoric acid or phosphoric (V) acid) is a mineral inorganic acid. Orthophosphoric acid refers to phosphoric acid in which the prefix ortho is used to distinguish the acid from related phosphoric acids, called polyphosphoric acids. Orthophosphoric acid, when pure, is a solid at room temperature and pressure. The most common source of phosphoric acid is an 85% aqueous solution that is colorless and nonvolatile but is sufficiently acidic to be corrosive.
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