Relating to or describing compounds that contain two phosphorus atoms or two phosphate groups bonded together.
From di- (two) + phosphoric (relating to phosphorus, from Latin phosphorus 'light-bringer'). Used as a descriptive term in chemistry for molecules with dual phosphorus functionality.
Diphosphoric acid was actually one of the first acids ancient alchemists could make with certainty, and studying it helped them understand how acids and bases work long before modern chemistry existed.
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