diphosphoric acid
A chemical compound; used in biochemistry and industrial contexts. The term is technical and domain-specific.
Diphosphoric acid is involved in energy metabolism in living organisms.
Standard modern spelling using katakana for the phosphorus component.
Older kanji spelling using 燐; now largely replaced by リン in chemical contexts.
Formed from 二, “two,” and リン酸, “phosphoric acid,” following chemical nomenclature for an acid containing two phosphorus atoms.