Calcium diphosphate; Diphosphoric acid, calcium salt (1:2); Calcium phosphate (Ca2P2O7); Calcium pyrophosphate (Ca2P2O7); Dicalcium diphosphate; Dicalcium pyrophosphate; HSDB 1435; Pyrophosphoric acid, calcium salt (1:2); UNII-X69NU20D19; alpha-Calcium pyrophosphate; Dicalcium pyrophosphate, with a fluorine content of less than 0,005 % by weight on the dry anhydrous product; diphosphoric acid, calcium salt (1:1); calcium dihydrogen diphosphate