Hexasodium tetraphosphate with cas registry number of 14986-84-6 is also known as Hexanatriumtetrapolyphosphat ; Hexanatriumtetrapolyphosphat [German] ; Hexasodium tetrapolyphosphate ; Quadrafos ; Quadraphos ; Sodium phosphate (Na6P4O13) ; Sodium tetraphosphate ; Sodium tetrapolyphosphate ; Tetraphosphoric acid, hexasodium salt .