Ferric Pyrophosphate

We offer ferric pyrophosphate
ferric pyrophosphate occurs as a yellow to yellow-brown powder. It
is odorless and has a slight, iron taste.
identification (1) to 0.2 g of ferric pyrophosphate, add 10 ml of sodium
hydroxide solution (1 → 25), and filter the red－brown precipitate formed. Dissolve
the residue on the filter paper with diluted hydrochloric acid (1 → 4). The solution
responds to the test for ferric salt.
(2) add diluted nitric acid (1 → 10) to the filtrate obatained in test (1) above to
make it slightly acidic, and add silver nitrate solution (1 → 50). A white precipitate is
formed.