» Technetium Tc 99m (Pyro- and trimeta-) Phosphates Injection is a sterile, aqueous solution, suitable for intravenous administration, composed of sodium pyrophosphate, sodium trimetaphosphate, and stannous chloride labeled with radioactive Tc 99m. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of ^99mTc as phosphate expressed in megabecquerels (microcuries or millicuries) per mL at the time indicated in the labeling. Other chemical forms of radioactivity do not exceed 10.0 percent of the total radioactivity.