» Factor IX Complex conforms to the regulations of the federal Food and Drug Administration concerning biologics (see
Biologics 1041). It is a sterile, freeze-dried powder consisting of partially purified Factor IX fraction, as well as concentrated Factors II, VII, and X fractions, of venous plasma obtained from healthy human donors. It contains no preservative. It meets the requirements of the test for potency in having not less than 80 percent and not more than 120 percent of the potency stated on the label in Factor IX Units by comparison with the U.S. Factor IX Standard or with a working reference that has been calibrated with it.