» Iobenguane I 123 Injection is a sterile solution containing iobenguane sulfate in which a portion of the molecules contain radioactive iodine (¹²³I) in the molecular structure. Iobenguane I 123 Injection contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of I 123 as iobenguane expressed in megabecquerels (or in millicuries) per mL at the time indicated in the labeling. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of iobenguane. It may contain preservatives or stabilizers.