Technetium Tc 99m Etidronate Injection
» Technetium Tc 99m Etidronate Injection is a sterile, clear, colorless solution, suitable for intravenous administration, of radioactive technetium (99mTc) in the form of a chelate of etidronate sodium. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of 99mTc as chelate expressed in megabecquerels (microcuries or millicuries) per mL at the time indicated in the labeling. It may contain buffers, preservatives, reducing agents, and stabilizers. Other chemical forms of radioactivity do not exceed 10.0 percent of the total radioactivity.
Packaging and storage— Preserve in single-dose or multiple-dose containers.
Labeling— Label it to include the following, in addition to the information specified for Labeling under Injections 1: the time and date of calibration; the amount of 99mTc as labeled etidronate expressed as total megabecquerels (microcuries or millicuries) and concentration as megabecquerels (microcuries or millicuries) per mL at the time of calibration; the expiration date and time; and the statement “Caution—Radioactive Material.” The labeling indicates that in making dosage calculations, correction is to be made for radioactive decay, and also indicates that the radioactive half-life of 99mTc is 6.0 hours.
pH 791: between 2.5 and 7.0.
Other requirements— It meets the requirements for Bacterial endotoxins, Radiochemical purity, Biological distribution, Other requirements, and Assay for radioactivity under Technetium Tc 99m Pyrophosphate Injection.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Ian DeVeau, Ph.D.
Director, Veterinary Drugs and Radiopharmaceuticals
(RMI05) Radiopharmaceuticals and Medical Imaging Agents 05
Reference Standards Lili Wang, Technical Services Scientist
USP32–NF27 Page 3661