Radioisotope Information: MANGANESE - 54 -- University of Wisconsin-Milwaukee Department of University Safety and Assurances: Radiation Safety Program

Radioisotope Information: MANGANESE - 54
(⁵⁴Mn)

Physical Half-life:	312.5 days
Radiations:	Gamma 835 (99.9%)keV
External Exposure:	External hazard. Radiation exposures from 1 mCi source of ⁵⁴Mn are 188 mR/hr and 47 mR/hr @ 5cm and 10 cm, respectively.
Biological Data:	ALI	2 mCi (ingestion), 0.9 mCi (inhalation)
	Biological half-life	25 days
	Effective half-life	23 days
	Critical Organs	Liver and Gastrointestinal Tract
	Bioassay	Urinalysis (Not routinely done.)
Shielding:		HVL 0.74 cm of lead; TVL 2.46 cm of lead
Monitoring & Efficiency	LSC (Eff. ~30%) NaI Gamma Counter (Eff. ~5%) Thin-window GM (Eff. less than 1%)

Special Considerations

Use forceps with rubber sleeves to handle unshielded sources and potentially contaminated vessels, and work at arms length.
Always store ⁵⁴Mn vials in lead containers or behind shields.
Wear a radiation badge when handling 1.0 mCi or more.

For additional information contact the Radiation Safety Program at 229-4275.

Updated February 27, 2008 by SAK