Radiochemical Products


Cobalt-57 is a cyclotron-produced isotope primarily used in the manufacture of flood sources and standards for the calibration of radiometric equipment. For industrial use only, not for use in humans.

Cobalt- 57

Physical Characteristics

Half Life 271.8 days

Form and Concentration

Chemical Form CoCl2 in 0.1 M HCl
Radioactive Concentration >50 mCi/mL*
Radionuclidic Purity ≤0.12 % combined 56/58, lower contaminants available on request*
Specific Activity >6200 Ci/g
Impurities Fe≤0.05, Cu≤0.05, Ni≤0.05 µg/mCi


Calibration 12:00 noon day of receipt (EST)

*Contact Radiochemical Customer Service for special orders and availability.


Ordering Information

Radiochemical Customer Service

tel: 1-800-299-3431