The nine stable cadmium isotopes are used for many different purposes. Cd-110 is used for the production of the radioisotope In-110, while Cd-112 is used in the production of the widely used diagnostic radioisotope In-111. Cd-108 is used in the production of Cd-109 which is a calibration source for 88 keV gamma radiation. The even numbered Cd isotopes (mainly Cd-110, Cd-112, Cd-114 and Cd-116) are used to improve the power output and coherence length of HeCd lasers. Cadmium isotopes can be obtained from Trace Sciences International.

Further data for radioisotopes (radioactive isotopes) of cadmium are listed separately (including any which occur naturally) in the radioisotopes section. This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments.

Isotope	Atomic mass (ma/u)	Natural abundance (atom %)	Nuclear spin (I)	Magnetic moment (μ/μN)
106Cd	105.906461 (7)	1.25 (6)	0
108Cd	107.904176 (6)	0.89 (3)	0
110Cd	109.903005 (4)	12.49 (18)	0
111Cd	110.904182 (3)	12.80 (12)	1/2	-0.5948857
112Cd	111.902757 (3)	24.13 (21)	0
113Cd	112.904400 (3)	12.22 (12)	1/2	-0.6223005
114Cd	113.903357 (3)	28.73 (42)	0
116Cd	115.904755 (4)	7.49 (18)	0

In the above picture, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which total 100% for all the naturally occurring isotopes.