Trace Sciences International

Krypton Isotopes

Nominal Mass
Accurate Mass
% Natural Abundance
Chemical Form
Enrichment Available %

78 Kr

77.920396 (9)

0.35 (1)

gas

99+

80 Kr

79.916380 (9)

2.28 (6)

gas

99+

82 Kr

81.913482 (6)

11.58 (14)

gas

99+

83 Kr

82.914135 (4)

11.49 (6)

gas

99+

84 Kr

83.911507 (4)

57.0 (4)

gas

99+

86 Kr

85.910616 (5)

17.3 (22)

gas

99+

Krypton Isotopes are used in various medical and scientific applications. Kr-82 is used for the production of Rb-81/Kr-81m generators. Many of the stable isotopes of Krypton are used in the study of the pulmonary system. Kr-78 can be used for the production of Br-75 although production of Br-75 via Se-76 is more common. Kr-86 has been used to define the standard measure of length: 1 meter is exactly 1,650,763.73 wavelengths of this isotope.