Onlyfewkryptoncompoundshavebeenreported.
Liketheothernoblegases,kryptonischemicallyunreactive.However,followingthefirstsuccessfulsynthesisofxenoncompoundsin1962,synthesisofkryptondifluoridewasreportedin1963.Thereareunverifiedreportsofotherfluoridesandasaltofakryptonoxoacid.ArKr+andKrH+molecule-ionshavebeeninvestigatedandthereisevidenceforKrXeorKrXe+.
AttheUniversityofHelsinkiinFinland,HKrCNandHKrCCH(kryptonhydride-cyanideandhydrokryptoacetylene)weresynthesizedanddeterminedtobestableupto40K.