[robocat]

> In all chemical reactions tritium behaves identically with regular hydrogen.

False. For example there is a an increases the strength of water's hydrogen–oxygen bonds. Tritium acts similarly to Protium, however it has chemical differences (ignoring the radioactivity).

Even Deuterium has enough chemical difference to be poisonous in large quantities, even though it is not radioactive. Wikipedia: “When a large fraction of water (> 50%) in higher organisms is replaced by heavy water, the result is cell dysfunction and death.”