An extremely bitter tasting chemical compound discovered by Scottish scientists at Johnson Matthey has been awarded a Guinness world record for its huge and varied contribution to safety. The bitterest substance in the known universe forces people who ingest anything dangerous to spit it out immediately. You can detect its bitter taste at a ratio of one thimble-full to one swimming pool!
In particular, it has been added to sweet-smelling cleaning fluids and to anti-freeze which is appealing to some pets. However, its first application was to Danish pigs’ tails to stop them biting each other’s tails off. Bitrex in a cream applied to the tails solved the problem. Bitrex is itself harmless and is currently used in 60 countries.