What's that you ask?
According to Wikipedia it is:heterocyclic aromatic chemical compound

It's blue and it stains!
It's a remedy to cure sore throats and it really works.

Use a Q-tips to dip into the solution and apply as far as possible inside your throat (or tongue if you can't reach)
I've used it many times when i felt i was getting a cold and it was gone the next day.

Now watch out for your clothes or hands cause it stains.

It is somehow a little difficult to find. I found it in Shoppers in Quebec (under their "Life" label) but maybe natural food place would have them.

it's really cheap, under 3$