Do not dump in water or drain down the, absolutely do not set on fire. Don't bury it.
Don't do if you don't know chemistry or have protective gear:
There are ways to turn into some thing else, but it's very dangerous. You could use some to preserve certain foods, but again, know what you are doing and sure that you know how.
Or you can just search up the nearest chemicals waste disposal facility, give them a call, and drop it off there. Of they ask you why you have it, say you are a hunter or chef as a hobby. This is the most safe way.