2,4-dinitrophenol is the main ingredient in bug sprays such as RAID. Bodybuilders of questionable sanity have used it to lose fat. It is a great way to go from 5% to 3% bodyfat. It is also a great way to kill yourself, and more than a few bodybuilders have. It is very easy to overdose, and once you do its 3 days of knowing you're going to die, and knowing there is nothing you can do about it.
No supplement company is going to sell it, which means that the product shown above is only made to sound like it contains 2,4-dinitrophenol, or only contains it in trace amounts.