Can anyone tell me what chemical is used to treat bed bugs?

It requires a lot. More than a chemical. Declutter entire bedroom ; other effected rooms. Check site: http://treatmentforbedbugs.Com/ put all junk in tightly sealed plastic ; dispose of it. Wash clothing, linens, towels in hot water. Dry on highest heat - then repeat. Place clean items in a sealed bag to prevent re-infestation. Steam clean what can't go in drier. Vacuum everything using a disposable bag. Seal.