Do not use chemicals outside of a fume hood.

The cleanroom uses a closed loop air conditioning system. Gases and fumes released in one bay can quickly spread to other bays through the air recirculation system putting other users at risk. The fume hoods are designed and intended to remove chemical vapors and gases from the cleanroom before they have a chance to be recirculated or inhaled by the person dispensing the chemical. It is VERY IMPORTANT that the lids on fume hoods be DOWN when you are working with chemicals under them. The exhaust system is not effective when the hood is up. This may allow vapors to escape the fume hood and enter the atmosphere of the cleanroom putting other users at risk.