For more on fume hoods, click here. Fume Hoods which pass the certification process are marked with green tape to indicate the maximum safe sash height. Hazardous Chemical - A chemical for which there is statistically significant scientific evidence, based on at least one study, that acute or chronic health affect may occur in exposed individuals. Hazardous chemicals can be separated into classes by the type of detrimental effect observed. Classes of hazardous chemicals include carcinogens, toxins, reproductive toxins, irritants, corrosives, sensitizers, mutagens, teratogens, hepatoxins, nephrotoxins, neurotoxins, etc.
Glove boxes allow the user to remain completely separated from their work.
They are typically used with extremely hazardous chemicals, to work in special atmospheres, or to prevent contamination of the work product from the outside atmosphere. Baffle - Panel located in the back of the fume hood interior which assist in controlling air flow moving within the hood. Sash - A movable and usually transparent panel set in a fume hood entrance used to assist with protecting the worker from chemical vapors and splashes. Biosafety Cabinet - A ventilating device in a laboratory, which is enclosed on five sides and has a movable sash, that is used to control occupational exposures to a variety of particulates including biological agents. In contrast to a traditional fume hood, biosafety cabinets may recirculate air from the cabinet back into the laboratory.