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Unformatted text preview: ho may be at risk to spare them exposure to the hazard and
minimize its spread. Often the toxicity of the substance is more important than the
If a flammable material is spilled, immediately warn everyone to extinguish all
flames, to turn off spark-producing equipment such as brush-type motors, and leave
the area. You should do any work with a flammable toxic material in a laboratory
hood; if a spill occurs, close the hood window sash and call your instructor.
Promptly contain spills on laboratory benches and floors. The smaller the area
involved, the less the damage and the easier the cleanup. Follow your instructor’s
Many small liquid spills on the floor or laboratory bench (e.g., less than 200 mL)
can be absorbed with paper towels, sand, or special absorbent. Of course, whatever is
used becomes contaminated and must be handled as a hazardous waste. Be particularly careful that flammable liquids absorbed during cleanup do not present a fire hazard.
Most spills of solids can be brushed up and disposed of in appropriate solid waste containers, but exercise care to avoid reactive combinations with a chemical that was put
in the container earlier. Do not leave materials used to clean up a spill in open trashcans. Follow your instructor’s directions.
Dike larger liquid spills on the floor by surrounding the involved area with an
absorbent retaining material. Commercially available or homemade spill control kits
can be useful. If possible, use an absorbent material that will neutralize the liquids
(limestone or sodium carbonate for acids, sodium thiosulfate solution for bromine,
etc.). Commercial absorbents (e.g., Oil-Dri and Zorb-All), vermiculite, or small particles (about 30 mesh) of kitty litter or other satisfactory clay absorbents can be used.
Dry sand is less effective.
Use a dustpan and brush, and wear protective gloves to clean up dry spills and liquid spills that have been absorbed by an absorbent. Wear leather or other protective
gloves when cleaning up broken...
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- Spring '07