SUBJECT: 8 Points for Safe Laboratory Hood Use

8 Points for Safe Laboratory Hood Use

  1. Limit chemical storage in fume hoods. Hoods are not intended for storage, therefore, chemicals should be moved from hoods to cabinets for storage.

  2. Hoods should not be regarded as a means for disposing of chemicals. Do not purposefully evaporate solvents in a hood.

  3. When using large apparatus inside the hood, place the apparatus on blocks when safe and practical to allow air flow beneath it. Operate the hood with the vertical sash as low as practical. If the hood is equipped with horizontal sashes, keep them closed as much as practical. Keeping the hood opening small will increase overall performance.

  4. Sliding sashes should not be removed from horizontal sliding-sash hoods. The hood should be kept closed, except when adjustments of apparatus within the hood are being made. Work at least 6 inches into the hood. Use sliding sash for partial protection during hazardous work.

  5. Do not lean into the hood, make quick motions into or out of the hood or walk quickly by the hood opening since this causes airflow disturbances.

  6. Use the right hood for the job.

    • General Purpose
    • Perchloric Acid
    • Radioisotopes
    • Biological

    Label hoods for special use when practical.

  7. If you are concerned about the efficiency of your lab hoods contact Physical Plant at 785-8585.

  8. Do not leave a fume hood unattended while conducting an experiment in the hood. This is especially important when using flammable liquids. If lab procedure requires evaporation of flammable liquid the hot plate and other equipment should be designated for use in class I, division I flammable environments.