Lab Safety

The Do's and Dont's of the Science Lab

General Procedure

  • Never work without the supervision of a teacher/lab supervisor.
  • Never leave experiments while in progress.
  • Only use materials according to instruction.
  • Never eat or drink in the lab.
  • Always wash your hands before leaving the lab.


  • Tie long hair back.
  • Wear closed-toe, closed-heel shoes.
  • Wear a full length, long-sleeved lab coat, or chemical resistant apron when necessary.


  • At the end of experiments, clean and rinse out all materials, and put them back in their original places.
  • Never leave electrical cords near water sources.

Chemical Handling

  • Do not directly touch chemicals with your bare hands.
  • Never just pour chemicals down the drain. Ask your teacher or lab supervisor how to dispose of the chemicals being used.
  • Never return unused chemicals to the original container.

Emergency Procedure

Know the locations and how to operate the following:

  • Fire extinguishers
  • Fire blankets
  • First-aid kits
  • Safety showers
  • Eye washers
  • Emergency shut-off buttons
Lab Techniques & Safety: Crash Course Chemistry #21