Work at chemical lab


In the laboratory there may be many chemical hazards due to various different chemicals (corrosive, flammable, toxic etc.) and chemical reactions that may get out of control. This guide adds to the provisions of the Israeli laws and legislations. PIs are responsible for compliance with all safety requirements in laboratories under their supervision. They are also responsible for enforcing the law and Weizmann Institute's guidelines in their laboratories as well as for implementing safety guidelines by employees/students and all those entering laboratories under their responsibility. The PI is responsible for preparing written work procedures for defined work processes. These procedures must be available to all of the lab members. The following procedures define instructions and recommendations of the safety unit for laboratory work.

General guiding principles

The following guiding principles aim to minimize risks and achieve safety in the laboratory.

  1. While working with chemicals wear long closed lab coat made of 100% cotton knit cuff sleeves and snap bag buttons, liquid repellent closed shoes (not made of fabric), long paints, safety glasses and gloves.
  2. Avoid tasting or smelling chemicals.
  3. Before working with any chemical:
  • Carefully read the label on the bottle.
  • Go over the safety sheet (MSDS) to know associated risks.
  • Determine potential hazards and use appropriate safety precautions before beginning any new procedure.
  1. Pay attention to unsafe environment and warn in order to act quickly.
  2. Use equipment and chemicals only for their intended purpose.
  3. Check equipment before using it: look for cracks, leaks, malfunctions of the hood or personal safety equipment etc.
  4. Be familiar with the location of emergency equipment: fire extinguisher, emergency eyewash/shower stations and emergency masks. Know the appropriate emergency response procedures.
  5. Avoid any distraction when handling chemicals.