Avoid hazards to the environment by following accepted waste disposal procedures. Chemical reactions may require traps or scrubbing devices to prevent the escape of toxic substances. Be certain all chemicals are correctly and clearly labeled. Post warning signs when unusual hazards, such as radiation, laser operations, flammable materials, biological hazards, or other special problems exist. Remain out of the area of a fire or personal injury unless it is your responsibility to help meet the emergency.
Curious bystanders interfere with rescue and emergency personnel and endanger themselves.
Avoid distracting or startling any other worker. Practical jokes or horseplay cannot be tolerated at any time. Use equipment only for its designed purpose. Position and clamp reaction apparatus thoughtfully in order to permit manipulation without the need to move the apparatus until the entire reaction is completed. Combine reagents in appropriate order, and avoid adding solids to hot liquids.