Laboratory Safety_1_ by hcj


									An Overview
Why cover this?
 This year, you will be doing many hands-on laboratory
  experiments , many of which require the use and
  handling of hazardous chemicals.

 This lesson covers many tips for staying safe in the lab.
General Rules
 No horseplay in the lab! Conduct yourself in a
  responsible manner. Practical jokes are dangerous and
  thus are prohibited!
 Follow all written and verbal instructions. If you
  do not understand the directions, ask your instructor
  before proceeding.
 Do not eat, drink, or chew gum in the laboratory.
  Do not use glassware as food or drink containers.
 Keep work area clean to avoid contamination of
  experiment or personal belongings.
General Rules
 Know the locations of all safety equipment in the
 lab. (ex: fire extinguisher, eyewash station, safety
 shower, etc.)

 Work in a well-ventilated area. If you feel faint or
  sick, step out of the lab for fresh air.
 Be alert at all times in the lab. Be aware of your
 Keep hands away from your face and mouth during
  the lab to avoid contamination.
Clothing Rules
 Wear your goggles at all times during a lab!!
 Long hair must be pulled back.
 Dangling jewelry or loose-fitting clothing must be

 Shoes must completely cover the foot. No sandals
 Lab aprons and/or lab coats may be worn if available.
Accidents and Injuries
 Report any accident (spill, breakage, etc.) or injury
  (cut, burn, etc.) to your teacher IMMEDIATELY, no
  matter how trivial it may seem.
 If a chemical splashes in your eye or on your skin,
  flush it IMMEDIATELY with running water. Have a
  lab group member notify the teacher.
 When mercury thermometers are broken, DO NOT
  TOUCH the mercury. Notify the teacher
Handling Chemicals
 All chemicals are considered dangerous.
 Do not touch, smell, or taste chemicals unless
  directly told to do so by your instructor.
 When asked to smell a chemical, be sure to “waft”, do
  not smell directly!

 Check the label twice on a chemical container before
  removing its contents. Take only as much as you need.
 Never return unused chemicals to their original
Handling Chemicals
 When diluting acids, always add ACID TO WATER,
  not water to acid. This may result in an explosion.
  (AP – Think about thermo rxns.)
 Never dispense flammable liquids anywhere near an
  open flame or heat source.

 Never remove chemicals from the laboratory area.
 Hold all chemicals securely when transporting them
 throughout the room. Walk carefully.
Handling Glassware and Equipment
 Never touch broken glass with your bare hands. Use
  a brush and dustpan to pick up and place in glass
  disposal container.
 Examine glassware before use. Do not use broken,
  chipped or dirty glassware.
 When removing an electrical plug from the socket,
  grasp the plug, not the cord. Be sure your hands are
 Notify the teacher of any broken or frayed electrical
  cords! Do not use it!
Handling Glassware and Equipment
 If you do not know how to use a piece of equipment,
  please ask your instructor prior to proceeding.
 Never place chemicals directly on the pan of a
 Do not immerse hot glassware in cold/cool water. It
  may shatter.
Heating Substances
 Exercise extreme caution when using a heat source
 (bunsen burner, alcohol flame or hot plate)
   Be sure long hair is tied back and loose clothing/jewelry
    is secured.
 Do not put anything into the flame unless
  specifically instructed to do so.
 Never reach over an open flame.
 Never leave a lit burner/hot plate unattended.
  Turn off all heat sources that are not in use.
Heating Substances
 Do not point the open end of a test tube or flask
 towards yourself or other group members while it is
 being heated.

 Never look into a container that is being heated.
 Heated metals and glassware remain hot for a long
  period of time. You may not be able to tell whether
  something is hot just by looking at it!
 Do not place a hot apparatus directly on the lab bench.
  Always use an insulating pad.

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