Chemistry Laboratory Safety Rules http://www.sterlingschools.org/shs/stf/cbrown/Chemistry Laboratory Safety Rules.ppt

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Chemistry Laboratory Safety Rules
http//www.sterlingschools.org/shs/stf/cbrown/Chem
istry20Laboratory20Safety20Rules.ppt
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Sharps Safetyhttp//web.mit.edu/cohengroup/safety
/sharps.pdf

• A high degree of precaution must always be taken
  with any sharp items used in the laboratory,
  including needles and syringes, glass slides and
  cover slips, Pasteur pipettes, capillary tubes,
  as well as broken glass, and scalpels, blades,
  and knives. Sharps must be disposed of in an
  approved sharps container. Sharps containers may
  never be placed in the normal waste stream or
  used for any purpose other than sharps disposal.
• Sharps containers have to be
• Puncture Resistant
• Clearly marked
• Within easy reach of the work station
• Filled to no more than 3/4 capacity
• Sealed (i.e. capped or taped) prior to transport

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Sharps Safety

• CHEMICALLY CONTAMINATED SHARPS
• Sharps contaminated with hazardous materials must
  be placed in a puncture proof container and
  sealed with a screw-on cap. The container must be
  labeled as hazardous waste, with the associated
  chemicals identified. Contact Phil Dennicort in
  the Chemical Stock Room (x 2338) for disposal.
• In case you poke yourself with sharps
• Squeeze out blood
• If necessary, seek medical attention immediately
  (know what was the contaminants of the
  sharps/what was in the needle).

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Safety Topic Chemical Hoodhttp//web.mit.edu/co
hengroup/safety/hood.pdf

• General purpose prevent exposure to toxic,
  irritating, or noxious chemical vapors and gases.
  A face velocity of 100 feet per minute (fpm)
  provides efficient vapor capture while reducing
  hood turbulence.

• Baffles -- keep the airflow uniform across the
  hood opening, thus eliminating dead spots and
  optimizing capture efficiency.
• Sash --Airflow across the hood can be adjusted
  by sash height to the point where capture of
  contaminants is maximized.
• Airfoil -- Preventing the creation of turbulent
  eddies that can carry vapors out of the hood. The
  space below the bottom airfoil provides source of
  room air for the hood to exhaust when the sash is
  fully closed.
• Exhaust plenum -- An important engineering
  feature, the exhaust plenum helps to distribute
  airflow evenly across the hood face.
• Face -- The imaginary plane running between the
  bottom of the sash to the work surface. Hood face
  velocity is measured across this plane.

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Common Chemical Hood Misconception

• Myth - When working with highly hazardous
  materials, the higher the face velocity the
  better
• While it is important to have a face velocity
  between 100 and 125 fpm, velocities higher than
  this are actually harmful. When face velocity
  exceeds 125 fpm eddy currents are created which
  allow contaminants to be drawn out of the hood,
  increasing worker exposures.
• Myth - A chemical hood can be used for storage of
  volatile, flammable, or odiferous materials when
  an appropriate storage cabinet is not available.
• Hoods are not designed for permanent chemical
  storage. Each item placed on the work surface
  interferes with the directional airflow, causing
  turbulence and eddy currents that allow
  contaminants to be drawn out of the hood.
• Myth - The airfoil on the front of a hood is of
  minor importance. It can safely be removed if it
  interferes with my experimental apparatus.
• Airfoils are critical to efficient operation of a
  chemical hood. With the sash open an airfoil
  smoothes flow over the hood edges. Without an
  airfoil eddy currents form, causing contaminates
  to be drawn out of the hood. With the sash
  closed, the opening beneath the bottom airfoil
  provides for a source of exhaust air.

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Safe Hood Operating Procedure

• Constant volume hood the volume of air
  exhausted is constant, regardless of
• sash height.
• Proper positioning of the sash is vital to
  maintaining the optimum face velocity (100 or 125
  fpm).
• Too high lowers face velocity, allowing
  contaminants to escape from the hood
• Too low results in very high face velocity,
  excessive turbulence and loss of containment
• Confirm that the hood is operational switch
  on, airflow gauge or flow check ribbon hood
  test data and optimum sash height - yellow label
  affixed to the hood face
• Maintain operations at least 6" inside the hood
  face.
• Lower sash to optimum height maximized airflow
  without turbulence (17 in accordance to the
  rules in Colgate University http//offices.colgate
  .edu/chemmgt/fumehoodvalprog.htm)
• Keep head out of hood
• Keep hood storage to an absolute minimum
• Minimize foot traffic around the chemical hood
• Use extreme caution with ignition
• Replace hood components prior to use

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Protect Your Eyes http//www.sterlingschools.org/s
hs/stf/cbrown/Chemistry20Laboratory20Safety20Ru
les.ppt

• Appropriate eye protection must be worn at all
  times!

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Wear appropriate protective clothing

• Your clothing should cover your legs to the knees
  shorts are not appropriate for the laboratory
• Lab aprons can be used to protect good clothing
• Loose clothing should not be worn because it may
  dip into chemicals or fall into a flame and catch
  fire

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Wear shoes that cover your feet.

• Sandals and open-toed shoes do not protect your
  feet from broken glass that is frequently found
  in the lab
• Also, leather shoes protect your feet from
  chemical spills canvas shoes do not.

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Do not apply cosmetics, eat, or drink in the lab.

• These activities are ways by which you can
  accidentally ingest harmful chemicals

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Do not taste any chemical!
12
Pour from large containers to smaller ones.
13
Always ADD ACID to water

• acid
• water
• Do not spit into acid! a good phrase to
  remember this rule.

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Hold your hand over the label while pouring.
15
Work with volatile chemicals under a fume hood.
16
Check glassware for stars or cracks.
17
Heat test tubes at an angle, directing the
opening oppositely to you and other people in the
laboratory.
18
Handle hot glassware with gloves or beaker tongs.
19

• First light the match
• THEN
• Turn on the gas!

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Do not smell any chemicals directly!

• If absoluteley necessary to smell, use your hand
  to fan the vapor to your nose.

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Do not pipet solutions by mouth!

• Use a rubber suction bulb or other device to fill
  a pipet.

22
Wash your hands with soap and water before
leaving.

• This rule applies even if you have been wearing
  gloves!

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Know the hazards of the materials being used.

• Read and reread labels carefully to make sure
  that you are using the right chemical.

• Know how to interpret data from a MSDS.

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Tie Back Loose Hair

• Dangling hair can fall into the Bunsen burner and
  catch fire or can fall into a chemical solution
• P.S. Burning hair REALLY STINKS!

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Know the safety equipment

• Eye wash fountain
• Safety shower
• Fire extinguisher
• Emergency exits

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Know how to use the safety equipment

• Eye wash Fountain
• Safety Shower
• Fire extinguisher
• Emergency Exit

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Know how to respond to an emergency

• Clarkson University 268-6400
• Emergensy Number (after working hours) 268-6439
• Campus Safety 268-6666
• Fire Dep 9-265-3311
• Hospital 9-265-3300/3304/5720
• Police 9-265-2121/2122
• Rescue Squad 911
• (numbers are located near the each lab exit door)

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Never remove chemicals from the laboratory

• This guy put chemicals in his locker!

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Dont work alone in the lab

• In case of a problem, you may need another person
  to prevent injury or even save your life!

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Remember that the lab is a place for serious work!

• Careless behavior may endanger yourself and
  others and will not be tolerated!

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Demonstrate safe behavior

• Obey all safety instructions.
• Clean up spills immediately IF you know how. If
  you are uncertain how to clean up a spill or if a
  large spill occurs, notify persons in accordance
  to the emergency procedure.

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Demonstrate safe behavior

• Before leaving the lab

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Demonstrate safe behavior

• Before leaving the lab
• Return equipment and chemicals to their proper
  places

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Demonstrate safe behavior

• Before leaving the lab
• Return equipment and chemicals to their proper
  places
• Be sure to replace the lids to all containers

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Demonstrate safe behavior

• Before leaving the lab
• Return equipment and chemicals to their proper
  places
• Be sure to replace the lids to all containers
• Clean up your work area

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Know how to dispose of waste

• Dispose of all waste materials according to your
  instructional
• ? ? ? ?

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Report any accidents or unsafe conditions
immediately!