safety first! st hs: follow all instructions w instructions may be verbal. w instructions may be...
TRANSCRIPT
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SAFETY FIRST!
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FOLLOW ALL INSTRUCTIONS
Instructions may be verbal.
Instructions may be written.
Do not perform unauthorized experiments.
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STUDY ALL INSTRUCTIONS
Read instructions carefully.
Know about hazards before you begin.
READING + KNOWING = SUCCESS
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REPORT ALL ACCIDENTS
Report accidents to your teacher.
React to accidents quickly and calmly.
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ACT IN A RESPONSIBLE MANNER AT ALL TIMES
The laboratory is a work place.
The laboratory is not a playroom.
Horseplay will not be tolerated.
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KNOW YOUR SAFETY EQUIPMENT
Goggles - for eye protection
Eyewash station - for flushing of the eyes
Fire blanket - for smothering clothing fires
Safety shower - for clothing fires as well as extensive chemical spills on body.
Fire extinguisher - for fires NOT on a person
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WEAR YOUR SAFETY GOGGLES
activities involving chemicals
activities involving heating of materials
activities involving glass materials!
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STAY OUT OF RESTRICTED AREAS
Certain areas may present special hazards.
Enter restricted areas only with teacher permission.
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KEEP YOUR WORK AREA CLEAR
Keep personal items not needed for an experiment away from the lab area.
Keep aisles free of all obstructions and book bags!
Place equipment and materials not needed for a lab activity in their proper storage area.
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CLEAN UP ALL SPILLS
Tell your teacher what was spilled. Clean up minor spills with paper towels. Clean up a solid spill with a broom and
dustpan and dispose of it where indicated by your teacher.
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BROKEN GLASSWARE
Clean up broken glassware with a broom and dustpan.
Dispose of broken glassware in the special box provided in the lab area.
Inform the teacher of the break and get a replacement.
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WEAR APPROPRIATE CLOTHING
Loose fitting clothing or jewelry can get damaged by equipment, chemicals, or heating devices.
Clothing damage may lead to bodily injury. Wear aprons to protect clothing when
appropriate.
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INSTRUCTIONS WHEN USING GAS OR
HOTPLATES
Do not play with gas valves.
Do not leave Bunsen burners or hotplates unattended.
Turn off Bunsen burners or hotplates when they are not being used.
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SPECIAL ELECTRICAL HAZARDS
The biggest electrical hazard in laboratory situations is electrical shock.
The human body is a good conductor of electricity
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REDUCE THE POSSIBILITY OF SHOCK
Turn power off to work on equipment. Turn power off when you are finished. Avoid letting metal objects come in contact
with exposed connections. Don’t stand on a wet floor when working
with electrical equipment. Keep your work area uncluttered.
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SPECIAL MECHANICAL HAZARDS
Spinning components can cut skin or clothing.
Objects that come into contact with a spinning component can cause sparks or can damage the equipment.
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OTHER MECHANICAL HAZARDS
Moving gears are able to pinch skin and snag clothing.
Weights can cause injury if dropped on a foot or hand. Use care when handling weights particularly in a pulley experiment.
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SPECIAL HAIR INSTRUCTIONS
Tie back long hair when using chemicals, heat, or equipment with gears or spinning parts.
Hair preparations such as hairspray, gels, and mousse are often very flammable. Their use in a lab situation is discouraged.
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NO EATING OR DRINKING IS ALLOWED IN THE
LABORATORY.
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PROPER USE OF CHEMICALS AND
EQUIPMENT
Use equipment in the manner indicated by your teacher.
Read the labels on chemicals very carefully. Equipment and chemicals are NOT to be
removed from the laboratory without teacher permission
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THE RIGHT TO KNOW LAW
Purpose of the law:
It’s your right to know what kind of chemicals
you are working with in a lab!!!
DELAWARE’S HAZARDOUS CHEMICAL INFORMATION ACT
Is better known as the
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A Hazard Communication is:
A written document detailing the hazards of using a particular chemical
A sign warning of the potential dangers of a particular chemical in the vicinity
The label on a container instructing one on the use of that particular chemical
Any Communication warning one of a hazard
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THE RIGHT TO KNOW LAW REQUIRES THAT YOU BE
INFORMED OF
IMMEDIATE DANGERS WHEN USING A CHEMICAL (Acute)
POSSIBLE LONG TERM HEALTH EFFECTS OF USING A CHEMICAL(Chronic)
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ACUTE EXPOSURE• Exposure to a lot of chemical
substance in a short period of time.
ACUTE REACTION• A reaction that happens right away or within minutes or hours. (Burns, rashes, nausea)
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IMMEDIATE (Acute) DANGERS WHEN USING A
CHEMICAL
Fires Explosions Irritations to the eyes or skin Burns to the skin Poisoning
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CHRONIC EXPOSURE Exposure to small amounts of a chemical
over long periods of time
CHRONIC REACTION• A reaction that occurs or builds up over a long period of time (smokers hack)
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POSSIBLE LONG TERM (chronic) HEALTH EFFECTS OF SOME
CHEMICALS
Cancer Respiratory problems Birth defects Mutations Other illnesses
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COMMON ROUTES OF EXPOSURE
• Ingestion (eat it)
• Skin / Eye Contact or “ocular” (touch it)
• Inhalation (breath it)
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HOW DO WE KNOW WHAT IS HAZARDOUS?
Label contents
(Look for one of three“signal words” Caution, Warning or Danger)
Color coding on the containers Number system on the containers MSDS - Material Safety Data Sheets
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Key Words Caution Warning Danger
These words are often followed by such words as:
•Combustible•Flammable •Explosive•Oxidizer•Reactive
•Corrosive•Poison•Irritant•Carcinogen•Toxic
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LABEL CONTENTS
Name of the chemical Chemical formula Hazard warning (3 signal words)
• Caution, Warning or Danger
Manufacturer name for further safety information if needed
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Chemical warning labels may have the following information listed:
Name of the chemical
Signal word
Hazard Statement
Precautions
Fire, Spill and leak instructions
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Chemical warning labels may have the following information listed:
Instructions in case of exposure
Antidotes
Notes to physician
Handling and storage instructions
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COLOR CODING ON CONTAINERS
RED - FLAMMABLE
YELLOW - REACTIVE
BLUE - TOXIC OR POISONOUS
WHITE - CORROSIVE OR CAUSTIC
GREEN - RELATIVELY NONHAZARDOUS
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NUMBER SYSTEM INDICATES THAT A
CHEMICAL IS
4 - extremely toxic
3 - very toxic
2 - moderately toxic
1 - irritating,
0 - not known to be toxic
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MSDS
Identifies manufacturer Gives physical properties Indicates fire and explosion hazard Identifies health hazard Gives reactivity data Indicates storage and handling procedures
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Threshold / Tolerance Limit Value (TLV)Permissible exposure Limit (PEL)
The amount of exposure that a human being can be exposed to a particular hazardous substance without adverse affects
TWA or LD 50
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Parts per million (ppm)The amount of any substancedispersed into another.
If you were to drop a 10 grams of Kool-Aid powder into a million gramsof water you would have a solution containing 10 parts of Kool-Aid to 1 million parts of water or simply just 10 ppm of Kool-Aid to water.
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Vocabulary to Know Acute Asphyxiant “C” or ceiling Carcinogen Chronic Combustible Concentration Corrosive Cutaneous Dermal
• Dilute • EPA• DOT• Flash point• Ignitable• Ingestion• Inhalation• Irritant• LD50• Lethal concentration• Lethal Dose
• Mutagen • Narcosis• Oxidation• Reactivity • Sensitizer• Solvent• Solute• Teratogen• Toxicity• Toxic• PEL• TLV
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Extra Credit Find the name of a chemical in your house. Type in FlinnSci.com Click on “safety” icon. Click on “The Flinn Material Safety Data Sheet
(MSDS) Collection”. Type in the name of your chemical correctly. Find your chemical and click on it! Maybe more
than one! Read the MSDS info. Copy the MSDS sheet and e-mail it to me @
[email protected] Bring a copy of it to class so that we can
discuss it!