Health and Safety in the Laboratory This PPT was Revised from material that were produced under grant number SH-17035 -0860 -F-11 from the Occupational Safety and Health Administration, U. S. Department of Labor. These materials do not necessarily reflect views or policies of the U. S. Department of Labor, nor does mention of any trade names, commercial products, or organizations imply endorsement by the U. S. Government.
Picture of my certificate here…. . 2
Learning Targets • • After today’s lesson, you will know: Health & safety measures our classroom has in place How best to protect yourself from harm and hazards Understand the protocols for responding to lab emergencies and locations of safety equipment Successfully complete & pass a MSDS activity & test 3
Laboratories in the News Two dozen fire departments responded yesterday to Rocky Point High School after a science teacher was burned when a chemical reaction in a science lab touched off a small explosion. The teacher, Anthony Nobre, 26, of Medford, suffered burns over his arm, neck and face. He was taken to University Hospital in Stony Brook, where he was listed in satisfactory condition, according to a spokeswoman. The blast erupted as Nobre put crystallized sodium into a container holding a small amount of water. The Brookhaven fire marshal was conducting an investigation and recommended that the building be closed today. I don’t want to be in the news for issues like these! Detroit’s Miller Middle School will be closed today and possibly Wednesday while health and environmental officials finish cleaning up a small amount of mercury that students spilled in a science class just before school was dismissed Monday. Students apparently were playing with about an ounce of the toxic substance in a sealed vial when it spilled, said a district spokesman Stan Childress. About 30 students and a teacher were present, he said. There is a possibility that students may have tracked through the mercury because some beads of the substance were found in the hallway, Childress said. 4
Why All the Fuss? Exposure to Hazardous Chemicals Can Result in acute or chronic health effects v Acute – occurring within hours or days of exposure v Chronic – occur after exposure over many years Watch these three real lab safety related accidents on a lighter note and for review… 5
• Classroom Clutter- backpacks should be left in foyer or locker on lab days, keep lab counters clean and clear, all experiments should be labeled • Locate all Local Ventilation • Locate Safety Equipment- Scavenger Hunt? • Chemical Substitutions- Green Chemistry • Lab Safety Gear 6
(PPE) stands for? ? Locate, Label, and Store your Minimum Recommended PPE: • Chemical Resistant Gloves • Goggles, • Lab Apron when Necessary 7
Personal Protective Equipment(PPE) Locate, Label, and Store your Minimum Recommended PPE: Chemical Resistant Gloves, Goggles, Lab Coat and/or Lab Apron when Necessary 8
You Have the Right to Know! When in use-- during investigations and experiments. ALL BEAKERS & other glassware should be LABELED ALL chemical Containers Must be Labeled With Chemical Name & Physical/Health Hazards Name & Address of the Manufacturer & Emergency Contact Numbers 100 Main St. , Philadelphia, PA 1 -800 -555 -1212 9
Types of Labels 10
Material Safety Data Sheets (MSDS) An MSDS is on File & Available for Each Chemical in this Lab- SEE MSDS binder, Flinn references and CD’s!!. . . or go on-line An MSDS lists: – – – – Product Identity Hazardous Ingredients Physical Data Fire & Explosion Hazard Data Reactivity Data Health Hazard Data Precautions for Safe Handling & Use Control Measures Lab Safety Training Activity -MSDS Use 11
Material Safety Data Sheets (MSDS)
What is a MSDS? • MUST be Accessible to EVERYONE • Must be current • Must be made available in the event of exposure
Material Safety Data Sheets • MUST be Accessible to EVERYONE • Must be current • Must be made available in the event of exposure
DEFINITIONS (1)? F: ANY substance easily ignited and quick burning, including liquids with a flash point below 95 degrees Fahrenheit. (2)? T: ANY substance (alone or via chemical reaction) able to cause harm/produce injury to the body through absorption, ingestion, inhalation, or injection. (3)? C: ANY substance able to burn, damage or destroy organic tissue by chemical reaction; Corrosive.
DEFINITIONS Flammable: ANY substance easily ignited and quick burning, including liquids with a flash point below 95 degrees Fahrenheit. Toxic: ANY substance (alone or via chemical reaction) able to cause harm/produce injury to the body through absorption, ingestion, inhalation, or injection. Caustic: ANY substance able to burn, damage or destroy organic tissue by chemical reaction; Corrosive.
Pictograms Know your safety Symbols….
Definition cont’d Lethal Dose 50 (LD 50) is the amount of a substance that, when administered by a defined route of entry (e. g. oral or dermal) over a specified period of time, is expected to cause the death of 50% of a defined animal population.
Definition cont’d Lethal Concentration 50 (LC 50) is the amount of a substance in air that, when given by inhalation over a specified period of time, is expected to cause the death in 50% of a defined animal population.
READING THE MSDS ò I? ? ? The chemical name, trade name and manufacturers name, address and emergency phone number can be found here. – I? ? Includes: substance, % content, CAS Number, Classification, EINECS…what’s in it – H? ? ? Identification Dangers for humans and the environment – F? A? gives instructions on what to do in case of eye contact, skin contact or ingestion
READING THE MSDS ò Identity The chemical name, trade name and manufacturers name, address and emergency phone number can be found here. – Ingredients Includes: substance, % content, CAS Number, Classification, EINECS – Hazards Identification Dangers for humans and the environment such as: Most important hazards & Specific hazards ò First Aid gives instructions on what to do in case of eye contact, skin contact or ingestion
ò READING THE MSDS cont’d ò – Fire Fighting Suitable extinguishing media, Unsuitable extinguishing media, Special hazards in fire, Required special protective equipment for fire-fighters ò Accidental Release Measures/Spill Clean-up Personal precautions, Environmental precautions, Methods for cleaning ò Handling and Storage Exposure Controls and Personal Protection Information on proper PPE to use, how to store and temperature limits
READING THE MSDS cont’d – Physical and Chemical Properties Appearance, Odor, p. H, Boiling point, Melting point, Flashpoint, Explosive properties, Vapor pressure, Relative density, Solubility – Stability and Reactivity Conditions to avoid, Materials to avoid, Hazardous decomposition products – Toxicology Acute toxicity, Local effects. Excessive exposure may affect human health as follows: Skin contact, Eye contact, Inhalation/ingestion. – Ecological Information Lists any dangers to the environment ò Disposal Lists any special disposal methods – “ 26 b”? ?
“MSDS” Training Activity Make a chart with the following information: for each substance at your lab station record the following information using the MSDS 1) Chemical name AND formula 2) Health Hazards & other conditions to avoid 3) Safety Equipment required-PPE 4) Disposal 5) First Aid in the event of accidental release or exposure **every lab report must include a MSDS
http: //www. flinnsci. com/msds-search. aspx NO EXCUSES- be safe and find the information you need for your prelab safety before beginning any investigation
How to Be Prepared for Small Incidental Spills… v v Proper Incidental Spill Control Equipment Includes: LOCATE @ each lab station Spill Control Materials Spill Control Pads Brooms, Pails & Bags Absorbent – Diatomaceous Earth Neutralizers – for Acids & Alkalis 26
Name this Chemical Hazards and Symbols • ? ? ? • Irritant • ? ? ? • El NSF North Mississippi GK-8
Other Chemical Hazards and Symbols • Flammable • Irritant • Explosive • Corrosive • Toxic/Poison • Environmental NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Flammable – Any substance that will burn if exposed to ? ? ? • Explosive – A substance that may ? ? if exposed to heat or flame. NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Flammable – Any substance that will burn if exposed to an open flame. • Explosive – A substance that may explode if exposed to heat or flame. NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Toxic/Poison – A substance that can lead to death if ? ? • Corrosive – A substance that can destroy or burn ? ? NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Toxic/Poison – A substance that can lead to death if inhaled, ingested, or absorbed by the skin. • Corrosive – A substance that can destroy or burn living tissue and can eat away at other materials. NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Irritant - A substance that causes inflammation upon contact with ? ? . • Environmental - Substances that are harmful to the ? ? . They must be disposed of properly, not washed down the drain. NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions • Irritant - A substance that causes inflammation upon contact with skin or mucous membranes. • Environmental - Substances that are harmful to the environment. They must be disposed of properly, not washed down the drain. NSF North Mississippi GK-8
Accidents and Injuries • Report ALL accidents and injuries to your teacher immediately!!! • Be aware of safety hazards associated with each chemical you use. • Eye accident – Wash the eye with copious amounts of water for at least ? ? min. • Fire Burns – Stop, Drop, and be covered with a fire blanket or soaked with water. Do not remove clothing stuck to victim. Get medical attention immediately.
Accidents and Injuries • Report ALL accidents and injuries to your teacher immediately!!! • Be aware of safety hazards associated with each chemical you use. • Eye accident – Wash the eye with copious amounts of water for at least 15 min. • Fire Burns – Stop, Drop, and be covered with a fire blanket or soaked with water. Do not remove clothing stuck to victim. Get medical attention immediately.
Waste Disposal • First ask your teacher where/how to dispose of waste. • Never pour anything down the drain unless you are told to do so. • A waste bottle will be supplied for substance that cannot go down the drain
Reasons for proper waste disposal • Hazardous chemicals down the drain can lead to pollution of ground water, lakes, rivers, etc. • Plants and animals will die if they are exposed to hazardous chemical waste. • Serious health problems will become present in people if hazardous waste finds its way into drinking water. NSF North Mississippi GK-8
Pictograms Practice 1? 2? 3? 4? Pesticide Education Program
Pictograms Practice Pesticide Education Program
Pictograms • Guess…. Pesticide Education Program
Pictograms • Health Hazard – – – Carcinogen Respiratory sensitizer Reproductive toxicity Target Organ toxicity Mutagenicity Aspiration toxicity Pesticide Education Program
Pictogram • Guess…. Pesticide Education Program
Pictogram • Flame – – – Flammables Self-Reactives Pyrophorics Self-Heating Emits flammable gas Organic peroxides Pesticide Education Program
Pictograms • Exclamation Mark – Guess…. . Pesticide Education Program
Pictograms • Exclamation Mark – – – Skin and eye irritant Skin sensitizer Acute toxicity Narcotic effects Respiratory tract irritant Pesticide Education Program
Pictograms • Gas Cylinder – ? ? • Flames Over Circle – ? ? Pesticide Education Program
Pictograms • Gas Cylinder – Gas Under Pressure • Flames Over Circle – Oxidizer Pesticide Education Program
Pictograms – Corrosion • Corrosives – Skull and Crossbones – ? ? Pesticide Education Program
Pictograms – Corrosion • Corrosives – Skull and Crossbones – Acute Toxicity (Severe) Pesticide Education Program
Pictograms • Exploding Bomb – Explosives – Self-Reactive – Organic peroxides Pesticide Education Program
Pictograms • ? ? ? Pesticide Education Program
Pictograms • Environment – Aquatic Toxicity Pesticide Education Program
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