CHEM 1212: Safety
Moisture sensitive
(no icon) USED FOR: - Moisture sensitive - Hygroscopic (absorbs wear from the air) PRECAUTIONS TO TAKE: - Keep container tightly capped; recap immediately after use - Use chemical immediately; do not let the chemical sit out in the open - Always wear Personal Protective Equipment
Lab manual and Lab notebook
- BOTH are combined into one book - ALWAYS Record directly into the notebook pages during the experiment - Follow instructions given in lab manual - Lab notebook portion is the 2nd half of your lab book - This is a scientific notebook-- not a formal lab report
Disposal methods
- Check lab manual or your TA for the appropriate disposal method - Most experiments will have waste bottle(s) in the fume hood - Some acids and bases can be poured down the drain with LOTS of running water - Paper waste and rinsed beral pipets go into the trash can - Broken glass goes into the broken glass box
Using Chemicals (good lab practices)
- Check the label to verify chemical to be added - To transfer liquids: pour from beaker, use feral pipet, or syringe - When measuring liquid chemicals from a graduated cylinder, syringe, or buret: • View volume at eye level • Read the volume at the bottom of the meniscus • Record the volume using two digits past the decimal, estimating the last digit - Record all volumes directly into your notebook
What does the Spill Kit contain?
- Chemical Absorbent Pads - Diasorb Granules - Acid Neutralizer - Dust Pan with Whisk Broom
When Finished In the Lab
- Dispose of all chemicals in appropriate manner - Clean glassware with soap and brushes at the back sink - Put away all of your glassware - Return clean common equipment to appropriate places - If hotplate was used, make sure it is off and return it to drawer - Pour water out of wash bottle before storing in drawer - Clean your lab bench area - Wash hands before leaving - Lock your lab drawer!
What are some good lab practices?
- Encourage safety - Prevent accidents - Reduce chemicals used - Reduce chemical waste - Optimize laboratory time - Boost laboratory skills
If chemical is in your eye and you are wearing contacts?
- Immediately flush eye with eye wash for a minute, the take out your contacts and resume flushing for 15 minutes - NOTIFY TA
If chemical is in your eye?
- Immediately flush your eye with eye wash for 15 minutes. Hold open your eye with your fingers so the water reaches your eyeball - NOTIFY TA
If chemical is on LARGE area of skin or clothing?
- Immediately remove contaminated clothing - Flood area with water from the safety shower for 15 minutes - NOTIFY TA (you will be given clothes before you leave the lab)
If chemical is on SMALL area of skin?
- Immediately run water for 15 minutes over that affected area - NOTIFY TA
If chemical is on YOUR FACE? (Googles are still in place)
- Immediately wash your face with water for 15 minutes- leaving you goggles on - NOTIFY TA
If you have excess chemical
- NEVER EVER pour excess chemical back into reagent - NEVER EVER pour excess chemical directly into spill tray - NEVER EVER return excess solid back into bottle/jar - SHARE excess chemical with another group or dispose of it
What to do incase of a spill?
- Notify TA immediately - Follow the instructions in the Spill Kit to dispose of the chemical in the appropriate method
In the event a person's hair or clothes catches on fire:
- Notify TA immediately - Smother the fire by covering the person with the fire blanket. NEVER use a fire extinguisher on a person! - Then have the person STOP, DROP, & ROLL
You should come to the lab prepared by:
- Reading the experiment and taking the pre-lab quiz - Understanding the experimental procedure - Preparing notebook for the experiment - Reviewing which chemicals will be used and the hazards associated with each chemical
Dispensing chemicals-- Liquids (good lab practices)
- Reagent bottles are kept at the back lab bench • NEVER remove the reagent bottles from the spill tray - Bring a small beaker to the back tray to get chemicals - Check the label of the reagent bottle • Verify that you are getting the correct chemical - Take only as much reagent as needed - Don't try to get exact amount from reagent bottle - NEVER insert anything into reagent bottle - DO NOT allow dropper ti or bottle mouth to touch your beaker or flask
During the experiment (lab notebook)
- Record all observations and measurements - Do not write it elsewhere and then copy it later!
Before coming to lab you need to know:
- what chemicals will be used - what precautions should be taken - what personal protection equipment (PPE) to wear - what to do if chemicals are on you - what to do in an emergency
Where does Excess chemicals go?
Appropriate waste container
Where does reaction mixture go?
Appropriate waste container
Where is the Sink?
At the back of the lab, on the opposite side from the fume hood
Where is the Fume Hood?
At the back of the lab, on the opposite side from the the sink
Where are the Emergency Exits?
At the rear of the lab, the connecting doors to adjacent labs
What is a Chemical Alert Table?
In the lab manual for each experiment - names & formulas of chemicals to be used - chemical hazards for each chemical
How To Use a Fire Extinguisher
P.A.S.S. • Pull the pin to unlock the handles • Aim the nozzle at the base of fire • Squeeze the handles to dispense CO2 • Sweep back and forth to put out fire
Aquatic toxicity
USED FOR: - Aquatic toxicity - Environmental hazard PRECAUTIONS TO TAKE: - Use care when handling - Do not discard down the drain or trash; must discard in appropriate waste container - Always wear appropriate Personal Protective Equipment
Corrosive (symbol)
USED FOR: - Corrosive to skin and metal PRECAUTIONS TO TAKE: - Avoid contact with skin, eyes, and clothing - Always wear Personal Protective Equipment
General health hazard; Carcinogen
USED FOR: - General health hazard - Respiratory sensitizer - Carcinogen - Organ toxicity PRECAUTIONS TO TAKE: - Use care when handling - Avoid contact with skin, eyes, or lungs - Do not breathe vapors - Do not eat or drink anything in the lab - Always wear Personal Protective Equipment (PPE)
Irritant (symbol)
USED FOR: - Irritant to skin and eyes, skin sensitizer - Toxic - Respiratory tract infection PRECAUTIONS TO TAKE: - Avoid contact with skin and eyes - Do not eat or drink anything in the lab - Do not breathe vapors - Always wear appropriate Personal Protective Equipment (PPE)
Oxidizing Agent
USED FOR: - Oxidizer - Oxidizing Agent PRECAUTIONS TO TAKE: - Avoid mixing with other chemicals except as directed - Keep chemical away from contact with skin, eyes, or clothing - Always wear appropriate Personal Protective Equipment
Severe to fatal toxicity
USED FOR: - Severe to fatal toxicity (Generally these chemicals must be ingested to become toxic) PRECAUTIONS TO TAKE: - Avoid all contact with the body - Avoid inhalation, swallowing or contact with skin - Do not eat or drink anything in the lab - Always wear Personal Protective Equipment
Flammable
USED FOR: - Flammable - Emits flammable gases - Pyrophoric PRECAUTIONS TO TAKE: - Keep chemical away from heat, sparks or flames - Keep container closed when not in use - Always wear Personal Personal Protective Equipment
When is it okay to remove your chemical splash proof goggles?
When everyone in the lab has put away all chemicals and glassware
Irritant
can cause itching, dryness, or sensitivity on skin or eyes
Lachrymator
causes eyes to produce tears
Oxidizing agent
causes other chemicals to be oxidized, reactive
Mixing incompatible wastes can cause ________________-
fires, explosions, or other hazards
Corrosive
irreversibly destroys living tissue when in contact with skin or eyes
Carcinogen
is suspected or proven to cause cancer
Toxic
may cause bodily harm through ingestion, inhalation, or skin absorption
Where is the Fire Blanket?
On the opposite side of the door from the fire extinguisher
Dispensing chemicals-- solids (good lab practices)
- Solid chemicals to be weighed are kept near the balances -Add solid to watch glass, weigh boat, or weighing paper • NEVER place chemicals directly on balance pan - Check the label of the reagent bottle - TAKE ONLY AS MUCH CHEMICAL AS NEEDED - If chemical is free flowing, simply tap the side of the bottle to skate the chemical a little at a time into container, then recap the bottle - If not, insert a clean spatula into the bottle to obtain a small amount of solid, then recap the bottle - Record all weights directly into your lab notebook
What to do incase of broken glassware?
- Sweep up broken glass and deposit it in the Broken Glass Box- NOT IN THE TRASH CAN!
What must you do before coming to the lab?
- Take the Lab Quiz - Write the Chemical Alert Table in the lab notebook - Review the chemicals and their hazards - Prepare lab notebook for the experiment - Read the experiment
Reactions Occur In:
- Test tubes - Beakers - Erlenmeye flasks • Other equipment used: - Balances - Stirring Hot plates - Vernier Labquest & probes
What is the outline for lab notebook?
- Title and purpose - Chemical alert - Data and observations - Data analysis - Discussion
After the experiment (lab notebook)
- Turn in your data sheet before leaving -At the next lab, turn in calculations, results, & discussion
Procedure (good lab practices)
- UNDERSTAND THE PROCEDURES BEING USED ASK QUESTIONS IF YOU DO NOT UNDERSTAND • When using a hot plate: - Check electrical cord for exposed wires - Do not let electrical cord touch ceramic top (HOT!) - Use as low a heat setting as possible to prevent splattering - Use a towel to remove glassware from hot plate • When using water aspirator for vacuum filtration: - Use thick-walled vacuum tubing to connect to aspirator - Break vacuum by disconnecting tubing before turning off H2O • When using ring stand, securely clamp objects and make sure ring stand is balanced
Glassware (Good lab practices)
- Wear personal Protective Equipment (PPE) - Obtain glassware needed for the experiment from lab drawer or common equipment shelves - Check your glassware for cracks or chips before use - Clean your glassware-- soap & brushes are at the back • Contamination can skew your results. if residue remains, take glassware to Stockroom for a more thorough cleaning or replacement - Label all glassware with the name or formula and concentration of the chemical it contains - Arrange glassware on lab bench so that it will not be knocked over • DO NOT PLACE ON TOP OF THE SINK PEDESTALS
Before coming to lab (Lab notebook)
- Write the title, purpose, and chemical alert table - DO NOT write the procedure steps
In the lab, it is your responsibility to prevent accidents by
- know what chemicals are being used - wearing personal protective equipment (PPE) - knowing what to do in an emergency - using good lab practices - understanding the experiment - following instructions in the lab manual and from TA - working together will keep everyone safe
Why should you close drawers when not in use?
Blocks traffic in the aisles
Where does chipped or cracked beakers go?
Broken glass box
What should you do if you spill a chemical on your lab bench?
Clean it up using the spill kit in your lab
To protect your eyes:
It is mandatory to wear chemical splash proof goggles at all times
To protect your skin:
It is mandatory to wear clothing that covers as much of your body as possible - shirt covering shoulders - jeans, scrub pants, loose fitting pants, or ankle length skirts - lab apron, or lab coat NO SHORTS, SHORT SKIRTS, LEGGINGS, TANK TOPS, MUSCLE SHIRTS OR HALTER TOPS
To protect your feet:
It is mandatory to wear shoes with a closed toe and heel; shoe material should not allow chemicals to enter • Best footwear includes: - sneakers or loafers - boots NO FLIP FLOPS, SANDALS, OPEN-TOE SHOES, CROCS, HIGH HEELS, OR SLINGS
Where is the Eye Wash Station?
Mounted on the wall by the sink
Can you eat or drink in the lab?
NO
Where is the Fire Extinguisher?
Next to the door, by the light switch
Where is the Safety Shower?
Next to the white board, on the side closest to the door
In an event of a large fire:
Notify TA immediately! The TA or you can use the fire extinguisher EVACUATE THE LAB VIA THE CLOSEST EMERGENCY EXIT
In an event of a fire in a beaker or container:
Notify TA, then cover container with a watch glass or lid to remove the oxygen
Where does used filter paper go?
Trash can
Why should you store book bag and belongings in the cabinet?
Tripping hazard if left on the floor
