Lab Safety Chemistry. Copyright © Texas Education Agency 2011. All rights reserved. Images and...

Lab SafetyChemistry

2Copyright © Texas Education Agency 2011. All rights reserved.Images and other multimedia content used with permission.

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The Purpose of Lab Safety

• Science courses are hands-on, and usually include many laboratory and/or field investigations

• Safety in the science classroom should be the number one priority of teachers, students, and parents


The Purpose of Lab Safety (continued)

• Knowledge of safe practices includes what to do if an emergency occurs in the class

• Identifying potential dangers that may occur in the classroom, labs, and field investigations could be vital to preventing accidents from happening, but only if everyone knows what to look for


General Safety Rules

• Students should– Follow all directions given by the teacher at all times– Read the instructions completely before starting the

lab– Know where all safety equipment is in the

laboratory, including but not limited to• Eyewash station• Fire extinguisher• First aid kit• Safety shower


General Safety Rules (continued)

• Students should (continued)–Work in a well-ventilated area and/or use the fume

hood at all times–Wash hands before and after labs with soap and

water– Keep their personal lab areas clean– Confirm that the lab area and all equipment is

cleaned and/or unplugged before leaving– Notify the teacher immediately of any spills or

accidents


General Safety Rules (continued)

• Students should not– Begin any lab until told to do so or without the

teacher present– Bring any food, drinks, or gum into the laboratory– Goof around or allow any horseplay in the lab


Protective Clothing and Equipment Rules

• Eyewear– Safety goggles should be worn

for the entirety of all labs– If contact lenses are worn, an

eye doctor and the teacher should be consulted before performing any labs

– Eyeglasses should never be worn in lieu of safety goggles


Protective Clothing and Equipment Rules (continued)

• Gloves– No glove can protect from all hazards– Always check for rips, tear, or holes– Assess the lab and see what type of

gloves are best for that situation• Cloth – good for light abrasives, but not

for liquids• Rubber – good for solvents and

corrosives• Leather – good for heat, sparks, and

rough abrasives


Protective Clothing and Equipment Rules (continued)

• Attire– Wear closed-toed, low, or non-heeled

shoes– Wear long pants and long-sleeved shirts

around chemicals or specimens– Wear aprons and/or lab coats during labs– Pull hair out of the way and away from

the face– Do not wear loose or baggy clothing

and/or dangling jewelry in the lab


Chemical Rules

• Do not taste or smell any chemicals in the lab, unless a teacher directs otherwise

• To smell a chemical always “waft” it – Waft – wave your hand above the

chemical towards your nose so that small amounts of vapor can be smelled without causing harm

• Make sure to clearly label all chemicals for others


Chemical Rules (continued)

• Ensure accurate use by reading the label twice before using the chemical in the lab

• Avoid contamination by not returning used chemicals back into their original container

• Dispose of chemicals using the method described on the container and/or the Material Safety Data Sheet (MSDS)


Chemical Rules (continued)

• Add acid to water, never water to acid (adding water to acid could cause acid to splash out of the container and cause harm)

• Be careful with flammable chemicals near any heat source

• Do not take any chemicals out of the lab for any reason• Keep chemical containers that are not being used closed• Notify the teacher immediately if any chemical is spilt at

any time


Glassware and Equipment Rules

• Do not use dirty, chipped, or broken glassware in the lab

• Notify the teacher immediately if/when any glassware is broken, so he or she can clean it up

• Inform the teacher of any damaged electrical equipment

• Use protective equipment when handling glassware (hot and cold glassware look similar)


Heating Substances Rules

• Never leave any heat sources unattended (whether a hot plate or a Bunsen burner)

• Never lean over a flame• Always point the open end of a heated

test tube away from yourself and others• Always use tongs or protective gloves to

handle heated glass or metal• Always make sure that long hair is pulled

back when dealing with a flame or heat


Material Safety Data Sheet (MSDS)

• MSDS’s always include – Chemical product information – Ingredients – Hazard identification – First aid measures – Firefighting measures – Accidental release measures – Handling and storage – Exposure controls/Personal protection

– Physical and chemical properties – Stability and reactivity – Toxicological information – Ecological information – Disposal considerations – Transport information – Regulatory information – Any additional information

• MSDS’s are available for every chemical (online and/or hardcopy)


Resources

• Occupational Safety & Health Administration www.osha.gov

• Texas Education Agency, Forensic Certification Training, Sam Houston State University

• Do an Internet search for the following: Flinn Scientific.

http://www.osha.gov/

Lab Safety Chemistry. Copyright © Texas Education Agency 2011. All rights reserved. Images and...

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