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SafetyIntroductionReadingWeek2 - Chemistry 211 Organic...

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Unformatted text preview: Chemistry 211 Organic Chemistry Laboratory I Safety Introduction • Dress Appropriately (for chemistry lab) Proper attire is extremely important for your own protection. Accidents will happen in the lab; there is no way to prevent them, and that is why they are called accidents. Even if you are confident in your own abilities and believe that you would never spill something, you have to remember that other people are working around you every day. Wearing appropriate personal protection equipment (PPE) will help you to avoid the spills, bumps, and contact that will naturally result from lab work. DO NOT become the statistic that everyone talks about as a lesson for wearing PPE. Remind yourself of these important rules: Long hair must be tied back. Safety Goggles must be worn at all times! Fully cover your chest, back, and shoulders. o No bare mid-sections or loose fitting sleeves. ALL “bottom” apparel must extend at least to the knee. Feet - Shoes must fully enclose the feet; o Closed Toe o Closed Sides o Closed Heel o Closed Top • Wear this Personal Protection Equipment At All Times in the lab! Yes, it is difficult to remember to wear PPE, especially since it is new to you, but it is extremely important to insure your well-being. You want to keep your eyes, you do not want to be scarred by flames or corrosive solvents. We all understand the awkwardness of wearing goggles, gloves and aprons but it is something that you need to do; you will learn to love the protection they provide. Goggles – To protect your eyes. Splash goggles with side vents protect a good portion of your face. Your neighbor might not mean to trip and spill concentrated NaOH in your face, but if you are wearing splash goggles your eyes will be protected. Get into the lab shower, and DO NOT remove the goggles. Aprons or Labcoats – To protect your body. If you are wearing appropriate laboratory attire, the apron is just adding a little additional coverage (and protecting your clothing). Aprons do not cover everything; your backside and shoulders are most vulnerable. Also, wearing cotton fibers (non-synthetic materials) will also give added protection because nylon, spandex and rayon will melt or burn when in contact with harsh chemicals. Gloves – To protect your hands. Chemistry 211 Organic Chemistry Laboratory I Nitrile gloves are supplied for everyone, but they are not invincible. If they are compromised (i.e. solvents have spilled on them or you have torn them), replace immediately. Once you have put on your gloves, be sure not to touch ANYTHING that you would not want chemicals on: your face, hair, clothes, doorknobs and public areas. Be sure to remove PPE before exiting the labs. Remember, the halls are public! Identify the Safety Equipment! On the first day of lab, you completed a scavenger hunt. Be sure to make a mental map of the locations for these safety devices: Fire Extinguisher Eyewash Safety Shower Emergency Exit • NEVER Eat or Drink in Lab Labs might seem like normal classrooms, but they are not! Food and drinks are NOT permitted in labs. Some chemicals can be fatal if absorbed through the alimentary canal (mouth, pharynyx, esophagus, stomach, small and large intestines) and eating or drinking in lab leads directly to this route. Do not chew on pens or pencils that you have handled while wearing gloves. Tasting is no longer used as a method of characterization, so do not do it. • NEVER Sniff Chemicals We have fume hoods for a reason. Breathing toxic chemicals can be just as dangerous as eating them. If you start to smell strong chemicals, tell your GSI. To get an idea about how a chemical smells, gently waft the air above the compound toward your nose. DO NOT inhale it directly. • Be Careful With Sharps In this lab you will not come in direct contact with needles or syringes, but you will use them in 216. You will, however, work with glassware that can break, cutting your or someone else. The old rule about running with scissors also applies to any sharp objects, especially the ones that could be contaminated with chemicals. Broken glass should be cleaned up carefully; your GSI should also be aware of any breakage so he or she can help with the proper cleanup. • Don't Dispose of Chemicals Down the Drain Follow proper waste disposal guidelines. Directions for proper disposal are posted on the waste hood. Each container needs to be labeled correctly. If you do not know where something goes, ASK YOUR GSI. Chemistry 211 Organic Chemistry Laboratory I White Buckets – Solid waste Gloves, pipettes, vials, excess reagents, etc. Halogenated: Any halogen present. • e.g., Methylene Chloride, Chloroform Non-Halo: Other organic solvents. • e.g., Ethyl Acetate, Hexanes Corrosive: Acidic/basic solutions. • e.g., 1M HCl, 1M NaOH Metals: Salt solutions. • e.g., Copper (II) nitrate, iron (II and III) nitrate Toxic: None of the above • e.g., anilines, phenols 1 Gallon Bottles – Liquid waste Solids in solvent – Decant off the solvent into appropriate liquid waste. Dispose of solid in white bucket. Solvent with layers – Separate each layer into appropriate liquid waste. Halogenated Waste- Any compound or solvent that has a halogen present (F, Cl, Br, I) should be disposed of in the halogenated waste. Finally, there is another rule that you should understand very well… • Take Data During Lab To protect the authenticity of your data, write all notes and observations and analysis directly in your lab notebook during lab! Do not write it on a paper towel and then re-write it. Do not take it home and try to recall what you did. When you are working in groups, do not trust your neighbor to take detailed notes – write your own version of what you did. This is an individual lab class, you are responsible for your own work and for the accuracy of your results, whether or not they were collected as part of a team. Your notebook documents everything that you have done (individually or as part of a group), and primary data, directly recorded, is the only valid and reliable source of information about your work. Adapted from: Hill Jr., Robert, H.; Finster, David C. “Laboratory Safety for Chemistry Students” John Wiley & Sons, Inc. Hoboken, New Jersey, 2010. http://chemistry.about.com/ ...
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