Zoology 1052 lab practices
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POTENTIAL HAZARDS, PRECAUTIONS AND LAB PRACTICES

ZOOLOGY 1052

 

In Zoology 1052 labs, we use both live and preserved specimens. Most preserved specimens (in general, not only in this lab) are preserved in formalin, isopropyl or ethyl alcohol, or various substances containing ethylene glycol and propylene phenoxytol. These substances, especially formalin, are hazardous to varying degrees. The complete Material Safety Data Sheets (MSDS’s) for all these chemicals are stored in the Biology Stockroom, and you are welcome to read them if you wish. However, general safety precautions and general laboratory practices when handling preserved specimens include the following:

 
1. Wear safety glasses and do not wear contact lenses. (Wearing safety glasses will prevent any possibility of chemicals splashing into your eyes. It also lessens any eye irritation from formalin vapors. If any preservative does get in the eye, rinse the eye thoroughly with water.) See #3, below.

2. Wear appropriate gloves and lab coat. Wearing of gloves while dissecting or otherwise working with preserved specimens, especially those preserved in formalin, is probably the most common and important of these precautions. It is strongly recommended you use gloves when handling preserved specimens. Formalin goes through latex gloves; the blue gloves sold at Kiva Book Store provide sufficient protection from formalin and are recommended for members of this class. Wearing of lab coats is probably not necessary in this class. In any case, if your skin contacts formalin, you should wash your hands (or other contact areas) well with soap and water.

3. Work in a well-ventilated area. Our lab room is well ventilated. Additionally, specimens we use are small and therefore do not produce much formalin vapor. Protective safety glasses used to to prevent eye irritation from formalin vapors are probably not necessary.

4. There should be no eating or drinking (or food or beverages) in lab.

5. After dissection, preserved specimens should be disposed of in the preserved specimen hazardous waste container in lab, and dissecting trays should be rinsed, dried and returned to their normal storage area.

6. Remove your gloves (or at least the one on the hand you will use) BEFORE touching water faucet handles, door knobs, cabinet and drawer handles, microscopes or any parts on microscopes, and any other general surfaces, to prevent contamination of those surfaces. If you have toxins, etc., on the outside of your gloves, and turn on, for example, a water faucet while you have those gloves on, then that faucet handle will be contaminated with those toxins, and whoever uses the faucet later, has a good chance of becoming contaminated with the toxins your gloves were protecting you from. You wouldn't want to be the next person to use that faucet after someone else contaminated it; no one else does either. Feel free to explain your objection to others if you see them practicing bad laboratory habits in this respect, also.

7. In general, gloves and lab coats should remain in the lab, i.e., remove them before going to the bathroom, stockroom, another lab, etc.

I have read and understand the potential hazards, precautions and practices. discussed in "Potential Hazards, Precautions and LabPractices:Zoology 1052"

 

 

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