If you understand the following guidelines and the

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Unformatted text preview: understand the following guidelines and the reasons behind each point, you will pass the exam. Dakota State University Page 6 of 232 Safety Guidelines General Chemistry I and II Lab Manual Most of laboratory safety is common sense. Remember that this is a general guideline, and therefore may be incomplete. If you are ever unsure about safety, please ask. Laboratory Apparel (1) Safety goggles are required in the laboratory AT ALL TIMES! Splash hazards are perhaps the most significant danger present in the lab, and eyes are extremely sensitive. (2) Contact lenses are not permitted in the lab. Your goggles will protect your eyes from spill hazards, but do nothing to protect you from fumes, which can dry your contacts out and may result in the necessity of an operation for their removal. Contact lenses can also absorb chemicals from the air (especially the new “breathable” lenses), concentrate and hold them against the eye, and prevent proper flushing of the eye should a chemical be splashed into the eyes. (3) Laboratory aprons must be donned at all times. In the event of a spill, these aprons are chemical and flame resistant, and could save you from scar tissue! (4) Sandals, open-toed shoes and high heels are not permitted in the lab. This is to protect your feet from splashes and spills. The restriction on high heels is for balance. (5) Shorts or skirts cut above the knee are not permitted in the lab. Again, should a spill occur, it will be your clothing that will be your protection from direct exposure of the skin to that chemical. The idea is to put as many layers of clothing as possible between you and a chemical spill. The more clothing, the more diffuse the chemical will be by the time it reaches the skin, and the greater the chance to remove the chemical before it reaches your skin. (6) Careful consideration should be given before wearing any jewelry into the lab. Some chemicals evaporate very quickly and therefore pose relatively little danger should they get onto your skin. However, if they get beneath a ring, watch or some other form of jewelry, they can be prevented from evaporating, held against the skin longer and greatly increase the risk of injury. Should you decide to wear jewelry to the l b (as I will be wearing my watch), be particularly a mindful of itching, burning or any other irritation under or around your jewelry. (By the way, NEVER wear opals, pearls, or other "soft gems" in the lab. The harsh laboratory environment may dry them out or otherwise damage them, and neither your instructor nor DSU will replace or repair such items.) (7) Never wear clothes that hang, such as loose sleeves. Be sure ties and scarves are tucked well inside your laboratory apron. These pose fire hazards (if you are reaching or bending down near an open flame) as well as chemical hazards (if they accidentally get dragged through a chemical, they can transport that chemical directly to your skin). In fact, you may want to give very serious consideration to wearing only very old clo...
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