Answer :
Even if the instructor isn't there yet, you can start working in the lab as soon as you walk in.
Before entering the lab, be sure to put on a lab coat. The coat's sleeves need to be rolled down all the time.
Wear closed-toed footwear. Avoid wearing sandals and other open-toed footwear as they increase your risk of suffering foot injuries from falling objects and skin damage from potential acid spills.
Shorts and skirts expose the skin to dangerous materials, hence long pants are necessary.
When working, avoid wearing loose sleeves because they are uncomfortable.
Bun your long hair. Loose hair may ignite when using a Bunsen burner.
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