Work only at your assigned lab station, and do only the experiments assigned by the instructor. Unauthorized experiments are prohibited. Treat all chemicals as hazardous as a matter of habit. Check labels carefully to be sure you have the right bottle. Never taste anything.
Hot glass looks just like cold glass.
Try not to touch your eyes, nose, or mouth unless you know your hands are clean. Keep your work area tidy and your equipment clean. Leave unnecessary items like backpacks and jackets in the class area up front. Discard solid chemicals in the waste jar at the front of the room and solutions down the drain, unless otherwise instructed. Never discard any solid material in the sink.