To prevent accidents, long hair should be tied back and all unecessary books should be stored. Some dyes stain the skin and clothing and certain chemicals can make holes in clothing. A lab coat and sometimes gloves or goggles will protect skin and clothing. Do not carry tubes or bottles by their lids. All sharps must be deposited in the sharps containers.
Hot steam can burn.
Know the location of the safety equipment. Above all, if you are uncertain of a procedure or how to handle the equipment, ask your instructor.