Keep aisles free of obstructions such as chairs, stools, boxes, and waste receptacles. No apparatus or laboratory equipment should be placed on the floor. Avoid slipping hazards . Clean up ice, stoppers, glass beads, and other small items from the floor. Clean up all spills - both of liquids and of solids.
Equipment is available.
Use only equipment that is free of flaws such as cracks, chips, frayed wire, and obvious defects. Replace all defective glassware at the stockroom. Apparatus attached to a ring stand should be positioned so that the center of gravity of the system is over the base and not to one side or behind the base. Most chemicals are harmful to some degree. Avoid direct contact with any chemical.