Most organic chemicals should not be washed down the drain. Place used organic chemicals and solutions in designated waste containers in the hood. Never work in the laboratory without supervision or perform unauthorized experiments. All accidents are to be reported to the instructor immediately so that appropriate action may be taken. To avoid burns, don't touch glassware or equipment that may be hot.
Hot glass looks like cold glass.
Check carefully the labels of any chemicals used. Take only what you need. Liquids should be measured in a graduated test tube so that you take no more that you need. Solids can be weighed directly from their containers. Prevent contamination of reagents.