Handling expired chemicals requires extreme caution, as they may be hazardous or no longer safe to use. Here are some tips: 1. **Safety First**: First, make sure you wear appropriate personal protective equipment (such as gloves, goggles, and masks) and work in a well-ventilated area. 2. **Check the ingredients**: Learn the specific ingredients of these chemicals and check their properties and potential reactions. Some chemicals may cause dangerous reactions, so they need to be handled with caution. 3. **Consult a Professional**: Before trying to synthesize anything, it is best to consult a professional chemist or an expert in the relevant field to ensure safe and correct handling. 4. **Legal Disposal**: Some areas have strict laws regarding the disposal of expired chemicals. Check and follow local regulations to ensure legal disposal. 5. **Educational Use**: If the chemical is safe to use, you can consider using it for educational purposes, such as conducting experiments, but be sure to do it under the guidance of a professional. Be sure to prioritize safety and legality and do not try synthesis reactions casually.