Final answer:
Material Safety Data Sheets (MSDS) would be the best resource to identify precautions when working with a particular chemical.
Step-by-step explanation:
The resource that would best help you identify the precautions to take when working with a particular chemical is Material Safety Data Sheets (MSDS). MSDS provide important information about the properties and hazards of chemicals, as well as safety precautions and proper handling procedures. They also contain information about disposal methods and first aid measures.