What critical information must warning labels on hazardous chemical containers include?

Warning labels on hazardous chemical containers must include critical information that allows users to safely handle these substances. One key aspect is the inclusion of manufacturer contact details. This information is essential because it provides users with a direct point of contact for inquiries regarding the chemical, including safety data sheets, emergency procedures, or handling instructions. Knowing how to reach the manufacturer is vital, especially in emergency situations or when questions about the chemical's properties arise.

While options like expiration dates, disposal instructions, and color coding can be important for specific contexts, they are not universally required on all hazardous chemical labels. The primary purpose of a warning label is to communicate safety information effectively, and having the manufacturer's contact information ensures that users have access to comprehensive guidance related to the chemical's use and potential hazards.