Final answer:
Manufacturers of chemicals are required by WHMIS legislation to ensure correct classification of chemicals, label containers with hazard information, and provide safety data sheets for every hazardous chemical. They must also adhere to regulations regarding the disposal of chemical waste.
Step-by-step explanation:
According to WHMIS (Workplace Hazardous Materials Information System) legislation, manufacturers of chemicals are required to provide certain information about any hazardous products they sell or produce. They have a duty to ensure chemicals are classified correctly and that their containers are labeled with appropriate hazard symbols and precautionary language. Additionally, they must create and distribute safety data sheets (SDSs) for each hazardous chemical, which detail comprehensive safety and handling information.
Furthermore, they need to make sure that the chemicals being disposed of as waste are unused and in the form of a commercial chemical product, following the United States Department of Transportation hazardous materials regulations and the EPA's hazardous waste regulations.