Which of the following is a key element of WHMIS labels?

A key element of WHMIS (Workplace Hazardous Materials Information System) labels is the use of symbols indicating hazards. These symbols are designed to quickly convey the type of hazard associated with the material, such as being flammable, toxic, or corrosive. The visual nature of these symbols allows for immediate recognition and understanding, which is crucial for maintaining safety in the workplace.

WHMIS labels are standardized, ensuring that anyone who comes into contact with hazardous materials can easily identify the risks involved. This system helps to promote safe handling and use practices by providing essential information at a glance.

Other elements, such as color coding according to weight or expiration dates, are not relevant to WHMIS labels, while the manufacturer's phone number may be included as additional information but is not a primary feature of the hazardous communication that WHMIS labels provide. The central focus remains on the symbols, which serve as a universal language for indicating various hazards.