According to the Hazard Communication Standard (HazCom), all of the following must be included on chemical labels except:

• A. The manufacturer's contact information
• B. The chemical's hazard pictograms
• C. Precautionary statements
• D. The chemical's expiration date

Answer: (D)

Verified step by step guidance

1. Understand that the Hazard Communication Standard (HazCom) requires specific information to be included on chemical labels to ensure safety and proper handling.
2. Identify the mandatory elements on a chemical label according to HazCom, which typically include the manufacturer's contact information, hazard pictograms, and precautionary statements.
3. Recognize that while the manufacturer's contact information provides a way to reach out for more details or in case of emergency, hazard pictograms visually communicate the type of hazard, and precautionary statements give instructions to minimize risks.
4. Note that the chemical's expiration date is generally not a required element under HazCom labeling requirements, although it may be important for inventory or safety management in other contexts.
5. Conclude that the correct answer is the chemical's expiration date, as it is not mandated by the Hazard Communication Standard to appear on chemical labels.