All of the following information is mandatory on chemical container labels except:

• A. Manufacturer's name
• B. Date of purchase
• C. Hazard warnings
• D. Chemical name

Answer: (B)

Verified step by step guidance

1. Understand that chemical container labels are designed to provide essential information for safe handling and identification of the chemical.
2. Identify the typical mandatory information required on chemical labels, which usually includes the chemical name, manufacturer's name, and hazard warnings.
3. Recognize that the date of purchase is not typically required on chemical container labels because it does not directly affect safety or identification.
4. Recall relevant regulations or standards such as OSHA's Hazard Communication Standard (HCS) which specify mandatory label elements.
5. Conclude that among the options given, the date of purchase is the information that is not mandatory on chemical container labels.