What type of label information must not contradict standardized information?

The correct choice highlights that supplemental label information must not contradict standardized information to ensure clarity and safety in the communication of hazards. Supplemental information is intended to provide additional context or details that support standardized information, which encompasses essential components such as the product identifier, hazard statements, and precaution statements. Standardized information is developed to maintain consistency across products, facilitating understanding regardless of the user's familiarity with the product or its associated hazards.

When supplemental label information conflicts with the standardized information, it could lead to confusion and potentially unsafe practices, which is why it is critical that these elements align. This is especially important in a medical laboratory context, where clear communication about hazards and proper handling of substances is vital to ensuring the safety of laboratory personnel and the integrity of tested samples.