What does a precautionary statement on a label warn about?

A precautionary statement on a label serves to inform users about potential hazards associated with the product, particularly concerning safety and health risks to humans, animals, and the environment. This statement is designed to help users take the necessary precautions to prevent harm when handling the product. It may include warnings about toxicity, flammability, corrosiveness, or other risks, guiding users on how to protect themselves and the environment effectively.

The other options, while relevant to product labeling, do not describe the primary purpose of a precautionary statement. For instance, chemical composition refers to the specific ingredients and their proportions, recommended storage conditions provide guidance on how to maintain the product safely, and the expiration date indicates how long the product remains effective or safe to use. None of these aspects are encapsulated in the function of a precautionary statement, which specifically focuses on safety warnings.