What does "Warning" refer to in the context of labeling for medical gases?

In the context of labeling for medical gases, "Warning" typically refers to a legal consumer product safety warning. This label is essential as it alerts users to the potential hazards associated with the medical gas, ensuring that they are informed of risks such as flammability or the need for safe handling practices. This kind of warning plays a critical role in maintaining safety in environments where medical gases are used, such as hospitals and clinics.

Other labels serve different purposes: instructions for safe storage help with the proper management of the gas cylinders, while a sign indicating that a cylinder is empty provides operational information. Similarly, notes on expiration dates are crucial for ensuring the efficacy and safety of the gases but do not fall under the "Warning" category. Therefore, the classification of "Warning" specifically pertains to the legal obligations to inform consumers of safety considerations when handling these products.