What information must be present on a chemical label?

The presence of the full chemical name, hazard statement, and signal word on a chemical label is essential for ensuring safety in laboratory and industrial settings. The full chemical name allows users to easily identify the substance, reducing the risk of misuse or accidental exposure to hazardous materials.

The hazard statement provides crucial information about the nature of the hazards associated with the chemical, such as its flammability or toxicity. This helps individuals working with the substance to take necessary precautions and implement appropriate safety measures.

The signal word, which can be either "Danger" or "Warning," indicates the severity of the hazard. This instantly communicates the level of risk to anyone handling the chemical, promoting immediate awareness and caution. This information is critical for safe handling, storage, and emergency response, making it a fundamental requirement on chemical labels.

While the other options may contain useful information in specific contexts, they do not encompass the essential safety details that chemical labels are mandated to provide according to regulatory standards. Therefore, option B is the most comprehensive and pertinent choice regarding the required information on a chemical label.