Which of the following materials is indicated by a flame pictogram?

The flame pictogram is utilized to signify materials that are flammable, pyrophoric, or self-heating. This includes substances that can easily ignite and potentially cause fire hazards during handling or storage. The use of this pictogram alerts workers and users to the presence of materials that require specific safety measures to prevent ignition and ensure safe handling.

Flammables are substances that can catch fire at relatively low temperatures, while pyrophorics ignite spontaneously in air at room temperature. This makes the flame symbol particularly relevant for indicating the risks associated with these types of materials, emphasizing the need for caution to avoid dangerous situations. The proper identification of such hazards plays a critical role in maintaining safety in environments where these materials are present.