Which of the following materials is classified as an oxidizer?

Bromine is classified as an oxidizer because it has the ability to react with and support the combustion of other materials by providing oxygen or by increasing the rate of combustion. Oxidizers can significantly enhance fire risks and are typically defined by their capacity to release oxygen, which allows other substances to ignite and burn more intensely.

In contrast, gasoline and acetone are both flammable liquids and do not possess oxidizing properties; they are rather combustible fuels that burn in the presence of an oxidizer. Sand, on the other hand, is an inert material and does not participate in combustion reactions or act as an oxidizer. Understanding these classifications is crucial for maintaining safety protocols when handling various chemicals in laboratory settings.