If a substance readily provides oxygen to support combustion, its hazard class is designated as:

If a substance readily provides oxygen to support combustion, its hazard class is designated as:

• A. Flammable gas
• B. Corrosive solid
• C. Oxidizer
• D. Explosive

Answer: (C)

Oxidizers are substances that readily provide oxygen or otherwise promote the oxidation of other materials. This capability makes fires burn more vigorously, even if the substance itself isn’t flammable. In hazard communication, anything that can supply oxygen to fuel a fire is designated as an oxidizer because its main danger is enhancing combustion and potentially triggering violent reactions with fuels or reducing agents. This differs from a flammable gas, which is a material that forms flammable mixtures with air and can ignite and propagate flames on its own. It also differs from a corrosive solid, which damages materials or tissue through chemical corrosion, not by promoting oxidation. And it’s not an explosive, which involves a rapid, violent release of energy. The defining risk here is the ability to supply oxygen and support combustion, so the appropriate designation is oxidizer.

Oxidizers are substances that readily provide oxygen or otherwise promote the oxidation of other materials. This capability makes fires burn more vigorously, even if the substance itself isn’t flammable. In hazard communication, anything that can supply oxygen to fuel a fire is designated as an oxidizer because its main danger is enhancing combustion and potentially triggering violent reactions with fuels or reducing agents.

This differs from a flammable gas, which is a material that forms flammable mixtures with air and can ignite and propagate flames on its own. It also differs from a corrosive solid, which damages materials or tissue through chemical corrosion, not by promoting oxidation. And it’s not an explosive, which involves a rapid, violent release of energy. The defining risk here is the ability to supply oxygen and support combustion, so the appropriate designation is oxidizer.