Which type of chemical is known to cause respiratory failure due to the body’s inability to utilize inhaled oxygen?

Chemical asphyxiants are substances that interfere with the body's ability to use oxygen effectively. Unlike simple asphyxiants that displace oxygen in the air, chemical asphyxiants specifically hinder the biochemical processes that are essential for oxygen utilization at the cellular level. For instance, carbon monoxide is a well-known chemical asphyxiant that binds to hemoglobin in the blood, preventing oxygen delivery to tissues, leading to respiratory failure.

In contrast, carbon dioxide, although it can cause suffocation at high levels, does not primarily inhibit the use of oxygen within the body. Flammable gases are hazardous primarily due to their potential to ignite and cause fires or explosions, rather than directly affecting oxygen utilization. Oxidizers can support combustion and increase the intensity of fires but do not directly impact how the body uses oxygen.

Thus, the selected option accurately represents the type of chemical that can result in respiratory failure by obstructing the essential processes for oxygen utilization in the body.