Which of the following is NOT considered a hazardous material?

Non-toxic materials are not classified as hazardous materials because they do not possess the properties that make substances dangerous to health or the environment. Hazardous materials typically present risks such as toxicity, flammability, corrosiveness, or explosiveness. In contrast, non-toxic materials lack these harmful characteristics, making them safe for handling and use without special precautions.

Gases under pressure, corrosive substances, and explosive materials all exhibit hazardous traits that can pose serious threats in various scenarios, thereby categorizing them as hazardous materials. In contrast, non-toxic materials are generally safe for the public and the environment, which is why they do not fall into the hazardous materials category.