Which class of hazardous materials would likely include toxic chemicals that pose health risks?

The appropriate category for toxic chemicals that pose health risks is Class 6, which is specifically designated for toxic and infectious substances. This class encompasses materials that can cause harm to human health through various exposure routes, such as inhalation, ingestion, or skin contact. Examples in this classification include poisons and certain biological materials that can lead to infections or other health issues. Therefore, Class 6 is focused on substances that have significant health hazards, making it the correct classification for toxic chemicals.

In contrast, Class 1 refers to explosives, which are primarily concerned with materials that can react violently under certain conditions. Class 2 encompasses gases, including flammable and non-flammable gases but is not specifically focused on toxicity. Class 5 relates to oxidizers and organic peroxides, which may enhance combustion but do not inherently indicate toxicity like Class 6 does. Thus, Class 6 is the most relevant classification when considering health risks associated with toxic chemicals.