How are toxic gases characterized?

Toxic gases are characterized primarily as poisonous because they have the potential to cause harm or illness to living organisms upon exposure, even at relatively low concentrations. This harmful effect can manifest through a variety of symptoms, including respiratory distress, neurological impairment, or other acute or chronic health issues.

While some toxic gases can be irritating to the respiratory system, not all toxic gases exhibit this property. Characterizing them solely as irritating would overlook the broader range of health impacts they can have. Additionally, being labeled as non-toxic directly contradicts the definition of toxic gases, as it implies that the substances do not pose a health risk. The label of explosive pertains to their physical characteristics and the potential for combustion, which is a different consideration than toxicity and does not encompass the broader implications of their harmful effects on health. Thus, identifying toxic gases as poisonous encapsulates their danger and the necessity for proper handling and safety precautions.