What is the main hazard associated with highly toxic substances?

The main hazard associated with highly toxic substances is the potential for immediate health effects. These substances can cause severe reactions shortly after exposure, impacting the respiratory system, skin, or other vital organs. Highly toxic materials often demonstrate acute toxicity, meaning they can lead to rapid and serious health issues, such as poisoning, neurological damage, or even fatality, depending on the level and route of exposure.

Immediate health effects are critical to consider in the context of highly toxic substances because the faster a person experiences symptoms, the sooner they require medical attention. This characteristic differentiates highly toxic substances from those that may present risks over longer periods, such as long-term exposure risks associated with environmental damage or chronic health issues. Understanding this helps in implementing appropriate safety protocols and response measures to protect individuals who might encounter these hazardous materials.