Which group of chemical agents is characterized by lethal and toxic effects?

The group classified as Group A is associated with lethal and toxic effects from chemical agents. This designation typically includes substances that have a high potential to cause harm or fatality upon exposure. These agents are often used in contexts where immediate and severe impacts are anticipated, making the understanding of their properties critical for safety and handling.

Chemical agents categorized in Group A are typically monitored and regulated more stringently due to their inherent dangers. They can pose significant risks in various applications, including military, industrial, and emergency response scenarios. Recognizing these agents is vital for ensuring safety protocols are followed and proper protective measures are in place, thereby minimizing the potential for accidental exposure or intentional misuse.

On the other hand, the other groups do not represent the same level of hazardous impact, focusing instead on agents with different toxicity profiles or effects that may not be as immediate or severe. Understanding these classifications is essential for professionals dealing with hazardous materials, as it informs their response strategies and enhances overall safety.