Chemicals that can cause a severe allergic reaction are classified as which category?

Chemicals that can cause a severe allergic reaction are classified as which category?

• A. Asphyxiants
• B. Sensitizers
• C. Irritants
• D. Convulsants

Answer: (B)

Chemicals that can cause a severe allergic reaction are sensitizers because they prime the immune system to react to the substance after exposure. Sensitizers may not irritate on the first contact; instead, they cause the body to become sensitized, and subsequent exposures can trigger strong immune responses, including severe allergic reactions or anaphylaxis in the sensitized individual. This is different from irritants, which cause direct tissue irritation without involving an immune sensitization process, and also distinct from asphyxiants (which affect oxygen levels) or convulsants (which can induce seizures). In practice, preventing sensitization means minimizing exposure, using proper ventilation, and donning appropriate PPE, since even small exposures can lead to serious reactions in people who have become sensitized. Examples include isocyanates, formaldehyde, and certain metals like nickel that are known to sensitize the immune system.

Chemicals that can cause a severe allergic reaction are sensitizers because they prime the immune system to react to the substance after exposure. Sensitizers may not irritate on the first contact; instead, they cause the body to become sensitized, and subsequent exposures can trigger strong immune responses, including severe allergic reactions or anaphylaxis in the sensitized individual. This is different from irritants, which cause direct tissue irritation without involving an immune sensitization process, and also distinct from asphyxiants (which affect oxygen levels) or convulsants (which can induce seizures). In practice, preventing sensitization means minimizing exposure, using proper ventilation, and donning appropriate PPE, since even small exposures can lead to serious reactions in people who have become sensitized. Examples include isocyanates, formaldehyde, and certain metals like nickel that are known to sensitize the immune system.