What term is used for substances that cause allergic reactions after repeated exposure?

• A. Carcinogens
• B. Chronic irritants
• C. Sensitizers/allergens
• D. Acute toxins

Answer: (C)

The term used for substances that cause allergic reactions after repeated exposure is "sensitizers" or "allergens." These substances elicit an immune response in individuals who have become sensitized to them through prior exposure. Once someone has developed a sensitivity, subsequent exposures can lead to allergic reactions, which may manifest as various symptoms such as skin rashes, respiratory issues, or other immune responses. Understanding this concept is crucial in hazardous materials management to implement proper safety measures for individuals who may encounter these substances in their work environment.

In this context, carcinogens refer to substances that can cause cancer, chronic irritants are typically related to substances that cause long-term irritation or damage rather than an immune response, and acute toxins are substances that cause harmful effects shortly after exposure rather than through a sensitization process. These distinctions underline why sensitizers/allergens are specifically linked to allergic reactions upon repeated contact, while the other categories pertain to different health hazards.