Lexikon

a senzitiezer is a dangerous chemical substance that causes a substantial proportion of exposed people or animals to develop an allergic reaction in normal tissue after repeated exposure to the chemical substance. Certain sentisizers have no immediate health effects. But if an organism is exposed to them several times, an allergic reaction may arise. A sensitizer may make an organism sensitive to other chemicals too, often quite suddenly. Typical reactions to sensitizers can include skin disorders such as eczema, respiratory disorders such as asthma, skin irritation (ulticaria), etc. Being under the effect of a sensitizer is also called hypersensitivity.

Sensitization is an immune response. Therefore, some people may be easily sensitized while others may never be affected. Like any allergic response, a reaction to a sensitizer can be fatal in rare circumstances. You can not predict your reaction to sensitizing chemicals, so treat all sensitizers with great respect and follow proper chemical safety and hygiene procedures.