Allergy (Greek: allos – other + ergos – reaction) is an excessive, abnormal reaction of the immune system to substances present in the environment and foreign to the body, known as allergens, which the body should normally ignore. Allergy is a problem for a large part of society today. It can cause discomforts that make it very difficult for the body to function normally. Therefore, the producers of raw materials and finished products are introducing products containing no allergens. The PCC Group’s portfolio also includes chemicals marked with the pictogram “Does not contain allergens”. These are chemical substances that do not contain common ingredients classified as sensitizing. The guarantee of no allergens allows consumers to use the products without concern of undesirable side effects.