Ammonium compounds found in fruit and vegetables

In fruits and vegetable products from various countries of origin heightened amounts of the active ingredients benzalkonium chloride and didecyldimethylammonium chloride were recently discovered. This chemicals belong to the group of quaternary ammonium compounds and are used in many disinfectants.

The active chemical didecyldimethylammonium chloride is also permitted in a few third world countries as an after-harvest treatment (for citrus or lychees). For instance, idecyldimethylammonium chloride is added to the water during the dipping treatment for the fruit. This could leave traces of ammonium compounds on the outside of the food, which can be avoided when used correctly. QS (Qualität und Sicherheit), a German organisation which works in food safety, has alerted its system partner in this regard that the grade of ammonium compounds should be as low as possible. All disinfectants should de used correctly. The system partners of QS have been informed of this by letter.

When the active chemicals are used as after-harvest treatment in developing countries, a maximum level of 0.01 mg/kg is permitted in the EU.