The European Commission has confirmed that in March 2009 it sent a Statement of Objections to a number of companies active in the heat stabilisers sector, concerning their alleged participation in a cartel in violation of EU rules on restrictive business practices (Article 81 of the EC Treaty and Article 53 of the Agreement on the EEA). Heat stabilisers, in solid or liquid form, are added to PVC products in order to improve their thermal resistance, plasticity, rigidity, transparency and protect them from discolouring. The Statement of Objections concerns two categories of heat stabilisers: tin stabilisers, and epoxidised soybean oil/esters. They are used in packaging, food packaging, credit cards, bottles, coatings, flooring, artificial leather, plastic wallpaper, and other plastic products for everyday use.