Biocidal product is defined as preparations sold in ready form to use that contains one or more active substances and has control effect, movement restriction or destruction against harmful organisms which has harmful effect on products that people use or produce or animals or environment. These substances which are composed mostly chemicals and ease our lifes are used in increasingly every areas of our life on the other hand they carry variety of risks and threaten our lives. In terms of environment and human health to minimize the risks and use effectively these products could only possible with conscious use and by providing control over these products. Harmonization projects within the scope of Turkey’s membership for EU laws and regulations were conducted by Ministry of Food, Agriculture and Livestock and Ministry of Health. However, authorization and application of some products in EU countries and Turkey, that marks the question whether borderline products that should be evaluated within the scope of biocidal product, medicinal product, veterinary product, cosmetic product or plant protection product. Agencies work in this subject needs to determine the boundary line on the need to evaluate the extent to which products which. In some cases there are difficulties on a spesific product about which EU directive should be implemented. So it is important to know what purpose and where should the product used to determine which system should be implemented. Products were evaluated according to the decisions taken in the European Commission, examples were given on this subject and study is finalized with necessity of discussion of the issue was highlighted in Turkey.