<![CDATA[Chalcone compounds and their derivatives are known to have various pharmacological activities, one of which is antibacterial activity. This activity is strongly influenced by the type of bound substituent and the location of the substituent on the structure of the chalcone compound. The purpose of this study was to synthesize chalcone compounds with the characteristics of the dimethylamino substituent on ring B at the para ((E)-3-(4-(dimethylamino)phenyl)-1-phenylprop-2-en-1-one) position and to test the activity of an antibacterial compound of chalcone against bacterial isolates of blood product contaminants. Antibacterial activity testing was focused on bacterial isolates derived from blood products, because the use of blood product bacterial isolates for antibacterial testing was still not widely used, generally the test bacteria used were ATCC bacterial isolates. The antibacterial activity test method used was the paper disc diffusion method, the antibacterial activity of chalcone compounds was known through the formation of a clear zone around the disc paper called the inhibition zone for bacterial growth. The chalcone compound (E)-3-(4-(dimethylamino)phenyl)-1-phenylprop-2-en-1-one was successfully synthesized through a condensation reaction, which obtained a yellow crystalline solid with a yield of 81.67%. The results of the activity test of chalcone compounds on several blood product contaminants showed that this compound had good enough activity in inhibiting the growth of Staphylococcus aureus bacteria with an inhibition zone of 8.9 mm at a concentration of 25 ppm.]]>
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