![]() Stuetz, Wolfgang Prapamontol, Tippawan Hongsibsong, Surat Biesalski, Hans-Konrad Polymethoxylated flavones, flavanone glycosides, carotenoids, and antioxidants in different cultivation types of tangerines ( Citrus reticulata Blanco cv. Orange peel extract has the best teeth whitening abilities tested by the method of Gass Chromatography to know the active ingredients. The highest colour level obtained from Tangerine peel’s citric acid concentration of 5%. The result of this research showed that citric acid in every kind of orange peel with various concentration has different abilities on whitening teeth. The experiments were replicated in 3 times, and teeth whiteness level was measured using Shade Guide VITA Classical. Citric acid’s ability test as teeth whitener was performed on premolar teeth with concentrations of 2.5%, 5%, and 10%. Citric acid extraction was carried out on the type of Sweet Orange ( Citrus Aurantium L), Tangerine ( Citrus Reticulata Blanco or Citrus Nobilis), Pomelo ( Citrus Maxima Merr, Citrus grandis Osbeck), and Lemon ( Citrus Limon Linn). A quasi-experimental was employed in this study. This research is conducted on a laboratory scale therefore, it needs to be developed on an application scale. Peel of citrus fruit ( Citrus reticulata) has a variety of possible chemical compounds that may serve as a potential whitening teeth. Citric acid compounds of tangerines peel extract ( Citrus reticulata) as potential materials teeth whitening
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