From the peel of the fresh fruitthe sweet oil from Citrus aurantium and the bitter oil from C. bigaradia. Both are used for flavouring purposes. The sweet oil exhibits a sp. gr. of trom o847 to o85i; optical rotation, + 97 degrees to ioo degrees, and refractive index, 14710 to 14742. The bitter oil: sp. gr., 0852 to 0856; optical rotation, + 90 degrees to 940; and refractive index, 14730 to 14770.
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