PMC8149237_01
While camphor floats in water, both paradichlorobenzene and naphthalene will sink. In 50% dextrose, both naphthalene and camphor will float, while paradichlorobenzene will sink.
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fig1
Since the mothball sank in water, but floated in the D50 solution, it was concluded as consisting of naphthalene (Figure 1).