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Paradichlorbenzene
is frequently used in block or crystal form as a moth repellent. The
perfumed crystals are made by adding liquid perfume, little by little to the
Paradichlorbenzene which has been placed in a mixer, stirring the crystals
during the addition. Blocks are made by melting the Para dichlorobenzene and
casting into molds. Perfume is added to the mass while molten. The mixture
being stirred thoroughly. |