birch tar oil

Pyroligneous oil obtained by the dry distillation of the wood of Betula alba and rectified by steam distillation; used externally in the treatment of skin diseases. SYN: birch tar.

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a pyroligneous oil obtained by dry distillation of the bark and wood of various birches (genus Betula), especially B. alba, rectified by steam distillation; used topically in the treatment of eczema and other dermatitides.

Medical dictionary. 2011.

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