This oil is produced by fractional distillation of the camphor - free oil, filter pressed from the crude camphor oil. The latter is a natural oil, steam distilled from the wood of the Hon-Sho camphor tree.
The white camphor oil fraction amounts to about 6% of the total oil, or 20% of the camphor-free ('de-camphorized') oil.
Along with the crude oil a solid, partly crystalline mass of crude camphor is extracted. The essential oil is separated from the crude camphor by filter pressing.
White Camphor - the light fraction containing cineole and monoterpenes. It also has the lowest boiling point and does not contain any safrole.
Precautions:
White Camphor preparations should not be used in facial regions of infants and small children especially around the nasal area.
As long as White Camphor essential oil does not contain safrole it is relatively non toxic, non sensitizing and non irritating.
However, the camphor content of white camphor suggests that it is convulsant and neurotoxic.
Ref:
Steffen Arctander, Perfume and Flavor Materials of Natural Origin
Salvatore Battaglia, The Complete Guide to Aromatherapy
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