1. Essential oils
First of all, it's worth recalling what is meant by the term "essential oil". Several definitions coexist, differing according to the type of use (pharmaceutical, aromatic, cosmetic, etc.).
According to the standard
ISO 9235
An essential oil is defined as "a product obtained from a raw material of plant origin, after separation of the aqueous phase by physical processes, either by steam distillation, or by mechanical processes from the epicarp of Citrus...
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Essential oils