Did you know that the hydrosol and essential oil from the same plant contain the same constituents but often at very different ratios?
Because the hydrosol only contains about 0.05% of aromatic constituents, they are able to dissolve in this watery medium as they are partially water soluble.
Just to be clear, in the example below the actual percentage of terpinen-4-ol in lavender hydrosol 0.0075% of the total hydrosol and the percentage of linalyl acetate is 0.000025%.
We can see from this example that terpinen-4-ol has more water solubility than linalyl acetate.
Because hydrosols are 99.95% water, they are inherently safer than essential oils.
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