Hydrosols are aromatherapy products which are co-produced with essential oils during steam distillation of plant material. Hydrosols are the hydrophyllic or water-soluble constituents of the plant and essential oils are the lipophyllic or oil-soluble parts of the plant. When distillation is complete the essential oil and hydrosol emerge separated with the essential oil floating on top of the hydrosol.


The essential oil and hydrosol are then used directly in each batch of product.