Both skin sensitizing agents. Tests indicate it may be a carcinogen and in Europe it is banned in cosmetics. Treat as cinnamon bark, very powerful skin irritants and sensitizers. A skin sensitizer at all levels of use. Similar photosensitizer to bergamot.
Distilled oil is safe.
Powerful skin sensitizer. The oil is banned in cosmetics in Europe because tests show it may be carcinogenic. Some tansy oils are extremely toxic, even inhalation could cause problems. A fairly powerful skin sensitizer. Extremely powerful skin sensitizer and irritant.