Linalyl acetate reacts with oxygen to form allergies but perfume manufacturers violate EU Directive by not listing it as an ingredient in their products.
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The study included 1,717 participants who were being assessed for eczema related to contact allergy. Approximately two percent of them had allergic reactions to oxidized linalyl acetate.
"That may seem like a small percentage but it is approximately the same result as for the fragrance compounds listed in the Cosmetics Directive," said Lina Hagvall, one of the researchers.
Because the substance is not mentioned on cosmetic products, consumers have trouble avoiding it, which can turn allergic eczema into a more severe long-term condition.
In accordance with the EU Cosmetics Directive, makeup, ointments, shampoo, deodorants, toothpaste and other products must mention the ingredients in order for consumers to avoid the substances which they are allergic to.
The study has been published in the journal Contact Dermatitis.
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