What it is
Indole is a heterocyclic organic molecule consisting of a fused benzene and pyrrole ring. In cosmetics and personal care it appears as a minor fragrance ingredient, where at high dilution it lends a floral, jasmine-like character to perfume accords. It is used only at very low concentrations because its odor is intense and turns unpleasant when concentrated.
Safety & warnings
As a fragrance material, indole is a potential source of skin sensitization in susceptible individuals and is used within industry fragrance guidelines at low levels. People with fragrance sensitivities may wish to take note of its presence.
Origin & sourcing
Indole occurs naturally in jasmine, orange blossom, and other floral essential oils, and is also produced from the amino acid tryptophan. The grade used in fragrance is most often manufactured synthetically.
Questions everyone asks
What does indole do in a sunscreen?
It serves as a fragrance component, contributing a floral, jasmine-like note to the product's scent. It is present only in trace amounts.
Is indole natural?
Indole occurs naturally in flowers such as jasmine and orange blossom, but the material used in fragrances is usually produced synthetically for consistency.