This is only an excerpt of the full article that appeared in P&F Magazine. The full content is not currently available online.
In 2005, the International Fragrance Association (IFRA) introduced a new Quantitative Risk Assessment (QRA) approach to restrict fragrance materials that have a potential to induce dermal sensitization. This new approach is a much more refined methodology for evaluating sensitizing fragrance materials, and so provides more precise guidance on use levels of materials depending on the situation and the product in which they are used. Ultimately, it will better protect the consumer from becoming sensitized to a specific fragrance ingredient.