Citral: identifying a threshold for induction of dermal sensitization.
Citral [CAS# 5392-40-5; EINECS# 226-394-6; RIFM # 116; cis- and trans-3,7-dimethyl-2,6-Octadienal] is an important fragrance ingredient appreciated for its powerful lemon-aroma. It is widely used in fragrance formulations and incorporated into numerous consumer products. A comprehensive review of the dermal sensitization data available for citral was undertaken with the goal of identifying a threshold for the induction of dermal sensitization. In 2007, a complete literature search was conducted. On-line databases that were surveyed included Chemical Abstract Services and the National Library of Medicine. In addition, the toxicologic database of the Research Institute for Fragrance materials, Inc. (RIFM) was searched, which includes numerous unpublished reports. Based on a weight of evidence approach, the data from this survey demonstrate that the human NOEL (No Observed Effect Level) for induction of dermal sensitization to citral is 1400 microg/cm(2). The identification of this induction threshold will allow for risk assessments to focus on primary prevention of contact allergy to citral based on a new Quantitative Risk Assessment (QRA) paradigm. This subsequent assessment will form the basis of a risk management approach; specifically a new IFRA (International Fragrance Association) standard on the use of citral in consumer products.[1]References
- Citral: identifying a threshold for induction of dermal sensitization. Lalko, J., Api, A.M. Regul. Toxicol. Pharmacol. (2008) [Pubmed]
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