RIFM fragrance ingredient safety assessment, hexadeca-1,5-lactone, CAS Registry Number 7370-44-7

A. M. Api, D. Belsito, D. Botelho, M. Bruze, G. A. Burton, J. Buschmann, M. A. Cancellieri, M. L. Dagli, M. Date, W. Dekant, C. Deodhar, A. D. Fryer, L. Jones, K. Joshi, M. Kumar, A. Lapczynski, M. Lavelle, I. Lee, D. C. Liebler, H. MoustakasM. Na, T. M. Penning, G. Ritacco, J. Romine, N. Sadekar, T. W. Schultz, D. Selechnik, F. Siddiqi, I. G. Sipes, G. Sullivan, Y. Thakkar, Y. Tokura

Research output: Contribution to journalShort surveypeer-review


The existing information supports the use of this material as described in this safety assessment. Hexadeca-1,5-lactone was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data from the target material and read-across analog hydroxynonanoic acid, δ-lactone (CAS # 3301-94-8) show that hexadeca-1,5-lactone is not expected to be genotoxic. Data from analog δ-decalactone (CAS # 705-86-2) provide a calculated Margin of Exposure (MOE) > 100 for the repeated dose and reproductive toxicity endpoints. Data from analog δ-octalactone (CAS # 698-76-0) show that there are no safety concerns for skin sensitization under the current declared levels of use. The phototoxicity/photoallergenicity endpoints were evaluated based on ultraviolet (UV) spectra; hexadeca-1,5-lactone is not expected to be phototoxic/photoallergenic. The local respiratory toxicity endpoint was evaluated using the Threshold of Toxicological Concern (TTC) for a Cramer Class I material; exposure is below the TTC (1.4 mg/day). For the hazard assessment based on the screening data, hexadeca-1,5-lactone is not Persistent, Bioaccumulative, and Toxic (PBT) as per the International Fragrance Association (IFRA) Environmental Standards. Hexadeca-1,5-lactone could not be risk screened as there were no reported volumes of use for either North America or Europe in the 2015 IFRA Survey.

Original languageEnglish (US)
Article number112181
JournalFood and Chemical Toxicology
StatePublished - Jul 2021


  • And reproductive toxicity
  • Developmental
  • Environmental safety
  • Genotoxicity
  • Local respiratory toxicity
  • Phototoxicity/photoallergenicity
  • Repeated dose
  • Skin sensitization

ASJC Scopus subject areas

  • Food Science
  • Toxicology


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