RIFM fragrance ingredient safety assessment, 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol, CAS Registry Number 526218-21-3

A. M. Api, D. Belsito, S. Biserta, D. Botelho, M. Bruze, G. A. Burton, J. Buschmann, M. A. Cancellieri, M. L. Dagli, M. Date, W. Dekant, C. Deodhar, A. D. Fryer, S. Gadhia, L. Jones, K. Joshi, A. Lapczynski, M. Lavelle, D. C. Liebler, M. NaD. O'Brien, A. Patel, T. M. Penning, G. Ritacco, F. Rodriguez-Ropero, J. Romine, N. Sadekar, D. Salvito, T. W. Schultz, F. Siddiqi, I. G. Sipes, G. Sullivan, Y. Thakkar, Y. Tokura, S. Tsang

Research output: Contribution to journalShort surveypeer-review


The existing information supports the use of this material as described in this safety assessment. 1-(2-Methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data show that 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol is not genotoxic. Data on 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol provide a calculated margin of exposure (MOE) > 100 for the repeated dose toxicity endpoint. The reproductive and local respiratory toxicity endpoints were evaluated using the threshold of toxicological concern (TTC) for a Cramer Class III material, and the exposure to 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol is below the TTC (0.0015 mg/kg/day and 0.47 mg/day, respectively). Data show that there are no safety concerns for 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol for skin sensitization under the current declared levels of use. The phototoxicity/photoallergenicity endpoints were evaluated based on ultraviolet (UV) spectra; 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol is not expected to be phototoxic/photoallergenic. The environmental endpoints were evaluated; for the hazard assessment based on the screening data, 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol is not persistent, bioaccumulative, and toxic (PBT) as per the International Fragrance Association (IFRA) Environmental Standards. For the risk assessment, 1-(2-methylprop-2-enoloxy)-2,2,4-trimethylpentan-3-ol was not able to 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 number111492
JournalFood and Chemical Toxicology
StatePublished - Oct 15 2020

ASJC Scopus subject areas

  • Food Science
  • Toxicology


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