Update to RIFM fragrance ingredient safety assessment, propenylguaethol, CAS Registry Number 94-86-0.

The existing information supports the use of this material as described in this safety assessment. Propenylguaethol was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, photoirritation/photoallergenicity, skin sensitization, and environmental safety. Target data and data from read-across analog isoeugenol (CAS # 97-54-1) show that propenylguaethol is not expected to be genotoxic. Data on read-across analog isoeugenol (CAS # 97-54-1) provide a calculated Margin of Exposure (MOE) > 100 for the repeated dose toxicity and reproductive toxicity endpoints. Data provided propenylguaethol a No Expected Sensitization Induction Level (NESIL) of 2300 μg/cm2 for the skin sensitization endpoint. The photoirritation/photoallergenicity endpoints were evaluated based on ultraviolet/visible (UV/Vis) spectra; propenylguaethol is not expected to be photoirritating/photoallergenic. The local respiratory toxicity endpoint was evaluated using the Threshold of Toxicological Concern (TTC) for a Cramer Class III material, and the exposure to propenylguaethol is below the TTC (0.47 mg/day). The environmental endpoints were evaluated; propenylguaethol was found not to be Persistent, Bioaccumulative, and Toxic (PBT) as per the International Fragrance Association (IFRA) Environmental Standards, and its risk quotients (RQs), based on its current volume of use (VoU) in Europe (EU), North America (NA), Asia-Pacific (AP), or South America (SA) (i.e., Predicted Environmental Concentration/Predicted No Effect Concentration [PEC/PNEC]), are <1.