RIFM fragrance ingredient safety assessment, hexyl hexanoate, CAS Registry Number 6378-65-0

The existing information supports the use of this material as described in this safety assessment. Hexyl hexanoate was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data from read-across analog hexyl isobutyrate (CAS # 2349-07-7) show that hexyl hexanoate is not expected to be genotoxic. The repeated dose, reproductive, and local respiratory toxicity endpoints were evaluated using the threshold of toxicological concern (TTC) for a Cramer Class I material, and the exposure to hexyl hexanoate is below the TTC (0.03 mg/kg/day, 0.03 mg/kg/day, and 1.4 mg/day, respectively). The skin sensitization endpoint was completed using the dermal sensitization threshold (DST) for non-reactive materials (900 μg/cm²); exposure is below the DST. The phototoxicity/photoallergenicity endpoints were evaluated based on ultraviolet (UV) spectra; hexyl hexanoate is not expected to be phototoxic/photoallergenic. The environmental endpoints were evaluated; hexyl hexanoate was found not to be persistent, bioaccumulative, and toxic (PBT) as per the International Fragrance Association (IFRA) Environmental Standards, and its risk quotients, based on its current volume of use in Europe and North America (i.e., Predicted Environmental Concentration/Predicted No Effect Concentration [PEC/PNEC]), are <1.

RIFM fragrance ingredient safety assessment, tetrahydro-α-pentylfurfuryl acetate, CAS Registry Number 67634-08-6

The existing information supports the use of this material as described in this safety assessment. Tetrahydro-α-pentylfurfuryl acetate was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data show that tetrahydro-α-pentylfurfuryl acetate is not genotoxic. The repeated dose, 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 tetrahydro-α-pentylfurfuryl acetate is below the TTC (0.0015 mg/kg/day, 0.0015 mg/kg/day, and 0.47 mg/day, respectively). The skin sensitization endpoint was completed using the dermal sensitization threshold (DST) for non-reactive materials (900 μg/cm²); exposure is below the DST. The phototoxicity/photoallergenicity endpoints were evaluated based on ultraviolet (UV) spectra; tetrahydro-α-pentylfurfuryl acetate is not expected to be phototoxic/photoallergenic. The environmental endpoints were evaluated; tetrahydro-α-pentylfurfuryl acetate was found not to be persistent, bioaccumulative, and toxic (PBT) as per the International Fragrance Association (IFRA) Environmental Standards, and its risk quotients, based on its current volume of use in Europe and North America (i.e., Predicted Environmental Concentration/Predicted No Effect Concentration [PEC/PNEC]), are <1.

RIFM fragrance ingredient safety assessment, 1-nonanol, 2,4,6,8-tetramethyl-,acetate, CAS Registry Number 68922-14-5

The existing information supports the use of this material as described in this safety assessment. 1-Nonanol, 2,4,6,8-tetramethyl-,acetate was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data from 1-nonanol, 2,4,6,8-tetramethyl-,acetate and read-across analog isotridecyl acetate (CAS # 69103-23-7) show that this material is not expected to be genotoxic. Data on read-across material 3,5,5-trimethylhexyl acetate (CAS # 58430-94-7) provide a calculated MOE >100 for the repeated dose and reproductive toxicity endpoints. Based on the existing data and the additional material acetic acid, C11-14-isoalkyl esters, C13-rich (CAS # 84712-50-5), 1-nonanol, 2,4,6,8-tetramethyl-,acetate does not present a concern for skin sensitization under the current, declared levels of use. The phototoxicity/photoallergenicity endpoints were evaluated based on data and UV spectra; 1-nonanol, 2,4,6,8-tetramethyl-,acetate is not expected to be phototoxic/photoallergenic. The local respiratory toxicity endpoint was evaluated using the TTC for a Cramer Class I material and the exposure to 1-nonanol, 2,4,6,8-tetramethyl-,acetate is below the TTC (1.4 mg/day). The environmental endpoints were evaluated; 1-nonanol, 2,4,6,8-tetramethyl-,acetate was found not to be PBT as per the IFRA Environmental Standards, and its risk quotients, based on its current volume of use in Europe and North America (i.e., PEC/PNEC), are <1.