Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Methyl eugenol's production as a flavoring agent and in perfumery, may result in its release to the environment through various waste streams; it's use will result in its direct release to the environment. The biodegradability of Methyl Eugenol was tested using the CO2 Evolution Test. The mean per cent degradation of test item was 92.11% at the end of the test while, the percent degradation of reference item was 93.31% and the toxicity control was 88.16% at the end of the test. It was observed that the mean degradation of test item reached 68.03% on Day 11 after reaching 10.12% on Day 2. Therefore, the degradation of Methyl Eugenol reached more than 60% pass level in 10 -day window period after reaching 10% of ThCO2 production and within the 28 -d period of the test.

Methyleugenol is not expected to volatilize from dry soil surfaces based upon its vapor pressure. If released into water, methyleugenol is expected to adsorb moderately to suspended solids and sediment based upon the estimated Koc. Volatilization from water surfaces is expected to be an important fate process based upon this compound's estimated Henry's Law constant. Estimated volatilization half-lives for a model river and model lake are 9 days and 69 days, respectively. Dissipation half-lives of 6 and 34 hours in water at 32 and 22 deg C, respectively, have been reported. An estimated BCF of 18 suggests the potential for bioconcentration in aquatic organisms is low. Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions (HSDB).

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