Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Even hydrolysis as abiotic degradation pathway is in the list of endpoints according to REACH Annex VIII, it is not required if the substance is readily biodegradable. Triethyl citrate was found to be readily biodegradable and the endpoint hydrolysis was waived in accordance with REACH, Annex VIII, Section 9.2.2.1, Column 2.

The phototransformation in air was calculated with the computer program AOPWIN (v1.92a) program made available by the U.S. Environmental Protection Agency. For triethyl citrate an overall OH rate constant (gas-phase reaction constant) of 7.33 E-12 cm3/molecules-sec and a half-life of 1.46 days (17.521 hours) was calculated, assuming a 12- hr day with an OH rate constant of 1.5 E6 OH/cm³. Reaction with N, S and –OH is estimated to be 0.14 E-12 cm3/molecules-sec, no ozone reaction is estimated for the compound. The assumed “Hydrogen Abstraction” gives a value of 7.19 E-12 cm³/molecule-sec, which is almost equal to the overall OH rate constant of the compound. All calculations were performed supposing a surrounding temperature of 25 °C. Thus it can be concluded that the substance will be rapidly degraded in air.