Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Based on physical-chemical and structural properties of TAME, hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups capable of hydrolysis under environmental conditions (Toxnet, 2014).

 According to existing data, the degradation half-life of TAME in the air is 2.55-3.07 days depending on environmental conditions (predominantly OH-radical concentration). Using a degradation rate constant of 5.22 -12 cm3/molecule/2 and an OH-radical concentration of 5E05 radicals/cm3 a half-life of 3.07 days is calculated. This half-life for degradation in air will be used in further assessment.

Data on experimental determination of photolysis in water is not available. However, because of structural reasons, TAME is not expected to photolyze directly, or photooxidize significantly via reactions with photochemically produced hydroxyl radicals in water.

 

The rate constant used in the assessment are:

Degradation for hydrolysis

0 d-1

Degradation for photolysis

0 d-1

Degradation in air

0.226 d-1