Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Phototransformation

After evaporation or exposure to air, the substance will be rapidly degraded by photochemical processes (half-life = 4.2 h).

Hydrolysis

According to structural properties, hydrolysis is not expected. A study does not need to be performed since diethanolamine is readily biodegradable.

Biodegradation

The substance is readily biodegradable according to OECD criteria.

Bioaccumulation

Significant accumulation in organisms is not to be expected.

Based on a measured partition coefficient of -2.46 (25 °C, pH 6.8-7.3; see IUCLID Ch. 4.7) DEA has a low potential for bioaccumulation or bioconcentration.

In accordance with column 2 of Annex IX, the study on "bioaccumulation in aquatic species, preferably fish" does not need to be conducted if the substance has a low potential for bioaccumulation (for instance a log Kow <= 3) and/or a low potential to cross biological membranes. DEA has a low potential for bioaccumulation as the measured log Kow values are < 3. Therefore, and for reasons of animal welfare, no bioaccumulation test with fish is conducted.

Adsorption/Desorption

Adsorption to solid soil phase is not expected.

A study is not performed as the substance is readily biodegradable.

Henry's Law Constant

From the water surface, the substance will not evaporate into the atmosphere.

Distribution modelling

Over time, the uncharged substance will preferentially distribute into the compartments water (97%) and air (3%).