Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Summary of degradation

No hydrolysis or other abiotic degradation data are required for this substance, as the substance can be considered to be readily biodegradable based on a read across from a structural similar substance (sodium 5-oxo-DL-prolinate), which showed 74.4% degradation after 28 days (OECD 301, Yoshikawa 1993).

In addition the substance is very soluble in water with a water solubility of 613 g/L (OECD 105, Sárvári 2013b).

Volatilisation

The vapour pressure of the substance was determined to be between 0.54 kPa at 20 °C and 0.68 kPa at 25 °C and therefore can be considered as volatile. However it is unlikely to be persistent in air as AopWin v1.92 gives a Half-Life of 0.757 days.

Distribution modelling

No distribution modelling data exist. However the very low KOC indicates that the substance will remain in the water phase.

Summary of environmental distribution

Adsorption/desorption screening is not required as the substance has a low potential for adsorption (log Kow <1) and is readily biodegradable. For the environmental risk assessment a KOC of 1 l/kg was estimated with Episuite and used for the PNEC calculations.

 

Summary and discussion of bioaccumulation

No experimental data on bioaccumulation exist. The data are not required as the hazard assessment performed concludes that the substance is of no immediate concern to the environment. The available data are adequate for classification and labelling purposes.  In addition the log Kow of <1 shows the bioaccumulation potential is low.

Secondary poisoning

Bioaccumulation of the substance is not expected to occur (log Kow <1). Hence no secondary poisoning risk exists.