Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability

The stability of the representative molecules of sulfated oils in the atmosphere was calculated using the software AOPWIN (v 1.92). The molecules were predicted to be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals. The half-life for this reaction in air ranged from 0.25 to 0.7 hours with an average of approximately 0.5 hours.

The rate of hydrolysis of the representative molecules of sulfated oils in aqueous media has been estimated using QSAR methods. Half-lives of 1 to 1.7 years (average 1.35 years) at pH7 and 36.47 to 62.35 days (average 50 days) at pH 8 are predicted

 

Biodegradation

A number of tests of ready biodegradability have been undertaken either with the substance itself or structural analogues. The results obtained demonstrate ready biodegradability.

 

Bioaccumulation

The potential for bioaccumulation of the substance is low - Estimated BCF equal to 70.8 L/kg whole body w.w.

 

Transport and distribution

Adsorption/desorption- Koc of a number of analogues of the substance wascalculated using the computer program KOCWIN (v2.00), the substance itself not being recognised by the software used. It is predicted that the substance has a (logKoc of approximately 11.5 L/Kg).

Henry's Law Constant-The Henry's Law constant of a number of analogues of the substance was estimated using the software HENRYWIN (v3.20), the substance itself not being recognised by the software used.Predicted values ranged from 2.75E-6 to 4.54E-14 (average 9.2E-7) Pa m³/mol and indicate that the substance is not significantly volatile from surface water.

Distribution modelling-Distribution in environmental compartments of a number of analogues of the substance has been calculated using a Fugacity model according to Mackay, Level III, the substance itself not being recognised by the software used. Soil and water were found to be the major target compartments.