Reaction mass of sodium sulphate and disodium dodecanedioate and Dodecanoic acid, 12-amino-, sodium salt (1:1)

Endpoint summary

Additional information

The adsorption/desorption behaviour of Reaction Mass Of Sodium Sulfate, Sodium Amino-12-Dodecanoate And Sodium Dodecanedioateon soil and sewage sludge was evaluated in a study performed in accordance with OECD testing guideline 121 and GLP requirements.

This test item contains 3 components (from 1 to 3).Quality criteria were fulfilled.

The following table gives the log K_ocvalues obtained for each category.

During the analysis,the temperature was 22°C and the pH values were 3.09 and 6.31, depending on the elution system.

The values of the replicates are reported below.

 

Test	Method	Log Koc
Adsorption Coefficient	OECD121	pH 3.09	pH 6.31
Component 1: AMINO-12		3.75	3.31
Component 2: LACTAM		2.21	2.28
Component 3: OTHERS		< 1.25	< 1.25

These results indicate a moderate potential of the concerned substance to adsorb on soil and sediments.

However, environmntal exposure is not significant. The reaction mass is produced at one manufacturing site and is then used by the paper industry for the production of paper by the Kraft process.

At the manufacturing site, exposure to the substance via releases to the aquatic compartment is very limited. During the concentration step of the reaction mass, water is removed to concentrate the inorganic and organic salts. Release to the aquatic compartment would be possible from this water resulting from this concentration step. Thus based on the process, the wastewater would contain a very limited amount of the reaction mass and is treated by the on-site sewage treatment plant thus resulting in a non significant exposure of the aquatic compartment to the reaction mass.

The use of the reaction mass by the paper industry is done in a closed system where it is entirely consumed during the Kraft process. Thus the use of the substance by the paper industry results in no exposure of the environment to the reaction mass.