Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Hydrolysis

In accordance with column 2 of the REACH Regulation 1907/2006/EC, Annex VIII section 9.2.2.1, a study on hydrolysis does not need to be conducted as 2-Propenoic acid, docosyl ester is readily biodegradable (but failing the 10 - day window). Further the water solubility of test substance is very low (<20 µg/L at 20°C). Hence, this is not a required endpoint.

 

Biodegradation

Biodegradation in water: screening test (Weight of Evidence approach)

2-Propenoic acid, C16-18-alkyl esters (read across)

In the Ready Biodegradability (CO2-Evolution) Test the degree of biodegradation of the test substance at the end of exposure was determined to be 50-60 % CO2/ThCO2.

 

Dodecyl acrylate (C12) (read across)

The degree of biodegradation of the test substance was 80-90 %CO2/ThCO2 after an exposure period of 28 days.The read across substance (mixture of CAS no. 2156-97-0 and 21643-42-5) is readily biodegradable under the conditions of this test.

 

Icosyl acrylate (C20) (read across)

The degree of biodegradation of the test substance was 60-70 %CO2/ThCO2 after an exposure period of 60 days.The test item was biodegradable under the enhanced test conditions of this test.

 

Conclusion

Considering the results of the biodegradation studies with Dodecyl acrylate/ Laurylacrylate (C12), 2-Propenoic acid, C16-18-alkyl esters and Icosyl acrylate/ Behenylacrylate (C20) a Weight of Evidence approach was made.

Taking all data together, 2-Propenoic acid, docosyl ester is considered to be biodegradable under the enhanced test conditions.

 

Biodegradation in water and sediment

In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex IX, section 9.2.1.2 and 9.2.1.4, no study on biodegradation in water and sediment needs to be conducted if the test substance is readily biodegradable (but failing the 10 - day window) under test conditions. 2-Propenoic acid, docosyl ester is biodegradable under the enhanced test conditions. Thus no further biodegradation testing in water and sediment is required.

 

Biodegradation in soil

In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex IX, section 9.2.1.3, no study on biodegradation in soil needs to be conducted if the test substance is readily biodegradable (but failing the 10 - day window) under test conditions. 2-Propenoic acid, docosyl ester is biodegradable under the enhanced test conditions. Thus no further biodegradation testing in soil is required.

 

Bioaccumulation

Bioaccumulation: aquatic/ sediment

According to REACH Regulation 1907/2006/EC, Annex IX section 9.3.2 column 2 a study for bioaccumulation in aquatic species, preferably fish need not be conducted if no direct or indirect exposure to the aquatic environment is expected.

At production sites, the ester is handled in closed systems for polymerisation. Diffuse releases into the environment from residual monomers in the polymeric products are not of concern due to the extremely low vapour pressure of the substances. Direct and indirect exposure of the test item to water is highly unlikely. Thus no test is required.

 

Transport and distribution

Adsorption/Desorption

The calculated supporting study to 2-Propenoic acid, docosyl ester using KOCWIN v2.00 embedded in EPI Suite v4.10 of EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC) revealed a Log Koc value of 6.240.

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