Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

No studies on the EC substance [940-223-9] itself are available. A read-across approach using the very close structural analogue [938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine (Public name: Sodium cocoyl glycinate (SCG), REACH Registration Number 01-2119930682-38-0000) as source substance was chosen. SCG is a homologue mixture C8 to C18 with C12 as the major constituent. Read across justification see Document attached in IUCLID Chapter 13.

Biodegradation in water: Screening tests

The biodegradability of the the registered substance (24,6% a.i. Sodium alkanoyl glycinate) was investigated in an OECD 301B ready test with non-adapted inoculum over a period of 28d. The initial test item concentration was 108 mg/L. 83 -86% Biodegradation was achieved after 28d. The 10% level of degradation was reached after 1.5d and the 60% pass level after 8d. In a toxicity test with the reference substance sodium benzoate it was demonstrated that the test item in not inhibitory.

Based on the results given before the the registered substance is readily biodegradable fulfilling the 10d window.

Biodegradation in a Sewage Treatment Plant

Results from a preliminary test are available. The elimination and biodegradation of the the registered substance in an activated sludge unit was determinedover a test period (plateau phase) of 28 days according to OECD guideline 303 A.

Specific analysis of the registered substance was carried out via LC-MS/MS. The concentrations in the influent (organic medium and stock solution), effluent and activated sludge were determined. The LOQ for the organic medium was 30 µg/L. For activated sludge the LOQ was 55.6 µg.

One day after starting the application of the registered substance the elimination was already 99 % Furthermore, primary biodegradation started directly after starting the application of the registered substance. During the plateau phase, a primary biodegradation of 94.9 % was reached (median of all samples). The elimination was 99 % for the test item the registered substance. The maximum primary biodegradation was 94.9 % (sewage and sewage sludge).The elimination was 99 % for the test item the registered substance. The maximum primary biodegradation was 94.9 % (sewage and sewage sludge). Sorption to activated sludge was 4.1%.

 

Biodegradation in Freshwater

EC substance [940-223-9] is readily biodegradable and according to the REACH Guidance R.16 Environmental Exposure Estimation Table 16-5 an Environmental half-life of 15d for freshwater can be assigned. Based on this assignment an OECD 309 Test (Aerobic Mineralisation in Surface Water - Simulation Biodegradation Test) is not warranted.

 

Biodegradation in Aerobic Freshwater Sediment

EC substance [940-223-9] is readily biodegradable and according to the REACH Guidance R.16 Environmental Exposure Estimation Table 16-6 an Environmental half-life of 30d for sediment can be assigned as the estimated Kd sediment is < 100 L/kg (see IUCLID Chapter 5.4.1). Based on this assignment an OECD 308 Test (Aerobic and Anaerobic Transformation in Aquatic Sediment Systems) is not warranted.

 

Biodegradation in Aerobic Soil

EC substance [940-223-9] is readily biodegradable and according to the REACH Guidance R.16 Environmental Exposure Estimation Table 16-6 an Environmental half-life of 30d for soil can be assigned as the estimated Kd soil is < 100 L/kg (see IUCLID Chapter 5.4.1). Based on this assignment an OECD 307 Test (Aerobic and Anaerobic Transformation in Soil) is not warranted.