Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

BIODEGRADATION SUMMARY

Biodegradation in water: screening test

The test according OECD 301D (Closed Bottle Test) fulfills the criteria for an Enhanced Biodegradation Screening Test with prolonged duration up to 60d (see REACH Guidance Document Endpoint specific guidance R.7b) . After 35d 69% Degradation was reached and the substance can therefore be classified as readily biodegradable. In addition the test substance is a surfactant (see IUC Chapter 4.10) in detergents and therefore the 10d criteria need not to be fulfilled (see Detergents Regulation 2012/259/EU).

Biodegradation in water and sediment: simulation tests

For the registration substance no Sewage Treatment Simulation Test OECD 303A is available and therefore the result from a similar substance is used instead (details and read across justification see IUCLID Section 5.2.2).

Read across substance:

Bis(2-hydroxyethyl) oleyl amine (BOA), CAS No. 25307 -17 -9, , REACH Reg.No. 01 -2119510876 -0135 -0000

Data used for mass balance in an ACTIVATED SLUDGE PLANT from the OECD 303A Test with BOA:

Mass to effluent: 0.1% (measured), Mass to activated sludge: 0.2% (measured), Mass biodegraded: 99.7% (calc.)

Data used for degradation half-life in aerobic sediment form the OECD 307 data with Hexadecanamine:

Half-life aerobic sediment: 17d at 12 degree Celcius

Biodegradation in soil

For the registration substance no Aerobic transformation test in soil according OECD 307 is available and therefore the result from a similar substance is used instead (details and read across justification see IUCLID Section 5.2.3).

Read across substance:

Hexadecanamine (HDA), CAS No. 143-27-1, is a component of C16-18-(even numbered)-alkylamines with the REACH Reg.No. 01 -2119473799 -015 -0000

Half-life aerobic soil: 17d at 12 degree Celcius

Bioaccumulation: aquatic / sediment and terrestrial

Due to the low log Kow of 1.3 the registration substance has a low potential for bioaccumulation (REACH criteria log Kow <3).

Adsorption / Desorption

For the registration substance no Adsorption / Desorption tests OECD 106 is available and therefore the result from a similar substance is used instead (details and read across justification see IUCLID Section 5.4.1).

Read across substance:

Bis(2-hydroxyethyl) oleyl amine (BOA), CAS No. 25307 -17 -9, EC No. 246 -807 -3, REACH Reg.No. 01 -2119510876 -0135 -0000

Sorption constants from read across substance BOA used for the registration substance:

 

Bis(2-hydroxyethyl) oleyl amine (BOA), CAS No. 25307 -17 -9

Koc (L/kg) 90250
Kd soil (L/kg) 4526
Kd sediment (L/kg) 4526
Kd susp. (L/kg) 9052
Kd act. sludge (L/kg) 2905

Air-water partitioning

Based on the vapor pressure for the registration substance of 8 E-3 Pa, the critical micelle concentration of 11 mg/L and an average mol weight of 296 g/Mol a Henry's Law Constant (HLC) of 0.28 Pa*m3/mol at 25 deg Celcsius can be calculated. This corresponds to an Air-water partitioning coefficient of 5.7 E-5 which means that the registration substance has a low volatility.