Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

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.

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

Read across justification:

The registration substance Bis(2-hydroxyethyl) C12-18 alkylamine N-oxide (BANO) is similar to the read across substance BOA as it has the same bis(2-hydroxylethyl) group and has a long chain alkyl amine moiety. BANO has an amine oxide function whereas BOA is an amine. BANO and BAO differ in the chain length as BANO is mostly C12/14 whereas BAO is mostly C18. Both substances are cationic surfactant which means that the sorption properties are mainly determined by ionic interactions and to a lesser extent by unspecific van der Waal forces. Therefore the sorption properties of BANO can be deduced from the Kd values of BAO reasonably. This approach is supported when comparing the sorption properties of other cationic surfactants like N-(2-hydroxyethyl)-N,N-dimethyl alkyl-C12-14-(even numbered)-1-aminium chloride, EC No. 931-275-3, REACH Reg.No. 01-2119484688-17-0000.

Sorption constants from the BOA OECD 106 used for read across to BONA:


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.