Registration Dossier
Registration Dossier
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EC number: 828-479-9 | CAS number: 2088841-41-0
Endpoint summary
Administrative data
Description of key information
Additional information
Based on the structure of HBED-Fe no hydrolysis is expected as no hydrolysable groups are present. The substance can thus be regarded as hydrolytically stable. This was confirmed by an actual study with the structurally related EDDHMA-Fe and further supported by its application and use in aqueous solution and also by the read across substance EDDHA-FeNa which is also stable in water..
Abiotic degradation takes place predominately by photolysis as shown in studies with the structurally related EDDHMA-Fe. The half-life time for phototransformation of EDDHMA-FeNa at 25 +/- 3 degree C is determined to be 40.66 and 35.4 hours for the two major components of this UVCB substance, at a light intensity of 4.86E20 photons/second in the wavelength range of 290 - 500 nm.
Biodegradation of HBED-Fe or the structurally related EDDHMA-Fe and EDDHA-FeNa has not been shown in ready biodegradability tests.
A guideline study with HBED-Fe according to OECD guideline 301D showed less than 10% biodegradation of HBED-Fe after a prolonged incubation time of 60 days (van Ginkel, 2013). The lack of biodegradation does not mean that these substances are recalcitrant in nature because the stringency of the test procedures could account for the recalcitrance in these tests.
HBED-Fe is expected to have a low potential for bioaccumulation (HBED-Fe: logPow = -8.97).
Together with the high water solubility of HBED-Fe (> 10 g/L) the substance is expected to be very mobile in the aqueous phase and will not adsorb to sediment and soil.
The latter is expected based on the physicochemical properties of HBED-Fe, the substance can be expected to have a low potential for adsorption. The estimated log Koc was between -3.32 and -4.63 (estimated with the Kow method, KOCWIN v2.00; EPIWIN4.1, however should be treated with care), and was further confirmed by (non-guideline) experimental studies with structurally related EDDHMA and EDDHA.
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