Registration Dossier
Registration Dossier
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EC number: 271-085-1 | CAS number: 68515-43-5
Endpoint summary
Administrative data
Description of key information
Additional information
Adsorption / desorption
The adsorption coefficient (Koc) on soil and on sewage sludge using high performance liquid chromatography (HPLC) has been estimated for a phthalate ester with C-11 chain length. Adsorption coefficients were estimated to be log Koc soil = 21.41 and log Koc sewage sludge = 23.21.
The adsorption coefficient (Koc) on soil and on sewage sludge using high performance liquid chromatography (HPLC) has also been determined for a phthalate ester with C-6 to C-10 chain length. Adsorption coefficients were estimated to be log Koc soil = 5.55-10.37 and log Koc sewage sludge = 6.29-12.09.
In addition the adsorption coefficient (Koc) of the substance, a phthalate ester with chain length of C9 to C-11, has been estimated using calculation methods to yield a log Koc of 6.397. This value is lower than that obtained experimentally on two analogous substances and is likely to be an under-estimate.
In all cases, the McCall classification scheme classifies the substances as immobile in soil (Koc > 5000).
Henry's Law constant
The Henry's Law constant of 4.88 Pa-m3/mole indicates that the substance is moderately volatile from surface water.
Distribution modelling
Distribution in environmental compartments has been calculated using a Fugacity model according to Mackay, Level III. Distribution in various environmental compartments is estimated as: Air - 0.43%; Water - 3.5%; Soil - 27.2% and Sediment - 68.8%.
Sediment and soil were then found to be the major target compartments.
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