Registration Dossier
Registration Dossier
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EC number: 217-038-0 | CAS number: 1726-23-4
Endpoint summary
Administrative data
Description of key information
Additional information
Adsorption / desorption
The Soil Adsorption Coefficient (Koc) of DIPLAST TM 4, calculated using the softwareKOCWINv2.00, leads to the following estimated results:
Log Koc= 4.8060 (Koc = 63973 L/kg) (from MCI)
Log Koc= 4.2067 (Koc = 16095 L/kg) (from Log Kow)
Overall, the MCI methodology is somewhat more accurate than the Log Kow methodology, although both methods yield good results, then the Koc estimate value from MCI was selected for the environmental assessment.
According to the McCall classification scheme, this means that the above substance is immobile (Koc > 5000) on soil.
Henry's Law constant
The Henry's Law Constant (HLC) of tributyl benzene-1,2,4-tricarboxylate, calculated using the software HENRYWIN v3.20, leads to the following estimated results:
HLC= 1.87E-03 Pa-m3/mole(bond contribution)
HLC= 4.11E-04 Pa-m3/mole(group contribution)
HLC= 3.84E-02 Pa-m3/mole(VP/WS ratio)
It appears reasonable that the key HLC value, needed for the chemical safety assessment, can be the average of them:
HLC_key=1.36E-02 Pa-m3/mole(1.34E-07 atm-m3/mole)
The above value indicates that the substance isessentially non volatilefrom surface water.
Distribution modelling
Distribution in environmental compartments has been calculated using a Fugacity model according to Mackay, Level III. The soil (69 %) was then found to be the major target compartment.
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