Registration Dossier
Registration Dossier
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EC number: 246-644-8 | CAS number: 25134-21-8
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Koc constants:
- 1,2,3,6-tetrahydromethyl-3,6-methanophthalic anhydride (METH): Koc,n=25.52 L/Kg
- methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (METHAc): Koc,i= 0.017 L/Kg
Key value for chemical safety assessment
- Koc at 20 °C:
- 25.5
Additional information
The adsorption coefficients on soil of the registered substance (Koc,n: METH) and the corresponding acid (Koc,i: METHAc) were calculated according to the EPA model KOCWIN (v2.00).
It was verified, using the Log Kow method, that Koc,i < Koc,n.
According to the McCall classification scheme, both the anhydride and acid forms are very highly mobile (0 < Koc < 50) on soil.
The higher value of the anhydride form, Koc= 25.5 L/Kg, was selected with conservative approach for the environmental assessment.
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