Registration Dossier
Registration Dossier
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EC number: 931-251-2 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The Koc of 2 closely related phthalates was determined for soil and sludge. The adsorption coefficient (Koc) on soil and on sewage sludge using high performance liquid chromatography (HPLC) was estimated according to OECD 121 and Council Regulation (EC) No. 440/2008, Method C.19 for 2 structurally related substances (1,2 -benzenedicarboxylic acid, Di-C6 -10 alkyl ester and diisoundecyl phthalate).
For both substances the Koc for both soil and sludge were found be very high, although the values differed significantly. LogKoc¿s for the C11 phthalate were found to be in the range of 21 and 23, whereas the logKoc¿s for the various isomers of the C6 to C10 phthalate were found to be in the range of 5.5 ¿ 10.4 (soil) and 6.3 ¿ 12.1 (sludge), respectively.
The McCall classification scheme classifies the substances as immobile in soil (Koc>5000).
Key value for chemical safety assessment
- Koc at 20 °C:
- 258 200 000
Additional information
The adsorption coefficient (Koc) on soil and on sewage sludge using high performance liquid chromatography (HPLC) was estimated according to OECD 121 and Council Regulation (EC) No. 440/2008, Method C.19 for 2 structurally related substances (1,2 -benzenedicarboxylic acid, Di-C6 -10 alkyl ester and diisoundecyl phthalate).
For both substances the Koc for both soil and sludge were found be very high, although the values differed significantly. LogKoc for the C11 phthalate were found to be in the range of 21 and 23, whereas the logKoc for the various isomers of the C6 to C10 phthalate were found to be in the range of 5.5 - 10.4 (soil) and 6.3 - 12.1 (sludge), respectively.
The McCall classification scheme classifies the substances as immobile in soil (Koc>5000).
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