Registration Dossier
Registration Dossier
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EC number: 309-886-6 | CAS number: 101316-84-1 A tar obtained from low temperature carbonization and low temperature gasification of brown coal. Composed primarily of aliphatic, naphthenic and cyclic aromatic hydrocarbons, heteroaromatic hydrocarbons and cyclic phenols.
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Method C.19, Estimation of the adsorption coefficient (Koc) on soil and sewage sludge using high performance liquid chromatography (HPLC), Council Regulation (EC) No 440/2008, Published in O.J.L 142, 2008.
GLP study
Key value for chemical safety assessment
Additional information
Because of complex composition of the test substance containing hundreds of components with no main component, a Lower and Upper limit of both log Koc (soil) and log Koc (sludge) were determined.
It is redommended in Method C.19: “The method can be used for mixtures which give unresolved elution bands. In such a case, upper and lower limits of the Koc values of the compounds of the test mixture should be stated.”
Results:
Lower and Upper limit of adsorption coefficient of the test substance on soil:
log Koc = 0.6 +/- 0.9 (pH = 6.4, 25°C)
log Koc = 5.2 +/- 0.8 (pH = 6.4, 25°C)
Lower and Upper limit of adsorption coefficient of the test substance on sewage sludge:
log Koc = 0.6 +/- 1.5 (pH = 6.4, 25°C)
log Koc = 5.5 +/- 1.7 (pH = 6.4, 25°C)
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