Registration Dossier
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EC number: 265-086-6 | CAS number: 64741-84-0 A complex combination of hydrocarbons obtained as the raffinate from a solvent extraction process. It consists predominantly of aliphatic hydrocarbons having carbon numbers predominantly in the range of C5 through C11 and boiling in the range of approximately 35°C to 190°C (95°F to 374°F).
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Log Koc have been calculated for various representative components of these streams. The calculated values range from 1.46 — 4.71
Key value for chemical safety assessment
Additional information
A measured Koc is not available for any of the streams in this category. As the log Kow of some streams is >3 the adsorption/desorption endpoint cannot be waived. However, ECHA's Guidance on Information Requirements and Chemical Safety Assessment R7a Endpoint Specific Guidance (2008) indicates that before commissioning a new study alternative sources of data (e. g. QSAR) on the adsorption/desorption potential of a chemical should used. If the calculated Koc proves to be influential in the risk assessment then it may be necessary to conduct a new study.
Soil sorption of non-ionic substances can be estimated from their log Kow. Several QSAR have been developed that calculate the Koc of non-polar hydrocarbons on the basis of their log Kow (e. g. Sablijc and Gusten, 1995). The calculated log Koc are in the range 1.46 -4.71.
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