Registration Dossier
Registration Dossier
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EC number: 942-086-0 | CAS number: -
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
water solubility (whole substance): <0.1 m/l at 20±0.5°C (read-across).
water solubility (individual constituents): <1.0E-04 to 4.3E-03 mg/l at 20°C (QSAR)
Key value for chemical safety assessment
Additional information
There are no reliable measured water solubility data for the submission substance. However, reliable data are available for related substances in the relevant carbon number range.
The "whole substance" water solubilities of the related substances, Hydrocarbons, C15-C19, n-alkanes, isoalkanes, <2% aromatics (GS270) and Hydrocarbons, C18-C24, isoalkanes, <2% aromatics (GS310) were evaluated using a slow-stir method. The method was designed to be compatible with EU Method A.6 and OECD 105. Since the test substances are a UVCBs, the effect of initial loading rate was also evaluated during the definitive study using initial nominal loading rates of 100 mg/l and 10 mg/l to assess if the resulting aqueous concentration or composition of the dissolved fraction were affected. The water solubility of GS270 and GS310 was determined to be <0.1 mg/l at 20±0.5°C at both the 100 mg/l and 10 mg/l loading rates. The results are considered to be reliable and are used as weight of evidence.
Since the submission substance is a UVCB substance, the water solubility of the individual constituents are also important for environmental risk assessment. The water solubility of each constituent has been predicted using a separately validated QSAR estimation method. The prediction method uses a fragment method and water solubility decreases with increasing carbon number. The prediction domain covers carbon chain length in the range C2-C15 carbon atom, it is therefore expected that water solubility for longer chain length (i.e. greater than C15) compounds will be lower than the predicted value for C15 atom. Thus, the water solubility of the individual constituents is in the range <1.0E-04 to 4.3E-03 mg/l at 20°C.
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