Registration Dossier
Registration Dossier
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EC number: 285-597-8 | CAS number: 85117-47-1
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
The registered substance is produced, supplied and marketed in the presence of a liquid
mineral oil solvent. Removal of this solvent is expected to cause a change in the equilibrium of the chemical
structure of the alkyrated benzene sulfonates resulting in a degradation of the chemical structure to a
structure that is not representative of the substance being placed on the market in the EU. Based on QSAR,
the partition coefficient of the substance is considered to be 22.17.
A partition coefficient in excess of 4.5 is considered to be of concern as potential for bioaccumulation,
according to screening criteria for bioaccummulation in ECHA guidance (Chapter R.11 PBT Assessment).
The likely reliability of the log Pow is, however, considered to diminish above a value of 6, as noted in
Appendix R.11-1 Annex 1 of ECHA guidance on PBT Assessment. Substances with log Pow between 4.5
and 6 are considered likely to be highly accumulating; however no substantial bioconcentration is assumed
for compounds having log Pow with values less than 4.5 or greater than 6. For compounds having log Pow
greater than 6, a gradual decrease of the BCF is observed and it has been hypothesised within the published
literature that a high log Pow is more an effect of solubility than a tendency of the substance to be lipophilic.
This is further supported by the estimation based on EPIWIN that the BCF is 70.79, considerably below the
threshold of concern derived by the REACH criteria of 2000 (B) and 5000 (vB).
Furthermore, controls required for the use of the material are designed ensure no exposure of the substance
to the aquatic environment removing any opportunity for bioaccumulation.
It is therefore considered that the substance is considered to not have the potential to bioaccumulate and it is
therefore not scientifically justified to undertake a study in fish.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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