Registration Dossier
Registration Dossier
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EC number: 277-242-0 | CAS number: 73037-34-0
Endpoint summary
Administrative data
Description of key information
Additional information
Adsorption / desorption
For ditolylether disulfonic acid disodium salt, isomer mixture no experimental results describing the adsorption properties are available.
Under environmental relevant pHs, ditolylether disulfonic acid disodium salt, isomer mixture exists predominantly in the dissociated form, based upon its pKa values. At pH 5 to 9, ditolylether disulfonic acid disodium salt, isomer mixture will be deprotonated resulting in the corresponding anion. As deprotonated substances in particular generally have a low adsorption potential, adsorption for the dissociated form of ditolylether disulfonic acid disodium salt, isomer mixture is not expected.
Nevertheless, the QSAR determination of the carbon partition coefficient using the model KOCWIN included in the Estimation Program Interface (EPI) Suite v4.1 revealed values of 0.044 to 1.346 L/kg (log Kow method) and 2424 to 82790 L/kg (MCI method) relating to the dissociated and non-dissociated form of representative constituents of ditolylether disulfonic acid disodium salt, isomer mixture, respectively. The estimated pkas are in the range of -1.35 to -0.40, indicating that ditolylether disulfonic acid disodium salt, isomer mixture exists predominately in its dissociated form at environmentally relevant pH. As Koc values estimated based upon the log Kow method considers the anionic character of ditolylether disulfonic acid disodium salt, isomer mixture the lowest value of 0.044 L/kg is taken into account for further assessment, indicating a low potential for adsorption.
Henry's Law Constant
The Henry's Law Constant (HLC) for representative constituents of ditolylether disulfonic acid disodium salt, isomer mixture was predicted using the QSAR calculation of the Estimation Program Interface (EPI) Suite v 4.1. The HLC was estimated to be 3.20E-12 Pa m3/mol. Ditolylether disulfonic acid disodium salt, isomer mixture is considered as essentially non-volatile from water.
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