Registration Dossier
Registration Dossier
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EC number: 415-510-2 | CAS number: 145703-76-0
Endpoint summary
Administrative data
Description of key information
Additional information
The environmental transport and distribution of the substance has been evaluated in terms of its adsorption potential. According to Annex VIII and IX of the REACH Regulation (EC 1907/2006), the study does not need to be conducted if, based on the physicochemical properties, the substance can be expected to have a low potential for adsorption, e.g. the substance has a low octanol water partition coefficient.
However, a measured value is usually needed for ionising substances, since it is important to have information on pH-dependence (cationic substances in particular generally adsorb strongly). Similarly, measured values are normally needed for surface active substances, because Kow values are likely to be poor predictors of adsorption for these types of substance.
In this case, the substance is a salt moderately soluble in water at pH 7, that dissociates in 2Na+and a dianion (two sulfonate groups).
The substance is expected to have a low adsorption potential, since the log Kow is below the cutoff value of 3 (log Kow = -1.6 at pH 7 by the shake flask method or log Kow = -1.9 estimated by the measured solubilities of the substance in octanol and water).
Moreover, the adsorption potential is not expected to significantly vary in the environmental pH range (pH 5 to 9), since the charge of the substance is not expected to change. Note that, except for the two sulfonate groups, no other groups are expected to be significantly protonated/deprotonated in this pH interval.
Finally, the Kow is expected to reliably predict the adsorption potential, since the substance is not surface-active: the surface tension is above the cutoff value of 60 mN/m (surface tension = 61.4 mN/m).
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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