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EC number: 262-309-9
CAS number: 60580-61-2
fate of zinc 5-nitroisophthalate in the environment is most accurately
evaluated by separately assessing the fate of its constituents zinc and
transformation/dissolution tests according to the OECD Series on Testing
and Assessment Number 29 (2001) with a loading of 1 mg/L, a nearly
complete dissolution was already observed after 24 h resulting in
dissolved Zn concentrations of 247 microg Zn/L at pH 6 and 213 a microg
Zn/L at pH 8 (corresponding to 991 and 853 microg/L zinc
5-nitroisophthalate, respectively). Thus, zinc 5-nitroisophthalate is
soluble and expected to dissociate upon contact with water and to
release zinc cations and nitroisophthalate anions. The respective
dissociation is reversible and the ratio of the salt /dissociated ions
is dependent on the metal-ligand dissociation constant of the salt, the
composition of the solution and its pH.
the assessment of enviromental fate of zinc 5-nitroisophthalate,
read-across to the assessment entities soluble zinc substances and
5-nitroisophthalic acid is applied since the ions of zinc
5-nitroisophthalate determine its environmental fate. Since zinc cations
and nitroisophthalate anions behave differently in the environment,
including processes such as stability, degradation, transport and
distribution, a separate assessment of the environmental fate of each
assessment entity is performed. Please refer to the data as submitted
for each individual assessment entity.
Hydrolysis and biodegradation are not relevant for zinc. Zinc is an
essential element that is actively regulated by organisms.
Bioconcentration and bioaccumulation are not considered to be relevant
for inorganic zinc substances. The coefficient for partitioning of zinc
between particulate matter and water (Kpsusp) of 109,648 L/Kg was
derived for EU waters whereas the Kp for the distribution between
sediment and water (Kpsed) was estimated with 73,000 L/kg. For
saltwater, a partition coefficient water/suspended matter of 6010 L/kg
was derived. For soil, a solids-water partitioning coefficient of 158.5
L/kg was determined experimentally.
acid: Regarding abiotic degradation, 5-nitroisophthalic acid does not
contain any components that can hydrolyse in water at an environmentally
relevant pH. Further, according to the QSAR-based predictions,
5-nitroisophthalic acid may not be considered as ready biodegradable and
the logKoc of 5-nitroisophthalic acid is 2.09 (Koc = 123.1 L/kg).
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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