Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 272-702-7
CAS number: 68909-34-2
acetate lactate oxo ammonium complexes consists of a ammonium [NH4]+ and
a zirconium [Zr]4+ ion as well as an acetic acid [CH3COO]2- and a lactic
acid [CH3CH(OH)COO]2- anion. A complete dissociation of zirconium,
acetate lactate oxo ammonium complexes resulting in ammonium (NH4+),
zirconium oxide (ZrO2), acetic and lactic acid, may be assumed under
environmental conditions. Batch equilibrium experiments with solutions
of water-soluble ZrOCl2 indicated a very fast adsorption of zirconium to
soil (1/k = ~ 3 min) and gave Kd values of 6000 and 30000 L/kg (dw) for
an acidic soil and a calcareous soil, respectively. It was argued that
that the most important process is most likely adsorption to ferric
oxides. However, it should be kept in mind that very low
soil/solution-ratios, favour adsorption, were used because otherwise
concentrations in solution would become unquantifiable. Hence, resulting
Kd values are somewhat overestimated. Desorption experiments indicated
very limited desorption, suggesting that non-reversible adsorption
processes such as inner sphere complexation or surface precipitation are
involved. However, recovery of the added zirconium was not discussed.
According to QSAR, acetate has a low log Kow of -0.17 (experimental data
base match, EpiSuite v.4.11) and QSAR-estimated adsorption coefficients
(KOCWIN v2.00) range from 1 L/kg (MCI method) to 1.153 L/kg (Kow
method), which points to a low potential for adsorption in the
environment. Regarding dissociation product lactate, it has a low log
Kow of -0.72 (experimental data base match, EpiSuite v.4.11) and
estimates of the adsorption coefficients (KOCWIN v2.00) range from
1 L/kg (MCI method) to 0.2218 L/kg (Kow method), pointing towards a low
potential for adsorption in the environment. Available data of
adsorption-desorption batch experiment with lactic acid and silicalite
(i.e. sorbent) gave Kd values from 0.07 to 1.87 L/kg (adsorption) and
0.43 to 2.38 L/kg (desorption), suggesting that lactic acid is highly
mobile in soil. Finally, the experimental log Kow determination is not
possible for ammonium, however, this parameter is expected to be very
low, making an accumulation of ammonium in the environment highly
unlikely. Moreover, ammonium is not expected to be permanently adsorbed
to soils, sediment or suspended matter since it is held by ion exchange
and forms (soluble) inorganic or organic salts with other counter ions
present in soil and water. In sum, all dissociation products except
zirconium are assumed to be mobile in soil, but rapidly biodegraded.
Therefore, Zirconium, acetate lactate oxo ammonium complexes are assumed
to be mobile under environmental conditions, too.
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.
Sellel veebilehel kasutatakse küpsiseid, et tagada lehe parim kasutus.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again