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Environmental fate & pathways

Adsorption / desorption

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Description of key information

In consideration of physicochemical properties, structure and reactivity, adsorption / desorption is assessed as not relevant.

Key value for chemical safety assessment

Additional information

Based on the physicochemical properties substance "reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide" can be expected not to have a relevant potential for adsorption neither to organic nor to inorganic material. Experimental data on partition coefficient n-octanol/water are not available as the substance is inorganic. However, a measurement of solubility in standard fat HB 307 (< 6.8 mg/100 g at 37°C) and the data on water solubility (0.68 g/L) indicate on missing affinity to organic material or the aquatic compartment. Using the measured data on fat solubility (as surrogate for the solubility in n-octanol) and the measured water solubility to estimate the log Pow, result in a log Pow of -1. Substance "reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide" is an inorganic, sparingly soluble crystalline solid of lamellar clay mineral (hydrocalumite)-like structure. If released to the environment, the substance most probably will end up in the sediment or soil compartment by sedimentation comparable to natural clay minerals. This fate is not expected to result in any negative environmental impact (c.f. G.E. Batley and M.J. McLaughlin CSIRO Niche Manufacturing Flagship Report, Fate of Manufactured Nanomaterials in the Australian Environment, prepared for the Australian Department of the Environment, Water, Heritage and the Arts (March 2010), available via Internet https://www.environment.gov.au/system/files/pages/371475a0-2195-496d-91b2-0a33f9342a6d/files/manufactured-nanomaterials.pdf).

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