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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Experimental data on the toxicity of Boron orthophosphate (CAS 13308-51-5) to sediment organisms are not available.

A batch equilibrium study or leaching study did not conducted for Boron orthophosphate considering a high background values and low water solubility of the substance.
Boron is adsorbed onto soil particles, with the degree of adsorption depending on the type of soil, pH, salinity, organic matter content, iron and aluminium oxide content, iron- and aluminium-hydroxy content, and clay content. Boron adsorption can vary from being fully reversible to irreversible, depending on the soil type and condition. The greatest adsorption is observed between a pH of 7.5 and 9.0 (WHO, 2003).
Reference:
WHO (2003). Background document for development of WHO Guidelines for Drinking-water Quality: Boron in Drinking-water. World Health Organization

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Additional information

Experimental data on the adsorption/desorption of Boron orthophosphate (CAS 13308-51-5) are not available.

Testing the adsorption/desorption behaviour according to OECD Guideline 121 is not feasible as the test method is not validated for inorganic substances. A batch equilibrium study or leaching study did not conducted for Boron orthophosphate considering a high background values and low water solubility of the substance.  Boron is adsorbed onto soil particles, with the degree of adsorption depending on the type of soil, pH, salinity, organic matter content, iron and aluminium oxide content, iron- and aluminium-hydroxy content, and clay content. Boron adsorption can vary from being fully reversible to irreversible, depending on the soil type and condition. The greatest adsorption is observed between a pH of 7.5 and 9.0 (WHO, 2003).

Reference:

WHO (2003). Background document for development of WHO Guidelines for Drinking-water Quality: Boron in Drinking-water. World Health Organization