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Water solubility

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Description of key information

The water solubility of zinc ferrite at 20°C was determined to be < 1µg/L concerning Fe.

Key value for chemical safety assessment

Additional information

The Study was performed according to OECD Guideline 105 at pH 8.

For the determination six test mixtures of zinc ferrite with two different loading concentrations (1 g/L and 10 g/L) were agitated with a magnetic stirrer for 24 hours at 20 °C. The received suspensions were filtrated through a

0.1 μm (100 nm) membrane filter. Also three blank solutions (standard water pH 8 to ISO 6341, OECD-Guidance-Document 29) were investigated. After filtration of all mixtures and blank solutions iron- and zinc-determination was performed in each filtrate with Graphite Furnace Atomic Absorption Spectrometry (GFAAS).

With a loading of 10 g zinc ferrite to water at pH 8 the dissolved iron was determined to be < 1 µg/L, and the content of zinc was 4.3 µg/L.

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