Registration Dossier
Registration Dossier
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EC number: 269-056-3 | CAS number: 68186-94-7 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77494.
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
The water solubility of manganese ferrite at 20 °C was determined to be 1 µg/L concerning Fe.
Key value for chemical safety assessment
Additional information
A very low water solubility of manganese ferrite was determined according to OECD Guideline 105 at pH 8.
For the determination six test mixtures 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 manganese determination was performed in each filtrate with Graphite Furnace Atomic Absorption Spectrometry (GFAAS).
The dissolved iron was determined to be 1 µg/L, and the content of manganese was 26 µg/L at a loading of 10 g manganese ferrite/L. At a loading of 1 g/L manganese ferrite the dissolved iron content was 1 µg/L and manganese 95 µg/L.
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