Ferroin
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| Surname | Ferroin | |||||||||||||||
| Molecular formula | [C 36 H 24 FeN 6 ] 2+ (ferroin) or [C 36 H 24 FeN 6 ] 3+ (ferriin) | |||||||||||||||
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| Molar mass | 596.46 g · mol -1 | |||||||||||||||
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||||||||
Ferroin is a chelate complex of complex- bound iron (II) or, in a broader sense, iron (III) (ferriin) and (1,10) phenanthroline . The counterion is usually sulfate (SO 4 2− ).
Ferroin serves as a redox indicator in redox titrations (e.g. cerimetry ), since the color of the complex changes from red (Fe 2+ , Ferroin) to blue (Fe 3+ , Ferriin) through oxidation . The Standardredoxpotential E 0 at pH = 7 is +1.06 V .
Individual evidence
- ↑ There is not yet a harmonized classification for this substance . A labeling of Tris (1,10-phenanthroline-N1, N10) iron sulphate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on March 12, 2019, is reproduced from a self-classification by the distributor .
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1655.
- ↑ Hans-Dieter Jakubke, Ruth Karcher (Ed.): Lexicon of Chemistry , Spectrum Academic Publishing House, Heidelberg, 2001.