Nomenclature
CAS number: 14038-43-8;
12240-15-2
(unspecified formula)
(
OC-6-11)-Iron(3+) (3:4) hexakis(cyano-κ
C) ferrate(4-); ferric ferrocyanide; ferric hexacyanoferrate(II); iron(III) hexacyanoferrate(4-); C.I. 77510; Berlin blue; Chinese blue; Hamburg blue; insoluble Prussian blue; Iron blue; Milori blue; Paris blue; Radiogardase (Heyl).
C
18Fe
7N
18; mol wt 859.23.
C 25.16%, Fe 45.50%, N 29.34%.
Fe
4[Fe(CN)
6]
3.
Description and references
Discovered by Diesbach in 1704; one of the
first synthetic coordination compounds and modern colors. The structure
consists of alternating ferric and ferrous ions on face centered cubic
lattice sites; the remaining charge is balanced by potassium or ferric
ions. Early characterization: J. Brown, Philos. Trans. 33, 17 (1724). Prepn: Colour Index vol. 4 (3rd ed, 1971)
p 4673. Structural study: J. F. Keggin, F. D. Miles, Nature 137, 577 (1936). Crystal
structure: H. J. Buser et al., Inorg. Chem. 16, 2704 (1977). Physicochemical
properties and efficacy in thallium poisoning: J. Kravzov et
al., J. Appl. Toxicol. 13, 213 (1993). Review of toxicology: J. Pearce, Food Chem. Toxicol. 32, 577-582
(1994); of clinical efficacy in radiocesium poisioning: D. F. Thompson,
C. O. Church, Pharmacotherapy 21, 1364-1367 (2001); of use in chemical and biological sensors:
R. Koncki, Crit. Rev. Anal. Chem. 32, 79-96 (2002).
Properties
Purple powder. d 1.75-1.81. Soly (mg/ml): water 6; ethanol 20. Slightly
sol in most organic solvents. Sol in oxalic acid; precipitates on
exposure to light. Absorption max (water):
694 nm.Derivative
Ammonium Ferric Hexacyanoferrate.
Nomenclature
CAS number: 25869-00-5
Ferric ammonium ferrocyanide.
C
6H
4Fe
2N
7; mol wt 285.83.
C 25.21%, H 1.41%, Fe 39.08%, N 34.30%.
NH
4Fe[Fe(CN)
6].
Properties
LD50 orally in mice: >5 g/kg (Pearce).Derivative
Potassium Ferric Ferrocyanide.
Nomenclature
CAS number: 25869-98-1
C.I. 77520; C.I. Pigment Blue 27; iron(III) potassium hexacyanoferrate(4-); soluble Prussian blue.
C
6Fe
2KN
6; mol wt 306.89.
C 23.48%, Fe 36.39%, K 12.74%, N 27.38%.
KFe[Fe(CN)
6].
Use
As pigment in printing inks, paints, alkyd resin
enamels, linoleum, leathercloth, carbon papers, typewriter ribbons,
plastics, artists' colors; in chemical and biological sensors.
Therapeutic Category
Antidote (radioactive cesium and thallium poisoning).
Keywords
Antidote (Heavy Metal Poisoning)