12240-15-2

Basic information

• Product Name: Pigment Blue 27
• Synonyms: CI 75510;CI 77520;BERLIN BLUE;BERLIN BLUE INSOLUBLE;BERLIN BLUE SOLUBLE;PRUSSIAN BLUE SOLUBLE, FOR MICROSCOPY;water-soluble,CI77520;Pigment blue 27 (C.I. 77510)
• CAS NO: 12240-15-2
• Molecular Formula: C₆FeN₆*Fe*K
• Molecular Weight: 306.89
• Product Categories: P;Stains and Dyes;Stains&Dyes, A to
• Mol File: 12240-15-2.mol
• Article Data: 10

Chemical Properties

• Appearance: Blue pwder
• CAS DataBase Reference: Pigment Blue 27(CAS DataBase Reference)
• NIST Chemistry Reference: Pigment Blue 27(12240-15-2)
• EPA Substance Registry System: Pigment Blue 27(12240-15-2)

Safety Data

• Safety Statements: 22-24/25
• WGK Germany: 3
• Hazardous Substances Data: 12240-15-2(Hazardous Substances Data)

Usage

Description

Pigment Blue 27, also known as Acid Blue 29, is a synthetic azo dye that belongs to the class of blue pigments. It is characterized by its intense blue color and is widely used in various industries due to its stability and color properties.

Uses

Used in Histology and Biopsy Applications:
Pigment Blue 27 is used as a staining agent for detecting the presence of iron in histological tissue sections and biopsy specimens. Its ability to bind with iron ions allows for the visualization and identification of iron deposits in tissues, which can be crucial for diagnosing and studying various iron-related diseases and conditions.

InChI:InChI=1/6CN.2Fe.K/c6*1-2;;;/q;;;;;;-3;+2;+1/rC6FeN6.Fe.K/c8-1-7(2-9,3-10,4-11,5-12)6-13;;/q-3;+2;+1

Synthetic route

iron(III) chloride hexahydrate + potassium hexacyanoferrate(III) → potassium iron (II) hexacyanoferrate(III) (12240-15-2)

Conditions	Yield
With water; gold In water deposition in porous alumina on gold surface at pH 2; removal of alumina by etching with 10 % H3PO4;

iron(II) chloride + potassium hexacyanoferrate(III) → potassium iron (II) hexacyanoferrate(III) (12240-15-2)

Conditions	Yield
In water equimolar amt. of educts, stirring;

potassiumhexacyanoferrate(II) trihydrate → potassium iron (II) hexacyanoferrate(III) (12240-15-2)

Conditions	Yield
With hydrogenchloride In water at 80℃; for 24.5h;
With hydrogenchloride In water at 120℃; for 24h; Autoclave;

iron(II) sulfate + potassium hexacyanoferrate(III) → potassium iron (II) hexacyanoferrate(III) (12240-15-2)

Conditions	Yield
With citric acid In water at 20℃; for 1h;

potassium iron (II) hexacyanoferrate(III) (12240-15-2) + tris(2,2’-bipyridyl)ruthenium(III) perchlorate + water (7732-18-5) → oxygen (80937-33-3)

Conditions	Yield
In water Irradiation (UV/VIS); at pH=2; in 1 h;	74%

potassium iron (II) hexacyanoferrate(III) (12240-15-2) + ruthenium(II) tris(2,2’-bipyridyl) (52389-25-0, 24162-12-7, 15158-62-0) + water (7732-18-5) → hydrogen (1333-74-0)

Conditions	Yield
With potassium chloride In water byproducts: O2; Irradiation (UV/VIS); at room temp. under argon; 0.5 M KCl at pH=2 (HCl-KCl buffer); reactiontime 15-70 h;
With ethylenediaminetetraacetic acid In water Irradiation (UV/VIS); at pH=6 (KH2PO4-NaOH buffer) for 1 h;

potassium iron (II) hexacyanoferrate(III) (12240-15-2) + water (7732-18-5) → hydrogen (1333-74-0)

Conditions	Yield
With potassium chloride; ascorbic acid In water in dark;	0%
With potassium chloride; ascorbic acid In water Irradiation (UV/VIS); 0.5 M KCl at pH=2; in 2 h;

potassium iron (II) hexacyanoferrate(III) (12240-15-2) + potassium ion → Everitt's salt (15362-86-4)

Conditions	Yield
In water Electrochem. Process; galvanostatic reduction of Prussian blue on gold and indium-tinoxide electrodes investigated; voltammetry;

potassium iron (II) hexacyanoferrate(III) (12240-15-2) → iron(III) hexacyanoferrate(III) (14433-93-3) + potassium ion

Conditions	Yield
In water Electrochem. Process; galvanostatic oxidn. of Prussian blue on gold and indium-tinoxide electrodes investigated; voltammetry;

Upstream product

• 7705-08-0 iron(III) chloride 
• 121714-78-1 iron(III) chloride hexahydrate 

Relevant articles and documents

Generating New Cross-Relaxation Pathways by Coating Prussian Blue on NaNdF4 To Fabricate Enhanced Photothermal Agents

Cross-relaxation among sensitizers is commonly regarded as deleterious in fluorescent materials, although favorable in photothermal agents. Herein, we coated Prussian blue (PB) on NaNdF4 nanoparticles to fabricate core–shell nanocomplexes with new cross relaxation pathways between the ladder-like energy levels of Nd3+ ions and continuous energy band of PB. The photothermal conversion efficiency was improved exceptionally and the mechanism of the enhanced photothermal effect was investigated. In vivo photoacoustic imaging and photothermal therapy demonstrated the potential of the enhanced photothermal agents. Moreover, the concept of generating new cross-relaxation pathways between different materials is proposed to contribute to the design of all kinds of enhanced photothermal agents.

14. Valence Delocalization in Prussian Blue Fe(III)43*xD2O, by Polarized Neutron Diffraction

Polarized neutron diffraction has been used to investigate the spin delocalization from the high-spin Fe(III) sites to the low-spin Fe(II) in deuteriated Prussian Blue, Fe43*xD2O.Measuremants of the 111, 200, and 400 reflections were made on a powdered sample at 3 K and 4.8 T using a neutron wavelength of 1.074 A.The expectation value of S at the Fe(II) site is -0.008+/-0.028 corresponding to an upper limit of about 5percent of an electron for the spin delocalization.

STUDIES OF DIFFERENT HYDRATED FORMS OF PRUSSIAN BLUE

Results of thermal gravimetric analysis, electrical conductivity and (1)H n.m.r. studies of Prussian Blue, Fe43+2+(CN6>3*nH2O, a classical mixed-valence compound exhibiting semiconducting behaviour in the temperature range 30-150 deg C, are presented.Three different stages of hydration together with the anhydrous form have been identified by thermal gravimetric analysis.The proton magnetic resonance investigation suggested that there are bound water molecules and electrical conductivity studies confirm the existence of these four forms by the four different values of the activation energy.Variations of the activation energy on hydration have been interpreted qualitatively in terms of the energy band and energy levels of Fe2+ and Fe3+.

Eco-friendly porous iron(iii) oxide micromotors for efficient wastewater cleaning

We present catalytic micromotors based on iron(iii) oxides (Fe2O3) obtained by thermal decomposition of octahedral Prussian Blue (PB) microcrystals for efficient adsorption of organic pollutants in water. These porous Fe2O

Metal-organic-frameworks-derived general formation of hollow structures with high complexity

Increasing the complexity of hollow structures, in terms of chemical composition and shell architecture, is highly desirable for both fundamental studies and realization of various functionalities. Starting with metal-organic frameworks (MOFs), we demonstrate a general approach toward the large-scale and facile synthesis of complex hollow microboxes via manipulation of the template-engaged reactions between the Prussian blue (PB) template and different alkaline substances. The reaction between PB microcubes with NaOH solution leads to the formation of Fe(OH)3 microboxes with controllable multishelled structure. In addition, PB microcubes will react with the conjugate bases of metal oxide based weak acids, generating multicompositional microboxes (Fe2O3/SnO2, Fe2O 3/SiO2, Fe2O3/GeO2, Fe2O3/Al2O3, and Fe 2O3/B2O3), which consist of uniformly dispersed oxides/hydroxides of iron and another designed element. Such complex hollow structures and atomically integrated multiple compositions might bring the usual physiochemical properties. As an example, we demonstrate that these complex hollow microboxes, especially the Fe2O 3/SnO2 composite microboxes, exhibit remarkable electrochemical performance as anode materials for lithium ion batteries.