Prussian blue

Also known as Berlin blue, Iron(III) hexacyanoferrate(II), Ferric ferrocyanide, Parisian blue, Ferric hexacyanoferrate, Iron(III) ferrocyanide, Paris blue, Ferrocin

dark blue pigment

OverviewAI-generated

Prussian blue is a chemical compound with the formula C₁₈Fe₇N₁₈. Its IUPAC name is tris(iron(2+));tetrakis(iron(3+));octadecacyanide. The substance has a molecular weight of 859.2 and a mass of 859.5998945000007. It carries a charge of 0 and possesses 36 hydrogen bond acceptors, while having no hydrogen bond donors. The topological polar surface area is 428.

The compound is associated with a Commons category titled "Prussian blue." In scientific literature, it is the subject of 5,559 PubMed entries. Additionally, the topic is referenced by 474 other encyclopedia articles.

Synthesized by Vinony from 14 facts across 4 sources: Wikidata, PubMed, PubChem, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: C18Fe7N18
Molecular weight: 859.2 g/mol
IUPAC name: tris(iron(2+));tetrakis(iron(3+));octadecacyanide
SMILES: [C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3]
InChIKey: DCYOBGZUOMKFPA-UHFFFAOYSA-N
Polar surface area: 428 Å²
H-bond donors: 0
H-bond acceptors: 36
Formal charge: 0

via PubChem

Research

5,559 papers

via PubMed

Wikidata facts

Subclass of: chemical compound
Has part: carbon
Named after: Berlin
Mass: 859.5998945000007
Image: Prussian blue.jpg
Has use: dye

Show 5 more facts

Commons category: Prussian blue
canonical SMILES: [Fe+3].[Fe+3].[Fe+3].[Fe+3].N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N.N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N.N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N
chemical formula: C₁₈Fe₇N₁₈
subject has role: pigment
different from: Persian blue

Sources (3)

via Wikidata · CC0

~22 min read

Encyclopedic overview

Prussian blue (also known as Berlin blue, Brandenburg blue, Parisian and Paris blue) is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the chemical formula Fe4[Fe(CN)6]3. It consists of Fe cations, where iron is in the oxidation state of +3, and [Fe(CN)6] anions, where iron is in the oxidation state of +2, so, the other name of this salt is iron(III) hexacyanoferrate(II). Turnbull's blue is essentially identical chemically, excepting that it has different impurities and particle sizes—because it is made from different reagents—and thus it has a slightly different color.

Prussian blue was created in the early 18th century and is the first modern synthetic pigment. It is prepared as a very fine colloidal dispersion, because the compound is not soluble in water. It contains variable amounts of other ions and its appearance depends sensitively on the size of the colloidal particles. The pigment is used in paints, it became prominent in 19th-century aizuri-e (藍摺り絵) Japanese woodblock prints, and it is the traditional "blue" in technical blueprints.

Excerpted from Wikipedia’s “Prussian blue” article, available under the CC BY-SA 4.0 licence.