Prussian Blue

 

 

 

 

 

                                                                        History Of Blue

 

                                                              18 th Century: Prussian Blue 

                                                            Modern Synthetic Pigment Dye 

 

 

 Around 1706 Diesbach was working in the laboratory of Johann Conrad Dippel in Berlin. Using an extract of crushed cochineal insects, iron sulphate and potash to create cochineal red lake, he used potash that was mixed with Dippel"s animal oil. The result was a very pale red which he concentrated to purple, later a deep blue.

While neither Diesbach nor Dippel knew what exactly happened the formula was the first modern Synthetic pigment, and an important invention, because at that time the alternative blue pigments were either not very successful or affordable for large scale use.

The pigment was first mentioned in a letter, the first of several, from Frisch to the president of the Royal Academy of Sciences, Gottfried Wilhelm Leibniz, dated March 1708. By August 1709, the pigment was being referred to as "Preussisch blau" and by November of that year, as "Berlinisch Blau".

 

 

Prussian Blue 

 

 

 

 

 

 

 

Cyanide was isolated from Cherry Laurel 

 

 

 

 

Cherry Seeds Contain Cyanide 

 

First Isolated In 1782 

 

 

 

Other Cyanogenic Glycosides In Plants 

 

 

 

Prussian Blue To Cyanide 

 

 

 

 

Toxicokinetics Of Cyanide 

 

 

 

 History and Military Use

 

 

 

 

Cyanide off the Battlefield

 

Poison Chemistry: Cyanide

 Prussian Blue: Antidote To Thallium Poisoning 

 

 

 

 

Prussian Blue: Radiation Emergency 

 

 

 

 

 

 Prussian Blue Staining 

 

 

 

Current Events 

 

 

 

 

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