Chloe Zhang
Prussian blue is a pigment with a deep and inky colour that has been used in diverse applications for centuries. It is produced by the oxidation of ferrous ferrocyanide salts and consists of iron cations, cyanide anions, and water. Prussian blue is perhaps best known for its use in paints and inks, including in the work of Picasso and Japanese woodblock prints. It is also used in medicine as an antidote for certain types of heavy metal poisoning. Due to its sensitivity to alkaline substances, Prussian blue is rarely found in acrylic ranges, although it can be used in sodium-ion batteries.
| Characteristics | Values |
|---|---|
| What is Prussian Blue? | Prussian Blue is a pigment with a deep and inky colour. |
| Uses | Prussian Blue is used in paints, inks, textiles, and other commercial products. It is also used in medicine as an antidote for certain kinds of heavy metal poisoning. |
| History | Prussian Blue was created by accident in 1704 by a pigment maker in Berlin named Diesbach. It was used in the 19th century in Japanese woodblock prints and is the traditional "blue" in technical blueprints. |
| Availability | Prussian Blue is available in oil and watercolour ranges. It is rarely found in acrylic ranges due to its sensitivity to alkaline substances. |
| Health and Safety | Prussian Blue is not toxic to humans despite the presence of cyanide groups. |
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What You'll Learn
Prussian blue is not a plastic but a pigment
Prussian blue is a pigment with a deep, inky colour. It was discovered in the early 18th century and was soon adopted by painters, particularly in Japan, where it became a staple of the aizuri-e style of woodblock printing. It is also the traditional "blue" in technical blueprints.
Prussian blue is produced by the oxidation of ferrous ferrocyanide salts. Its empirical formula is Fe7(CN)18, and it contains iron cations, cyanide anions, and water. It is also known as iron(III) hexacyanoferrate(II). The compound usually contains inorganic impurities, which can affect its colour.
Prussian blue's ability to transfer electrons efficiently also makes it useful for high-tech applications, such as in sodium-ion batteries. However, its sensitivity to alkaline substances means that it is rarely found in acrylic ranges, and it is challenging to find a genuine Prussian blue paint in this medium.
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It is used in paints and inks
Prussian blue is a pigment that is used in paints and inks. It is a deep and inky colour with a distinct blue hue. It was probably first synthesised by the paint maker Johann Jacob Diesbach in Berlin around 1706. The pigment is believed to have been accidentally created when Diesbach used potash tainted with blood to create some red cochineal dye. The original dye required potash, ferric sulfate, and dried cochineal. Instead, the blood, potash, and iron sulfate reacted to create a compound known as iron ferrocyanide.
Prussian blue was enthusiastically adopted by European easel painters. It was used by painters of the Baroque and Rococo periods and is the characteristic pigment of Picasso's Blue Period. It was also a favourite of Japanese artists, who used it in the aizuri-e style of woodblock printing, in which the image is printed predominantly in blue. Aizuri-e had traditionally used indigo ink, but Prussian Blue was found to be more lightfast and rich in colour.
Prussian blue is included in many ranges of relief printmaking inks, as well as most oil and watercolour ranges. However, the genuine pigment is rarely found in acrylic ranges due to its sensitivity to alkaline substances. It needs a binder that reads at pH 7 or less, while the binders for oil and watercolour paints (linseed oil and gum arabic) are slightly acidic. There are ranges that recreate the colour with a mixture of pigments, such as Golden Acrylic Prussian Blue Hue, which combines Phthalo Blue, Ivory Black, and Dioxazine Violet.
Prussian blue is also known as iron blue, Berlin blue, Parisian blue, Turnbull's blue, and Milori blue.
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It is also used in medicine as an antidote for certain kinds of heavy metal poisoning
Prussian blue is a pigment with a deep and inky colour. It is used in paints, inks, textiles, and other commercial products. It is perhaps best known for its use in Japanese woodblock printing during the 19th century.
Despite containing cyanide groups, Prussian blue is not toxic to humans. In fact, it is even used in medicine as an antidote for certain types of heavy metal poisoning. For example, it can be used to treat thallium(I) and radioactive isotopes of caesium poisoning. This medical application exploits Prussian blue's ion-exchange properties and high affinity for certain "soft" metal cations. Notably, it is included on the World Health Organization's List of Essential Medicines, underscoring its importance in healthcare.
The use of Prussian blue as an antidote for heavy metal poisoning is a specific and important application of the pigment. It is a testament to the versatility of Prussian blue and its ability to interact with certain metals in a beneficial way. This medical use has likely saved lives and improved health outcomes for people experiencing heavy metal toxicity.
The discovery of Prussian blue's medicinal properties may have come about through experimentation and observation of its effects on the human body. Over time, researchers may have identified its ability to counteract the harmful impacts of certain heavy metals. This discovery could have been a breakthrough moment, opening up new avenues for medical research and treatment options.
While Prussian blue is not a plastic type, its medical applications are an essential aspect of its history and impact on various fields, including chemistry, toxicology, and medicine. Its inclusion on the World Health Organization's list underscores how this pigment has found a critical role in healthcare, beyond its artistic and industrial uses.
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Prussian blue was discovered in the early 18th century
The pigment was probably first synthesized by the paint maker Johann Jacob Diesbach in Berlin. It is believed that Diesbach accidentally created Prussian blue when trying to produce a red pigment using potash, iron sulfate, and dried cochineal. However, the potash was tainted with blood, leading to the creation of a compound known as iron ferrocyanide, which has a distinct blue hue.
The earliest known use of Prussian blue in a painting is in the "Entombment of Christ," dated 1709 by Pieter van der Werff. By 1710, painters at the Prussian court were using the pigment, and it had also made its way to Paris, where it was used by artists such as Antoine Watteau, Nicolas Lancret, and Jean-Baptiste Pater. Prussian blue quickly gained popularity among artists due to its intense color, permanence, and affordability, offering a deep, rich hue unlike any other available at the time.
In addition to its use in paintings, Prussian blue also found applications in textile dyeing and printing. It was enthusiastically adopted by European easel painters and became especially important in Japanese woodblock printing, where it was used in the aizuri-e style, which involved printing images predominantly in blue. Prussian blue was found to be more lightfast and rich in color than the indigo ink that had been traditionally used in this art form.
From the beginning of the 18th century, Prussian blue was also the predominant uniform coat color worn by the infantry and artillery regiments of the Prussian Army. This shade, known as Dunkelblau (dark blue), achieved symbolic importance and continued to be worn by most German soldiers for ceremonial and off-duty occasions until World War I.
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It is used in sodium-ion batteries
Prussian blue is not a type of plastic. It is a deep blue pigment with the pigment index number PB27. It was accidentally created in the early 18th century by a paint maker named Johann Jacob Diesbach in Berlin. The pigment was likely synthesized for the first time in 1706, although some sources state the year of its discovery as 1704.
Prussian blue is used in sodium-ion batteries, which are considered a potential alternative to lithium-ion batteries for large-scale stationary storage applications. The first commercial Prussian blue-based sodium-ion battery was developed by Natron Energy in collaboration with ABB Power Conversion. Natron's sodium-ion battery cells offer performance characteristics between lithium-ion batteries and supercapacitors in terms of power capability, energy density, and cycle life.
The advantages of Prussian blue analogues (PBAs) in sodium-ion batteries include excellent electrochemical stability, low cost, and high-rate capability. The open-framework lattice structure of PBAs allows for easy accommodation of Na+ ions and enables their fast transportation. Additionally, the high-temperature calcination required for other cathodes is not necessary during the synthesis of PBAs, further lowering manufacturing costs.
The use of Prussian blue in sodium-ion batteries involves its role as a cathode material. The controllable precipitation method can be used to synthesize high-performance Prussian blue for sodium-ion storage. The Prussian blue material exhibits a rhombohedral structure with high initial Coulombic efficiency, excellent rate performance, and cycling properties. The phase transitions in the material can be investigated using synchrotron in situ powder X-ray diffraction, revealing reversible structural transformations between rhombohedral, cubic, and tetragonal structures upon sodium-ion (de)intercalations.
The commercialization of Prussian blue-based sodium-ion batteries is an ongoing process. Natron Energy has collaborated with various companies to scale up production and integrate these batteries into backup power solutions for datacenter applications. The growing demand for energy storage segments and the advantages of Prussian blue in sodium-ion batteries suggest a promising future for the large-scale application of this technology.
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Frequently asked questions
Prussian Blue is a deep and inky blue colour pigment, which was first discovered in the early 18th century. It is produced by the oxidation of ferrous ferrocyanide salts.
No, Prussian Blue is not a type of plastic. It is a pigment used in paints, inks, textiles and other commercial products. It is also known as iron blue and is classified as an iron(III) hexacyanoferrate(II).
Prussian Blue is used as a pigment in paints, inks and textiles. It is also used in medicine as an antidote for certain types of heavy metal poisoning. In recent years, Prussian Blue has been used in sodium-ion batteries due to its ability to transfer electrons efficiently.
Prussian Blue was likely first synthesised by the paint maker Johann Jacob Diesbach in Berlin around 1706. It is believed that Diesbach accidentally created Prussian Blue when attempting to create a red lake pigment from cochineal.
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