Synthetic Iron Oxide : Colour, Uses and Characteristics

22 Jul.,2024

 

Synthetic Iron Oxide : Colour, Uses and Characteristics

Synthetic Iron Oxide is amongst the most crucial components of the Inorganic Pigments family. In addition to that, they are also the highest-selling pigments across the world after Titanium Dioxide.

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What are Synthetic Iron Oxide pigments?

The iron oxide pigments have been used as colorants for ages with early humans using them to paint on cave walks. While the natural pigments are derived from various iron oxides minerals, the synthetic pigments are produced under controlled conditions get the desired

  • Particle size
  • Distribution and shape
  • Superior uniformity
  • Better colour quality
  • And, chemical purity.

But what is the reason behind their amazing popularity across the world? Synthetic Iron Oxide pigment are highly stable and possess good strength. Moreover, they are resistant to UV rays, salty weather, and other harsh atmospheric conditions. Also, they are non-hazardous and entirely safe for transport and use.

Also, they are comparatively cheaper than the organic iron oxides pigments due to the low cost of raw material as well as synthetic iron.

The red, yellow, and black colours are primarily used to produce single-component forms. Orange and brown, on the other hand, are made as blends.

Let us have a look at the characteristics and synthetic iron oxide uses.

 

1. Synthetic Red Iron Oxide

Synthetic red oxide pigments are the most common ones, and they also contain the highest amount ofiron. Owing to their pure hue, consistent properties, and tinting strength, red oxides are gaining immense popularity in various fields.

Characteristics:

Synthetic red oxide pigments have the following characteristics:

  • Fine particle size with great tinctorial strength
  • Non-toxic
  • Non-inflammable
  • Resistance to alkali
  • Produces very attractive shades of variegated colours

In addition to the characteristics mentioned above, they have got pure hue and consistent properties.

Uses of Red Iron Oxide:

Red Iron Oxide is mainly used in paints and coatings, rubber, paper, cement colours, and construction. The building materials industry consumes the highest amount of iron oxide pigment. It is because these pigments possess good dispersibility and tinting strength. They are used for coloring concrete, mortar, paving blocks, chequered tiles, and much more.

At Bansal Trading Company, you will find the following red iron oxide pigments of ultimate quality:

  • Synthetic Iron Oxide Red 110
  • Synthetic Iron Oxide Red 129
  • Synthetic Iron Oxide Red 130
  • Synthetic Iron Oxide Red 136
  • Synthetic Iron Oxide Red 445
  • Synthetic Iron Oxides Red 446
  • Synthetic Iron Oxides Red 120
  • Synthetic Iron Oxides Red 190

2. Synthetic Iron Oxide Yellow

The synthetic yellow iron oxide has an extremely fine particle size (but not as fine as the black or red oxides). The actual ones have around 85% Fe2O3 and about 12% LOI with some impurities. These oxides are used in situations where raw colour or raw properties are crucial for the manufacturing process.

It is comparatively fluffier than the red one but lesser than black iron oxide pigment.

Characteristics:

  • Yellow oxide pigments have excellent hiding power
  • They can absorb ultraviolet light
  • Compatible with a wide variety of vehicles
  • Dispersible in aqueous and solvent systems
  • Does not have very heavy metals

Uses of Yellow oxides:

Yellow oxides are widely used in paints, enamels, concrete colorants, plastics, rubber, and also paper (where permanent yellow is needed).

3. Synthetic black iron oxide

Synthetic Black iron oxide acts as a source of Fe in ceramic applications, particularly at places where raw black colour is crucial. The key difference between the red and black iron oxide pigments is that the red iron oxide is ferromagnetic, and black iron oxide is ferrimagnetic.

Synthetic Iron Oxide : Colour, Uses and Characteristics

Synthetic Iron Oxide is amongst the most crucial components of the Inorganic Pigments family. In addition to that, they are also the highest-selling pigments across the world after Titanium Dioxide.

What are Synthetic Iron Oxide pigments?

The iron oxide pigments have been used as colorants for ages with early humans using them to paint on cave walks. While the natural pigments are derived from various iron oxides minerals, the synthetic pigments are produced under controlled conditions get the desired

  • Particle size
  • Distribution and shape
  • Superior uniformity
  • Better colour quality
  • And, chemical purity.

But what is the reason behind their amazing popularity across the world? Synthetic Iron Oxide pigment are highly stable and possess good strength. Moreover, they are resistant to UV rays, salty weather, and other harsh atmospheric conditions. Also, they are non-hazardous and entirely safe for transport and use.

Also, they are comparatively cheaper than the organic iron oxides pigments due to the low cost of raw material as well as synthetic iron.

The red, yellow, and black colours are primarily used to produce single-component forms. Orange and brown, on the other hand, are made as blends.

Let us have a look at the characteristics and synthetic iron oxide uses.

 

1. Synthetic Red Iron Oxide

Synthetic red oxide pigments are the most common ones, and they also contain the highest amount ofiron. Owing to their pure hue, consistent properties, and tinting strength, red oxides are gaining immense popularity in various fields.

Characteristics:

Synthetic red oxide pigments have the following characteristics:

  • Fine particle size with great tinctorial strength
  • Non-toxic
  • Non-inflammable
  • Resistance to alkali
  • Produces very attractive shades of variegated colours

In addition to the characteristics mentioned above, they have got pure hue and consistent properties.

Uses of Red Iron Oxide:

Red Iron Oxide is mainly used in paints and coatings, rubber, paper, cement colours, and construction. The building materials industry consumes the highest amount of iron oxide pigment. It is because these pigments possess good dispersibility and tinting strength. They are used for coloring concrete, mortar, paving blocks, chequered tiles, and much more.

At Bansal Trading Company, you will find the following red iron oxide pigments of ultimate quality:

  • Synthetic Iron Oxide Red 110
  • Synthetic Iron Oxide Red 129
  • Synthetic Iron Oxide Red 130
  • Synthetic Iron Oxide Red 136
  • Synthetic Iron Oxide Red 445
  • Synthetic Iron Oxides Red 446
  • Synthetic Iron Oxides Red 120
  • Synthetic Iron Oxides Red 190

2. Synthetic Iron Oxide Yellow

The synthetic yellow iron oxide has an extremely fine particle size (but not as fine as the black or red oxides). The actual ones have around 85% Fe2O3 and about 12% LOI with some impurities. These oxides are used in situations where raw colour or raw properties are crucial for the manufacturing process.

It is comparatively fluffier than the red one but lesser than black iron oxide pigment.

Characteristics:

  • Yellow oxide pigments have excellent hiding power
  • They can absorb ultraviolet light
  • Compatible with a wide variety of vehicles
  • Dispersible in aqueous and solvent systems
  • Does not have very heavy metals

Uses of Yellow oxides:

Yellow oxides are widely used in paints, enamels, concrete colorants, plastics, rubber, and also paper (where permanent yellow is needed).

3. Synthetic black iron oxide

Synthetic Black iron oxide acts as a source of Fe in ceramic applications, particularly at places where raw black colour is crucial. The key difference between the red and black iron oxide pigments is that the red iron oxide is ferromagnetic, and black iron oxide is ferrimagnetic.

Characteristics:

  • Black iron oxide are ferrimagnetic in nature
  • It has a melting point of 1,597 °C (2,907 °F)
  • Its boiling point is 2,623 °C (4,753 °F)
  • It is an electrical conductor with conductivity significantly higher than red iron oxide.

Uses of black oxide:

The black iron oxide pigment is used as a colorant for a wide array of non-ceramic products as well. Moreover, these black oxides are also used for resisting corrosion on various appliances. They are also a component of anti-corrosion paints (used in many bridges).

4. Synthetic Iron Oxides Orange

The synthetic orange iron oxide pigments are extremely concentrated dry powder having a very fine particle size.

Characteristics:

  • The orange iron oxides have great tinctorial strength
  • They are resistant to alkali
  • Along with being non-toxic in nature, they are also non-inflammable

Uses of Orange Oxides:

Orange iron oxide pigments are often used in different kinds of cement mortars, including plasters, tile mud, floorings, stamped concrete, blocks, etc. In addition to that, these pigments are also used in various color plastics, water-based and oil-based paints, soaps, fertilizers, and even feed products.

 5.  Brown iron oxides pigment

The brown iron oxide pigments are dry colored powder used to colour concrete. These oxides are basically a mixture of red, yellow, and black oxides. This blend gives them a fairly medium brown pigment with slight red tones.

Characteristics:

  • The brown iron oxide pigments are UV stable
  • They are also non-hazardous
  • Brown iron oxides are soluble in water

Uses Brown iron oxides pigment:

The synthetic brown iron oxides pigments are used for a variety of purposes, such as in decorative cosmetics, including foundations, lipsticks, nail lacquers, eyeliners, lip liners, etc.

However, their use is not just confined to cosmetics only. These pigments are also used in the construction industry for the coloration of concrete.

Key takeaways

The synthetic iron oxides industry is growing day by day with the growing demand across various industries. Different iron oxide pigments such as red iron oxide, black iron oxide, brown iron oxide, yellow iron oxide, orange iron oxide, and many others are being produced synthetically at a large scale.

These pigments are comparatively cheaper than the organic ones and superior in quality.

All of these pigments have different uses based on the properties they possess. Moreover, the recent developments in the synthetic iron oxides pigment industry, such as granular forms of iron oxides and enhanced versions of nano-sized materials.

If you have a paint, plastics, or rubber making business, or need Synthetic iron oxide pigment for other industrial purposes, you can contact reputed chemical distributor in India for rates, terms of payment, shipping, and more. Bansal Trading Company is one of the leading and renowned dealers of chemical substances in India. You can us at or call us at 011 for Iron oxide manufacturers in India or any premium quality products for various purposes.

Iron Oxide Pigments

Iron Oxide

Iron oxide pigments are the most often used colour pigments in the world. They are available in the primary colours yellow (FeOOH), black (Fe3O4) and red (Fe2O3), but also as a mixture in orange, beige and brown shades.

The History Of Iron Oxide.

Iron Oxides have been used since prehistoric times (mainly the red shades). They were first used by cavemen to leave testimony of their presence in cave dwellings including animal drawings to ensure bountiful hunting. The first cave drawing was found in the Saubia Mountains (Germany), Lascaux (France) and Altamira (Spain). They were painted between 40,000 and 10,000 BC. Iron Oxide rich mineral clays provided the colors used. Iron Oxide was later found in Neolithic ceramic, Renaissance or Impressionist paintings, bricks of early cities, etc. Natural Iron Oxides are still used nowadays. However, synthetic types are much more popular nowadays because of their higher pigment performance. Their widespread use is due to their natural shade and outstanding chemical, physical and technical properties, which make them essential in many applications.

Key Attributes

Range: Iron Oxides Sub-range: Red Iron Oxides ( GO series) Color Index Pigment Red 101/C.I. (Iron Oxide Red) Basic Chemical Composition Fe2O3 Dispersibility (*) Excellent Hiding Power/Opacity (*) Excellent Heat Fastness (*) 800ºC, 5 min Light Fastness (*) Excellent Weather Fastness (*) Excellent Acid Fastness (*) Excellent Alkali Fastness (*) Excellent Cement compatibility (*) Excellent Solvent Fastness (*) Excellent Metamerism (*) No Applications Food Contact Packaging / Toys / General Packaging / Electric and Electronic Equipment / Automotive / Construction / Fertilizers / Plant Protection Products / Industrial uses / Artist Supply and Hobby preparations.

Manufacturing Process

The Laux process

Reaction of black: 9 Fe + 4 C6H5NO2 + 4 H2O    3 Fe3O4 + 4 C6H5NH2 Reaction of yellow: 2 Fe + C6H5NO2 + 2 H2O    2 FeO(OH) + C6H5NH2 Reaction of red: 2 Fe3O4 + ½ O2    3 Fe2O3

Initially, the Laux process was exclusively used to manufacture aniline (C6H5NH2) from nitrobenzene (C6H5NO2). Only when in the chemist, Dr Laux, found out that the iron oxide, being a by-product of this reaction, could be used, subject to certain chemical conditions, as an iron oxide pigment with extremely high colour strength. This process is primarily used for black iron oxide (e.g. Black 330), however, the reaction to get iron oxide yellow (e.g. Yellow 420) is also possible. From black iron oxide, it is also possible to produce red iron oxide pigments (e.g. Red 110) in an additional reaction stage.


The Precipitation process

2 FeSO4 + 4 NaOH + ½ O2    2 FeO(OH) + 2 Na2SO4 + H2O

In the precipitation process, iron sulphate is oxidized to yellow iron oxide pigment (Bayferrox® Yellow 920) in an alkaline environment with atmospheric oxygen. In this case, similar to the Penniman process, a yellow nucleus pigment is necessary in order to obtain yellow pigments of a high quality.

The Penniman process

2 Fe + ½ O2 + 3 H2O    2 FeO(OH) + 2 H2

In the Penniman process, iron scrap is oxidized to yellow iron oxide (Bayferrox® Yellow 920) in a sulphate acid medium in the presence of atmospheric oxygen. In this case, iron sulphate acts as a catalyst. As to obtain yellow pigments of a high quality, yellow nuclei are furthermore necessary.

Eco - Friendly

Synthetic red, yellow, orange, brown and black iron oxides are non-toxic and made from 60% post-industrial recycled content processed .

Application

Iron oxide Pigments are widely used as inexpensive, durable pigments with large number of benefits and application around wide range of industries and products

Characteristics:

  • Black iron oxide are ferrimagnetic in nature
  • It has a melting point of 1,597 °C (2,907 °F)
  • Its boiling point is 2,623 °C (4,753 °F)
  • It is an electrical conductor with conductivity significantly higher than red iron oxide.

Uses of black oxide:

The black iron oxide pigment is used as a colorant for a wide array of non-ceramic products as well. Moreover, these black oxides are also used for resisting corrosion on various appliances. They are also a component of anti-corrosion paints (used in many bridges).

4. Synthetic Iron Oxides Orange

The synthetic orange iron oxide pigments are extremely concentrated dry powder having a very fine particle size.

Characteristics:

  • The orange iron oxides have great tinctorial strength
  • They are resistant to alkali
  • Along with being non-toxic in nature, they are also non-inflammable

Uses of Orange Oxides:

Orange iron oxide pigments are often used in different kinds of cement mortars, including plasters, tile mud, floorings, stamped concrete, blocks, etc. In addition to that, these pigments are also used in various color plastics, water-based and oil-based paints, soaps, fertilizers, and even feed products.

 5.  Brown iron oxides pigment

The brown iron oxide pigments are dry colored powder used to colour concrete. These oxides are basically a mixture of red, yellow, and black oxides. This blend gives them a fairly medium brown pigment with slight red tones.

Characteristics:

  • The brown iron oxide pigments are UV stable
  • They are also non-hazardous
  • Brown iron oxides are soluble in water

Uses Brown iron oxides pigment:

The synthetic brown iron oxides pigments are used for a variety of purposes, such as in decorative cosmetics, including foundations, lipsticks, nail lacquers, eyeliners, lip liners, etc.

However, their use is not just confined to cosmetics only. These pigments are also used in the construction industry for the coloration of concrete.

Key takeaways

The synthetic iron oxides industry is growing day by day with the growing demand across various industries. Different iron oxide pigments such as red iron oxide, black iron oxide, brown iron oxide, yellow iron oxide, orange iron oxide, and many others are being produced synthetically at a large scale.

These pigments are comparatively cheaper than the organic ones and superior in quality.

All of these pigments have different uses based on the properties they possess. Moreover, the recent developments in the synthetic iron oxides pigment industry, such as granular forms of iron oxides and enhanced versions of nano-sized materials.

If you have a paint, plastics, or rubber making business, or need Synthetic iron oxide pigment for other industrial purposes, you can contact reputed chemical distributor in India for rates, terms of payment, shipping, and more. Bansal Trading Company is one of the leading and renowned dealers of chemical substances in India. You can us at or call us at 011 for Iron oxide manufacturers in India or any premium quality products for various purposes.

Iron Oxide Pigments

Iron Oxide

Iron oxide pigments are the most often used colour pigments in the world. They are available in the primary colours yellow (FeOOH), black (Fe3O4) and red (Fe2O3), but also as a mixture in orange, beige and brown shades.

The History Of Iron Oxide.

Iron Oxides have been used since prehistoric times (mainly the red shades). They were first used by cavemen to leave testimony of their presence in cave dwellings including animal drawings to ensure bountiful hunting. The first cave drawing was found in the Saubia Mountains (Germany), Lascaux (France) and Altamira (Spain). They were painted between 40,000 and 10,000 BC. Iron Oxide rich mineral clays provided the colors used. Iron Oxide was later found in Neolithic ceramic, Renaissance or Impressionist paintings, bricks of early cities, etc. Natural Iron Oxides are still used nowadays. However, synthetic types are much more popular nowadays because of their higher pigment performance. Their widespread use is due to their natural shade and outstanding chemical, physical and technical properties, which make them essential in many applications.

Key Attributes

Range: Iron Oxides Sub-range: Red Iron Oxides ( GO series) Color Index Pigment Red 101/C.I. (Iron Oxide Red) Basic Chemical Composition Fe2O3 Dispersibility (*) Excellent Hiding Power/Opacity (*) Excellent Heat Fastness (*) 800ºC, 5 min Light Fastness (*) Excellent Weather Fastness (*) Excellent Acid Fastness (*) Excellent Alkali Fastness (*) Excellent Cement compatibility (*) Excellent Solvent Fastness (*) Excellent Metamerism (*) No Applications Food Contact Packaging / Toys / General Packaging / Electric and Electronic Equipment / Automotive / Construction / Fertilizers / Plant Protection Products / Industrial uses / Artist Supply and Hobby preparations.

Manufacturing Process

The Laux process

Reaction of black: 9 Fe + 4 C6H5NO2 + 4 H2O    3 Fe3O4 + 4 C6H5NH2 Reaction of yellow: 2 Fe + C6H5NO2 + 2 H2O    2 FeO(OH) + C6H5NH2 Reaction of red: 2 Fe3O4 + ½ O2    3 Fe2O3

Initially, the Laux process was exclusively used to manufacture aniline (C6H5NH2) from nitrobenzene (C6H5NO2). Only when in the chemist, Dr Laux, found out that the iron oxide, being a by-product of this reaction, could be used, subject to certain chemical conditions, as an iron oxide pigment with extremely high colour strength. This process is primarily used for black iron oxide (e.g. Black 330), however, the reaction to get iron oxide yellow (e.g. Yellow 420) is also possible. From black iron oxide, it is also possible to produce red iron oxide pigments (e.g. Red 110) in an additional reaction stage.


The Precipitation process

2 FeSO4 + 4 NaOH + ½ O2    2 FeO(OH) + 2 Na2SO4 + H2O

In the precipitation process, iron sulphate is oxidized to yellow iron oxide pigment (Bayferrox® Yellow 920) in an alkaline environment with atmospheric oxygen. In this case, similar to the Penniman process, a yellow nucleus pigment is necessary in order to obtain yellow pigments of a high quality.

The Penniman process

2 Fe + ½ O2 + 3 H2O    2 FeO(OH) + 2 H2

In the Penniman process, iron scrap is oxidized to yellow iron oxide (Bayferrox® Yellow 920) in a sulphate acid medium in the presence of atmospheric oxygen. In this case, iron sulphate acts as a catalyst. As to obtain yellow pigments of a high quality, yellow nuclei are furthermore necessary.

Eco - Friendly

Synthetic red, yellow, orange, brown and black iron oxides are non-toxic and made from 60% post-industrial recycled content processed .

Application

Iron oxide Pigments are widely used as inexpensive, durable pigments with large number of benefits and application around wide range of industries and products

Are you interested in learning more about concrete oxide pigment? Contact us today to secure an expert consultation!

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