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Iron Oxide Yellow CAS 51274-00-1

Molecular Formula: Fe2O3

Formula Weight: 159.69 

ZSpharmac: Iron Oxide Yellow Supplier

Product Name: Iron Oxide Yellow
CAS No: 51274-00-1
Purity: 99%

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Basic Info

Product Name:Iron Oxide Yellow
Other Names:Pigment Yellow 42
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Yellow Powder
EINECS No.:257-098-5
Storage:Room Temperature
Provide:Iron Oxide Yellow MSDS;
Iron Oxide Yellow COA

What is Iron Oxide Yellow?

Iron oxide yellow is also called hydroxyl iron, referred to as iron yellow, and its chemical formula is Fe2O3. H2O or n-FeOOH. Its color varies from lemon to yellow-orange depending on the grain size, and the grain size is between 0.5 and 2 Mm. It has very good light fastness, atmospheric resistance and alkali resistance. The hiding power reaches 10~12 g/m2 οIt is higher than all other yellow pigments, and the coloring power is also very strong. However, the heat resistance is relatively poor. It loses hydration when heated above 177°C, and dehydration is accelerated at 270~300°C and turns into iron oxide red.

Iron Oxide Yellow Property

Melting point 1538 °C
density 5.24
Fp >230 °F
storage temp. Room Temperature
form Powder
color yellow
Water Solubility 1.65μg/L


Iron Oxide Yellow Uses

1. Iron oxide yellow pigment is made use of as a pigment or colorant in premade parts and constructing item materials in different sorts of concrete, as well as is straight mixed into cement for application. Different interior as well as exterior colored concrete surface areas, such as walls, floorings, ceilings, columns, verandas, sidewalks, parking lots, staircases, terminals, and so on; numerous building ceramics and also glazed ceramics, such as encountering blocks, floor tiles, roof ceramic tiles, panels, terrazzo, mosaic tiles, artificial marble, etc

2. Iron oxide yellow pigment appropriates for numerous paint coloring as well as protective compounds, consisting of water-based exterior and interior wall paints, powder coatings, and so on; it can also be put on oil-based paints consisting of numerous guides as well as overcoats such as oxygen-reducing, alkyd, amino, and so on; It can be made use of in toy paint, attractive paint, furnishings paint, electrophoretic paint as well as enamels.

3. Iron oxide yellow pigment is suitable for the coloring of plastic products, such as thermosetting plastics together with thermoplastics, along with the coloring of rubber points, such as vehicle interior tubes, aircraft interior tubes, bike interior tubes, in addition to far more 4. Totally benefited from in the coloring of manufactured marble in addition to terrazzo in the framework along with likewise framework and also building market. It is a pigment for watercolor, oil paint, paint, rubber, and additionally additional. Made use of as an intermediate for iron oxide pigments, such as iron oxide red, iron black, and more.

Along with that, iron oxide yellow pigments can in addition be used in the coloring of various cosmetics, paper, in addition to natural leather.

Preparation of Iron Oxide Yellow

In 1970, Japanese scholars studied the phase diagram of iron oxide microcrystal formation, which laid a theoretical foundation for the preparation method of iron oxide citrine seeds. According to the research results, citrine seeds can be formed under acidic or alkaline conditions. Because iron yellow has a crystal structure, to make it crystallize into pigment particles, it must first form a crystal nucleus, which becomes a crystal seed, and then the crystal nucleus grows up to become iron yellow. Otherwise, only a thin, dull color paste without pigment properties will be obtained. The acid method can be divided into two processes: the iron sheet method and the dropping method.

1. Iron Sheet Method
The raw material used in the method is FeSO4, and in order to maintain the concentration of Fe3+ in the reaction medium within a specific range, a reducing agent iron sheet is added during the reaction. Iron yellow is synthesized under a certain pH condition by adding iron yellow seeds and blowing air. The method mainly has two steps: (1) First, FeSO4·7H2O is used as raw material, NaOH or NH3·H2O is used as precipitant or pH regulator, and air is used as oxidant to oxidize and prepare seed crystals; (2) Seed crystals, FeSO4, iron sheet, The air is subjected to two-step oxidation to produce iron yellow.

Here, NaOH or NH3·H2O is used as a precipitating agent or a pH regulator, and reacts with FeSO4 to generate ferrous hydroxide precipitation; air is used as an oxidant; needed ferrous ions and maintain the pH of the solution. The acid method consumes less alkali and the particles are easier to wash. The relative rates of the two processes, seed preparation and crystal growth, determine the particle size, particle size distribution, and particle morphology of iron yellow particles.

In the test, the growth of iron yellow particles can be inhibited by adding additives, so as to prepare iron oxide yellow crystals with small particle size and narrow distribution. In the crystal growth stage, neutralize the acid generated during the reaction by adding lye dropwise or use iron sheet to react with the acid generated during the reaction. The advantage of the acid method is that it can avoid the precipitation of metal impurities and consume less alkali. The disadvantage is that even after repeated washing, the pigment still contains anions, which will reduce its dispersibility, and a certain degree of transparency must be sacrificed to obtain a higher dispersibility.

2. Dropping Method
In the two-step oxidation, if the ferrous sulfate solution is added dropwise instead of the iron sheet, and ammonia water is added dropwise to neutralize the acid generated during the oxidation process, this method is called the drop method.

The reaction involved is: 4FeSO4+O2 (air)+6H2O=4α-FeOOH↓+4H2SO4

The dropping method needs to drop ferrous sulfate mother liquor and ammonia water into the three-necked bottle at a certain speed, measure the pH value of the reaction system with a pH meter at regular intervals, and analyze the concentration of Fe2+ and Fe3+ with the potassium dichromate method to control the reaction. System pH and Fe2+ concentration. Iron oxide yellow is an important inorganic pigment second only to titanium dioxide. Appropriate raw materials and processes should be used to produce high value-added transparent iron oxide yellow according to local conditions. However, because the reaction involves gas-solid-liquid three-phase, the production process is more complicated, the reaction and crystallization mechanism is not very clear, and the process is difficult to control accurately. Therefore, it is necessary to focus on the reaction and crystallization mechanism of iron oxide yellow in order to produce Iron oxide yellow with high quality and low cost.

Iron Oxide Yellow Physical and Chemical Properties and Structure

1. Iron oxide yellow pigment has acid resistance, alkali resistance, resistance to basic weak acid and thin down acid, as well as is really stable in any type of concentration of alkaline service.

2. Iron oxide yellow pigment has specific light resistance, heat resistance and weather condition resistance, and also its covering film has a sturdy color as well as can keep the layer movie from being harmed in the light. Iron oxide yellow pigment is secure within a specific temperature level variety, but when the temperature exceeds the limit, its shade starts to change, as well as the level of modification ends up being a lot more significant with the rise of temperature. Iron oxide yellow pigments are much less affected by environment problems such as cool and also warm, dry and wet.

3. Iron oxide yellow pigments are extremely secure in any kind of ambient atmosphere (such as gases including H 2 S, CO, SO 2, HCl, NO, and so on). And pollution resistance, water resistance, oil resistance, solvent penetration resistance, insoluble in water, mineral oil or grease.

4. Iron oxide yellow pigment has strong tinting power and high hiding power. As the bit size of the pigment decreases, its tinting power becomes stronger.

About Products:
If you need Iron Oxide Yellow cosmetic raw material, please contact our service personnel directly, we will provide you with high-quality products at the best price.
As an experienced Iron Oxide Yellow manufacturer and supplier, ZSpharmac will provide Iron Oxide Yellow raw materials to customers all over the world for a long time.
Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Cosmetic raw materials
  • Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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