​Iron Oxide Black color ( 50 g )

Iron Oxide Black

Iron oxide black, also known as Pigment Black 11 or Fe3O4 (magnetite), is a synthetic inorganic pigment made from iron oxide. It is a widely used black pigment due to its stability, opacity, and versatility. It is particularly valued for its environmental safety, non-toxicity, and resistance to UV degradation.

Chemical Composition:

• Chemical Formula: Fe3O4 (magnetite)
• CAS Number: 1317-61-9
• Other Names: Magnetite, Black Iron Oxide, Synthetic Iron Oxide Black.

Physical Properties:

• Color: Deep black to bluish-black (may vary slightly depending on the formulation).
• Form: Fine powder
• Density: 5.2 g/cm³
• Particle Size: Typically ranges from 0.2 to 1 microns.
• Solubility: Insoluble in water, stable in a wide range of pH values.
• Stability: Extremely stable, with high resistance to light, heat, and chemical degradation.

Manufacturing Process:

Iron oxide black is typically produced by one of the following methods:

1. The Precipitation Method: This involves oxidizing ferrous salts (like iron sulfate or iron chloride) under controlled conditions to form iron oxide black. The iron salts are then precipitated and processed through high-temperature calcination to convert them into Fe3O4.
2. The Calcination Method: This process involves heating iron compounds (like iron hydroxide or iron sulfate) in the presence of oxygen to form the black iron oxide pigment.

Uses and Applications:

Iron oxide black is widely used in various industries due to its excellent properties, such as lightfastness, chemical stability, and non-toxicity. Some of the primary applications include

3. Cosmetics:

• Iron oxide black is often used in cosmetics and personal care products such as eyeliner, mascara, and other makeup formulations.
• Usage rate: Generally used at a low concentration, around 1% to 3% for color applications, ensuring safety and effective pigmentation.
• Mix 1/8 to 1/2 tea spoon of the oxide powder with oil for every 500 grams of the soap oils.

4. Ceramics and Glass:

• It is used in ceramics and pottery as a pigment to create a rich black color in glazes and decorative finishes.
• Usage rate: For ceramic glazes, the usage rate typically ranges from 2% to 10%, depending on the intensity of the desired black color.

5. Construction Materials:

• Iron oxide black is used in coloring concrete, mortar, and other building materials.
• Usage rate: In concrete applications, it generally ranges from 0.5% to 3% by weight of the cement for effective coloring

Key Advantages:

• Lightfastness: Excellent resistance to light, which ensures that the color will not fade over time, making it ideal for outdoor applications.
• Chemical Stability: Resistant to acids, alkalis, and other chemicals, allowing it to maintain its color under harsh conditions.
• Non-toxicity: Considered non-toxic and environmentally safe, which makes it a popular choice for consumer products, including cosmetics and toys.
• Durability: Strong resistance to UV degradation, weathering, and heat, ensuring longevity in various products.
• Heat Resistance: Iron oxide black can withstand high temperatures, making it suitable for use in industrial and automotive applications.

Percentage and Usage Rate:

The percentage of iron oxide black used in different applications can vary depending on the desired color intensity and product formulation. Typical usage rates include:

• Cosmetics: 1% to 3% in products like eyeliners, mascaras, and face makeup.
• Ceramics and Glass: 2% to 10% depending on the type of product and desired appearance.
• Concrete and Construction Materials: 0.5% to 3% by weight of the cement.

• Environmental and Safety Considerations:

Iron oxide black is considered safe and non-toxic for use in a wide variety of consumer and industrial products. It does not release harmful fumes or chemicals under typical conditions of use and is regarded as environmentally safe. It is not classified as hazardous according to regulatory standards, and there are no known risks associated with its use in paints, cosmetics, or other applications.

Conclusion:

Iron oxide black (Fe3O4) is a versatile, stable, and environmentally friendly pigment used in various industries, from paints and coatings to plastics, cosmetics, and construction materials. Its excellent properties, such as lightfastness, chemical stability, and heat resistance, make it a popular choice for applications where durability and color integrity are essential. The typical usage rate ranges from 0.5% to 20% depending on the specific application and required color intensity