Food grade Triiron tetraoxide CAS 1317-61-9

What is Triiron Tetraoxide?

Triiron tetraoxide , also known as iron(II) oxide , has the following chemical formula:

Fe3O4

It is a black inorganic compound composed of iron and oxygen, belonging to the category of iron oxides. Iron(III) oxide can be considered a composite oxide of ferrous oxide and ferric oxide, therefore it is sometimes written as:

Fe₂O₃

From the perspective of valence states, iron(III) oxide contains both divalent and trivalent iron:

· Fe2+Fe 2+

· Fe3+Fe 3+

Therefore, it is also known as a mixed-valence iron oxide.

In nature, iron oxide (Fe3O4) exists in the form of magnetite , and is an important iron ore. Its most typical characteristics are its black appearance and magnetism , which are the main reasons why it is widely used in magnetic materials and industrial functional materials.

Ordinary consumers generally do not come into direct contact with high-purity iron oxide powder, but it may indirectly appear in various aspects of life in the form of pigments, fillers, magnetic materials or food additives.

What are the uses of food-grade Triiron Tetraoxide ?

Food-grade triiron tetraoxide is a product that undergoes strict quality control and meets food safety standards, specifically iron oxide (Fe3O4) or iron oxide black. Its primary function is as a food coloring agent, not as a nutritional fortifier or ordinary food ingredient.

1. Food colorings

The primary use of food-grade triiron tetraoxide is to provide a black or dark visual effect. Because it is color-stable, does not easily fade, and is insoluble in water, it is suitable for food systems requiring a stable black appearance.

Possible applications:

· Candy surface decoration

· Baking decorations

· Food coating

· Specific pastry decorations

· Special food appearance coloring

· Edible inks or food printing materials

Whether it is permitted to use and the maximum amount that can be used depends on the food regulations of different countries or regions.

2. Coloring of capsule and tablet coatings

In some regions, food-grade or pharmaceutical-grade iron oxide black can be used for coloring capsule shells, tablet coatings, or nutritional supplements. Its applications include:

· Differentiate between products of different specifications;

· Improve product appearance;

· To cover the color of the raw material;

· Increase brand recognition.

These types of applications typically require higher levels of impurity control and batch stability.

3. Coloring aids in food contact materials

Certain food contact materials or food packaging materials may use compliant inorganic pigments for coloring. However, such applications must comply with food contact material regulations, and industrial-grade pigments cannot be added arbitrarily.

4. Special food decoration uses

Black is a common visual element in the creative food, holiday food, decorative candy, and baking industries. Food-grade triiron tetraoxide can be used to create black lines, patterns, or decorative effects.

For example:

· Black sugar coating decoration;

· Themed cake decorations;

· Coloring the surface of chocolate or candy;

· Food-grade inkjet or printing pigments.