Red oxide is a widely used pigment due to its excellent color properties, stability, and durability. Here are some of its major or common uses:

1. Paints and coatings: Synthetic iron oxide red is widely used in the production of paints and coatings, including architectural coatings, automotive coatings, and industrial coatings. It provides a bright, vibrant red color and good hiding power.
2. Plastics: It is commonly used in the production of plastic products, including toys, packaging, and consumer goods. Synthetic iron oxide red provides a bright, consistent color that resists fading and discoloration.
3. Concrete and building materials: Synthetic iron oxide red is used in the manufacture of concrete products, including pavers, tiles, and bricks. It provides a natural, earthy red color that is resistant to fading, weathering, and chemical attack.
4. Cosmetics: Synthetic iron oxide red is commonly used as a colorant in cosmetics, such as lipsticks, blushes, and eyeshadows.
5. Printing inks: It is used in the production of printing inks for paper, textiles, and other materials. It provides a bright, vibrant red color that is resistant to fading and smudging..