How to Make Iron Oxide Powder Iron oxide powder, commonly known as rust, is a versatile compound used in pigments, coatings, and DIY projects. Here’s a simple method to create it at home using basic materials. Always wear gloves, a mask, and work in a well-ventilated area to avoid inhaling particles. Materials Needed: Steel wool or pure iron filings, white vinegar, hydrogen peroxide (3%), salt, two plastic containers, a magnet, a coffee filter or sieve, and a mortar and pestle or grinder. Step 1: Prepare the Iron Source. Cut steel wool into small pieces or use iron filings. Ensure the material is clean and free from coatings or oils. Step 2: Accelerate Oxidation. In a plastic container, mix equal parts vinegar and hydrogen peroxide (e.g., 1 cup each). Add a tablespoon of salt to boost the reaction. Submerge the iron completely. Step 3: Let It React. Leave the mixture undisturbed for 1–2 days. Bubbles will form as the solution oxidizes the iron, producing reddish-brown rust. Stir occasionally to expose all surfaces. Step 4: Collect the Rust. Pour the liquid through a coffee filter or sieve to separate the iron oxide residue. Rinse gently with water to remove excess salt, then let it dry completely. Step 5: Grind the Powder. Use a mortar and pestle or grinder to crush dried rust chunks into a fine powder. Pass the powder through a sieve for uniformity. Step 6: Remove Unreacted Iron. Run a magnet through the powder to pull out any leftover metal fragments, ensuring pure iron oxide. Store in an airtight container. Notes: The powder’s color (red, black, or yellow) depends on the iron’s oxidation state. For black iron oxide, heat the red powder in a furnace at high temperatures. Avoid using galvanized or stainless steel, as they resist rusting. This method is cost-effective and ideal for small-scale production. Dispose of chemical waste responsibly.

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