ApplicationsProperties of Reduced Graphene Oxide Powder Flake size: ≈ 4–6 µm Number of layers: 3–5 Reduction process: Chemical method Color: Black Odor: Odorless Electrical conductivity: ≈ 100–1,000 S/m Specific surface area: 500–700 m²/g Purity: > 99% Carbon: 81.9% Oxygen: 18.1%