Iron Oxide has various commercial uses such as iron ores, catalysts, pigments in dental composites; pigments in paints, coatings, colored concentrates. The magnetic properties of iron oxides have been exploited in a broad range of applications including magnetic seals and inks, magnetic recording media, catalysts, and ferrofluids. The steel and iron industries utilize iron oxide as a feedstock to mass produce iron, steel and other alloys. Sales Specification Brown Powder (combination of yellow and red) Relative Coloring powder (compared with the standard): 98% min Volatile matter @ 105C: 2.5 max Water soluble matter: 0.2% max Residue on 45um mesh: 0.5% max PH of water suspension: 7-9 Oil absorption g/100g: 30-35 Total iron-oxide: 90.0% min Oil resistance: 5 grade Water resistance: 5 grade Alkaline resistance: 5 grade Acid resistance: 5 grade Solvent resistance (alcohol resistance methylbenzene resistance): 5 grade UV absorption: 85% min Quality Standard Meet the standard of USP and European Pharmaceutical standard. Packing 50 LB paper bag.