C.I. Pigment Black 11

• CAT Number: M066572
• CAS Number: 12227-89-3
• Molecular Formula: Fe3O4
• Molecular Weight: 231.54
• Purity: ≥95%
• Storage: -20°C
• IUPAC Name: oxoiron;oxo(oxoferriooxy)iron
• InChI: InChI=1S/3Fe.4O
• InChIKey: SZVJSHCCFOBDDC-UHFFFAOYSA-N
• SMILES: O=[Fe].O=[Fe]O[Fe]=O

C.I. Pigment Black 11（Cat No.:M066572）, also known as mars black or iron oxide black, is an inorganic pigment composed primarily of ferric ferrous oxide (Fe₃O₄ or magnetite). It appears as a deep black powder with excellent opacity, lightfastness, and weather resistance. Commonly used in coatings, plastics, inks, and construction materials, it provides durable, UV-stable coloration. Pigment Black 11 is non-toxic, chemically stable, and environmentally friendly, making it a preferred alternative to carbon black in applications requiring lower conductivity. It is also used in artists’ paints for its rich, matte black tone and strong tinting strength.