Ferric Oxide is an inorganic substance, chemical formula Fe2O3, red or dark red amorphous powder. Relative density 5~5.25, melting point 1565ºC (decomposition at the same time). Insoluble in water, slightly soluble. Covering power and coloring power are very strong, no oil permeability and water permeability. Stable in atmosphere and sunlight, resistant to dirty gas, high temperature and alkali.
Stability:
Iron Oxides, which have been approved in Europe for use in food for years, are extremely stable. They have no chemical or physical reaction to acid, heat, light, moisture, oils, oxygen, or pH. This makes them ideal for confection applications because of the differing process variables involved.
Red, Yellow and Black Iron Oxides can be blended with each other and any other natural color to achieve a wide range of color shades. Because they function as pigments, the door is now open to natural colors for direct contact, solvent-based, confectionery inks.