Waxes are insoluble in water but soluble in organic, nonpolar solvents. White phosphorus is insoluble in water but soluble in carbon disulfide. Blackberries contain both soluble and insoluble fiber components. Some plants contain significant amounts of soluble and insoluble fiber. These include insoluble as well as soluble fibers. It also contains antioxidants and both soluble and insoluble dietary fiber. Hundreds of soluble and insoluble proteins control shell formation. It is poorly soluble in ethanol and practically insoluble in water. They are available in both water soluble and insoluble forms. Barium sulfate is one of the most insoluble salts of sulfate. Keratin is extremely insoluble in water and organic solvents. The inclusions are small particles of insoluble substances suspended in the cytosol. Radium sulfate is the most insoluble sulfate known. Iron is usually found in a largely insoluble ferric form. CoQ is a crystalline powder insoluble in water.