Cellulose Acetate Butyrate, CAB-551-0.01 is a cellulose ester with high butyryl content and low viscosity, which significantly affects it solubility and compatibility. It is soluble in styrene and methyl methacrylate monomers and will tolerate more aliphatic and aromatic hydrocarbon diluent than higher viscosity materials. The solubility of CAB-551-0.01 in alcohol/aromatic hydrocarbon mixtures offers an economic advantage and permits the choice of a wide range of solvents and solvent combinations. It also offers improved compatibility with various coating resins. CAB-551-0.01 is a dry, white free-flowing powder convenient to handle.