6 CARBON BLACK, SOLVENTS, PINE OIL, PINE TAR OIL, PLASTICIZERS, SOFTENER TO FACILITATE THE MIXING, MOLDING OR EXTRUDING OF RUBBER, FOR DIPENTENE, AND LIQUID PETROLEUM GASES INCLUDING ISOBUTANES, BUTANES, AND PROPANES; FROTHING AGENTS, RUBBER SOLVENTS, SOLVENTS DERIVED FROM PINE, ALUMINUM OXIDE