Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 38 MISCELLANEOUS CHEMICAL PRODUCTS 38 11 MINERAL OILS (INCLUDING GASOLINE) OR FOR OTHER LIQUIDS USED FOR THE SAME 38 11 90 OTHER OXIDATION/GUM INHIBITORS, VISCOSITY IMPROVERS, ANTI-CORROSIVE PREPS. Commodity Code Description 38 11 90 00 OTHER OXIDATION/GUM INHIBITORS, VISCOSITY IMPROVERS, ANTI-CORROSIVE PREPS.