This U.S. industry comprises establishments primarily engaged in (1) distilling coal tars and/or (2) manufacturing cyclic crudes or cyclic intermediates (i.e., hydrocarbons, except aromatic petrochemicals) from refined petroleum or natural gas.

Cross-References. Establishments primarily engaged in--

• Manufacturing cyclic chemicals (except aromatic and intermediates)--are classified in U.S. Industry 325199, All Other Basic Organic Chemical Manufacturing;
• Manufacturing aromatic petrochemicals from refined petroleum or natural gas--are classified in Industry 325110, Petrochemical Manufacturing;
• Manufacturing aromatic petrochemicals by refining crude petroleum--are classified in Industry 324110, Petroleum Refineries;
• Distilling wood products--are classified in U.S. Industry 325191, Gum and Wood Chemical Manufacturing;
• Manufacturing coal tar crudes in steel mills with coke ovens--are classified in U.S. Industry 331111, Iron and Stee l Mills; and
• Manufacturing coal tar crudes in coke oven establishments and fuel briquettes from refined petroleum--are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing.