Wood creosote is derived from the destructive distillation of wood and is classified under 3807, while coal-tar creosote originates from coal carbonization and falls under a different heading. The distinction is chemically significant: coal-tar creosote is regulated as a pesticide by the EPA, whereas wood creosote has different regulatory treatment. Importers should have documentation of the feedstock and production process to support the correct classification.

Wood tar and its oils are used in pharmaceutical preparations, veterinary products, and specialty coatings. Vegetable pitch and brewers' pitch serve as sealants and binders in brewing and food-packaging applications. Rosin-based pitches are used in adhesives and surface treatments.