| 530 / | HD | CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF |
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| 200 | DF | NATURAL RESINS OR DERIVATIVES (E.G., WOOD OR PINE TAR; CATIVO RESIN DERIVATIVES, ETC.) {6} |
| 210 | DF | .~ Rosin or derivative used as starting material in process, or product thereof (e.g., using gum rosin, wood rosin, solid tall oil rosin, etc.) {10} |
| 226 | DF | .~.~ Heat treatment of rosin or derivative in the absence of nonrosin organic reactants, or product thereof (e.g., forming rosin oil; disproportionated, dehydrogenated, or isomerized rosin; etc.) {1} |
| 227 |  | .~.~.~ Metal, halogen, or silicon containing material used in the process, or product thereof (e.g., using clay, zeolites, etc.) |