| 507 / | HD | EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY |
| 100 | DF | EARTH BORING {4} |
| 103 | DF | .~ Contains organic component {14} |
| 138 | ![]() | .~.~ Organic component is a fat, fatty alcohol, fatty oil, ester-type wax, fatty still residue, or higher fatty acid or salt thereof |