| 44 / | HD | FUEL AND RELATED COMPOSITIONS |
| 300 | DF | LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31} |
| 375 | DF | .~ Containing compound having phosphorus bonded directly to chalcogen and directly or indirectly to carbon by nonionic bonding (e.g., alkyl acid phosphates, etc.) {5} |
| 380 | ![]() | .~.~ Organic nitrogen compound salt of organic phosphorus acids {1} |
| 381 | DF | .~.~.~> Chalcogen or additional nitrogen in the organic nitrogen compound |