| 516 / | HD | COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF |
| FOR 100 | DF | COLLOIDS AND POTENTIAL COLLOIDS; CHEMICAL PROCESSES OF MAKING AND BREAKING (252/302) {8} |
| FOR 124 | DF | .~ Resolving colloids or inhibiting colloidization (252/319) {1} |
| FOR 125 | DF | .~.~ Liquid primary dispersants (252/320) {5} |
| FOR 131 | DF | .~.~.~ Added nongaseous dissimilar treating substances (252/326) {2} |
| FOR 133 | DF | .~.~.~.~ Resolving aqueous-petroleum or aqueous-hydrocarbon systems (252/328) {3} |
| FOR 136 | | .~.~.~.~.~ Organic agents (252/331) {4} |
| FOR 137 | DF | .~.~.~.~.~.~> Organic sulphoxy compound containing (252/332) {4} |
| FOR 145 | DF | .~.~.~.~.~.~> Protein or carboxylic compound containing (252/340) {3} |
| FOR 149 | DF | .~.~.~.~.~.~> Organic amine, amide, or N-base containing (252/344) |
| FOR 150 | DF | .~.~.~.~.~.~> With elements other than C, H, and O (252/345) |