| 516 / | HD | COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF |
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| 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 | DF | .~.~.~.~.~ Organic agents (252/331) {4} |
| FOR 137 |  | .~.~.~.~.~.~ Organic sulphoxy compound containing (252/332) {4} |
| FOR 138 | DF | .~.~.~.~.~.~.~> Petroleum-sulphoxy compound containing (252/333) {1} |
| FOR 140 | DF | .~.~.~.~.~.~.~> Protein or carboxylic compound containing (252/335) {2} |
| FOR 143 | DF | .~.~.~.~.~.~.~> Organic amine, amide, or N-base containing (252/338) |
| FOR 144 | DF | .~.~.~.~.~.~.~> With non-sulphoxy non-carboxylic non-amine compounds (252/339) |