| 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 102 | | .~ Colloid (polyphase discontinuous dispersion) systems (252/304) {2} |
| FOR 103 | DF | .~.~> Smokes, fogs, or gaseous primary dispersants (252/305) |
| FOR 104 | DF | .~.~> Liquid primary dispersants (252/306) {4} |