Section 06 Products of the chemical or allied 29 Organic chemicals 29 21 Amine-function compounds 29 21 51 - - o-, m-, p-Phenylenediamine, diaminotoluenes, and their derivatives; salts thereof Commodity Code Description 29 21 51 00 - - o-, m-, p-Phenylenediamine, diaminotoluenes, and their derivatives; salts thereof