will the 4-Methylbenzene-1,3-diamine and 4-(4-Aminophenyl)benzenamine mixture and sulphur in 220 ~ 230 ℃ calcination, then use Sodium hydroxide deal with the molten material, filtering, and hydrochloric acid or to the solution through the air on precipitation. Contains large proportion of mixture of 4-(4-Aminophenyl)benzenamine?in low temperature vulcanizing generates a yellow adjustable dye.
