in men the order of frequency was : dichromate , phenyl-isopropyl-p-phenylene diamine , n-phenyl-cyclohexyl-p-phenylene diamine ( as concomitant allergy ? ) , cobalt ( as concomitant allergy ? ) , p-phenylene diamine , chloramphenicol , formaldehyde , phenylbutazone , balsam of peru , mercury amidochlorate , mercury bichloride ( as concomitant allergy ? ) .
C0031468
phenylene diamine
C0048678
p-phenylene diamine