E 3524 (OTTO) 2-Ethyl-1-hexylamine, 98% Cas 104-75-6 - used to make pharmaceuticals and other chemicals. E 3524 (OTTO) 2-Ethyl-1-hexylamine, 98% Cas 104-75-6 - used as beam material and surface active agent. It also involves in synthesis of aliphatic amines.