E 1476 (OTTO) Ethylenediamine dihydrochloride, 99% Cas 333-18-6 - used in modified ethylenediamine condensation method for fluorimetric determination of catecholamines. E 1476 (OTTO) Ethylenediamine dihydrochloride, 99% Cas 333-18-6 - used to investigate the luminescence properties of complexes of EuIII and TbIII with ethylenediamine.