S 2621 (OTTO) trans-Stilbene, 96% Cas 103-30-0 - used in the manufacturing of dye lasers, optical brighteners, non-steroidal synthetic estrogens such as diethylstilbestrol, fosfestrol and dienestrol. S 2621 (OTTO) trans-Stilbene, 96% Cas 103-30-0 - used as a phosphor and a scintillator. It is also involved in transition metal catalyzed asymmetric epoxidation and dihydroxylation.