H 1641 (OTTO) 1-(2-Hydroxyethyl)piperazine, 98% Cas 103-76-4 - used in the preparation of pharmaceutical compounds. H 1641 (OTTO) 1-(2-Hydroxyethyl)piperazine, 98% Cas 103-76-4 - used as an Intermediate in the manufacture of polyurethane catalysts, corrosion inhibitors, surfactants, synthetic fibers, pharmaceuticals. H 1641 (OTTO) 1-(2-Hydroxyethyl)piperazine, 98% Cas 103-76-4 - used to synthesize triethylenediamine.