Description General description (1R, 2R)-1,2-Bis(2-hydroxyphenyl)ethylenediamine or (R, R)-1,2-bis(2-hydroxyphenyl)-1,2-diaminoethane (HPEN) is commonly used in the stereoselective synthesis of enantiopure compounds. Application (1R, 2R)-1,2-Bis(2-hydroxyphenyl)ethylenediamine can be used as a precursor for the synthesis of: • Enantiomerically pure trans-3-arylpiperazine-2-carboxylic acid derivatives via diaza-Cope rearrangement (DCR). • 4,4′-(1,2-Diazaniumylethane-1,2-diyl)dibenzoate trihydrate by treating with terephthalaldehydic acid. Packaging 1, 10 g in poly bottle 100 mg in glass insert