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Pentaethylenehexamine (abbreviated PEHA) is an organic amine. It is composed of five ethylene groups-CH 2 CH 2 - joined together in a chain by four secondary amine groups (-NH-) and terminated on each end by primary amine groups (-NH 2). Pentaethylenehexamine is a hexadentate ligand, owing to the Lewis basicity of the six amine groups. [3]
Tetraethylenepentamine (TEPA) is an organic compound and is in the class of chemicals known as ethyleneamines. It is a slightly viscous liquid and is not colorless but, like many amines, has a yellow color.
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