29212 -Acyclic polyamines and their derivatives, as well as their salts: HS code chinese tariffs

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292121 Ethylenediamine and its salts Ethylenediamine and its salts

292122 Hexamethylenediamine and its salts Hexamethylenediamine and its salts

29212900 --Other acyclic polyamines and their derivatives, as well as their salts --Other acyclic polyamines and their derivatives, as well as their salts