3913 Natural polymers in primary shapes (such as alginate) and modified natural polymers (such as hardened proteins, chemical derivatives of natural rubber) that are not listed elsewhere: HS code chinese tariffs

3913 Natural polymers in primary shapes (such as alginate) and modified natural polymers (such as hardened proteins, chemical derivatives of natural rubber) that are not listed elsewhere: HS code chinese tariffs

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39131000 -Primary shaped alginate and its salts and esters -Primary shaped alginate and its salts and esters

39139000 -Natural polymers and modified natural polymers of unspecified primary shapes (such as hardened proteins, chemical derivatives of natural rubber) -Natural polymers and modified natural polymers of unspecified primary shapes (such as hardened proteins, chemical derivatives of natural rubber)