Harmonized System

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Section VII

PLASTICS AND ARTICLES THEREOF; RUBBER AND ARTICLES THEREOF

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Chapter 39

Plastics and articles thereof

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Heading 3913

Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms.

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3913.10

- Alginic acid, its salts and esters

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