… Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened …
Explanatory notes
… 39.13 ‑ Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened … specified or included, in primary forms. 3913.10 ‑ Alginic acid, its salts and esters 3913.90 ‑ Other The following are … or modified natural polymers of this heading. (1) Alginic acid, its salts and esters Alginic acid , a …