… 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. …
Explanatory notes
… 39.13 ‑ 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. 3913.10 ‑ Alginic … alginates are used as thickeners, stabilisers, gelling and film‑forming agents in, for example, the pharmaceutical, …