3206.49.55.00 - Pigments and preparations based on hexacyanoferrates (ferrocyanides and ferricyanides)

HTS code 3206.49.55.00 specifically classifies pigments and preparations based on hexacyanoferrates, which include ferrocyanides and ferricyanides. These are inorganic chemical compounds that exhibit coloring properties and are used as pigments in various industrial applications. Examples include Prussian blue (ferric ferrocyanide) and other related complex cyanides of iron.

This classification is distinct from its sibling categories. For instance, it does not cover concentrated pigment dispersions in plastics (3206.49.10), nor does it encompass preparations based on iron oxides (3206.49.20), zinc oxides (3206.49.30), or carbon black (3206.49.40). While some siblings also contain iron, the defining characteristic of this category is the presence and use of hexacyanoferrate structures as the primary coloring agent.

As a leaf node, HTS code 3206.49.55.00 has no further subdivisions. Classification within this code is determined by the chemical composition and the use of the material as a pigment. Importers and exporters should ensure that their products are indeed based on hexacyanoferrates to correctly apply this tariff heading, distinguishing them from other inorganic coloring matter or preparations described in the broader heading 3206.