9902.11.44 - Polyethylenimine (CAS No. 9002-98-6), refrigerated, in containers not holding over 1 L (provided for in subheading 3911.90.25)

This HTS classification, 9902.11.44, pertains to specific provisions for Polyethylenimine. The product is identified by its CAS number 9002-98-6 and is characterized by being refrigerated and packaged in containers with a volume not exceeding 1 liter. This specific subdivision is a temporary modification or special classification, as indicated by its placement within Chapter 99.

The primary distinction of this category lies in its specific product and its temporary or special nature, rather than general commodity classifications. Unlike the broad sibling categories that cover live animals across various species, 9902.11.44 focuses on a particular chemical compound with defined physical attributes and packaging. The reference to "provided for in subheading 3911.90.25" indicates that while this is a special classification, the underlying material falls under the broader category of polymers of cyclic ethers and cyclic acetals, in primary forms, or other condensation polymers, in primary forms.

As this is a leaf node, there are no further subcategories within 9902.11.44. The classification is complete at this level, with the specified conditions of refrigeration and container size being the defining criteria for this particular HTS code. Importers and exporters should ensure compliance with all stated conditions when classifying goods under this provision, as it represents a deviation from standard tariff treatment due to its specific nature and the temporary or special legislation it falls under.