2905.41.00.00 - 2-Ethyl-2-(hydroxymethyl)propane-1,3-diol (Trimethylolpropane)

This HTS category, 2905.41.00.00, specifically classifies Trimethylolpropane, chemically known as 2-Ethyl-2-(hydroxymethyl)propane-1,3-diol. Trimethylolpropane is a trihydric alcohol, meaning it possesses three hydroxyl (-OH) groups. This structural characteristic dictates its extensive use as a building block in the synthesis of various polymers, resins, and coatings, particularly in the production of polyurethanes, alkyd resins, and synthetic lubricants due to its excellent thermal stability and resistance properties.

Within the broader group of "Other polyhydric alcohols," Trimethylolpropane is distinguished from its siblings by its specific chemical structure and the number and arrangement of its hydroxyl groups. For instance, pentaerythritol (2905.42.00.00) is a tetrahedric alcohol, while mannitol (2905.43.00.00), D-glucitol (sorbitol) (2905.44.00.00), and glycerol (2905.45.00.00) are other specific polyols with different molecular structures and applications. The classification here hinges on precise chemical nomenclature and structural identification.

As this is a leaf node within the HTS structure, there are no further subcategories under 2905.41.00.00. Therefore, the classification of Trimethylolpropane is final at this level. Importers and exporters should ensure that the goods being declared precisely match the chemical identity and description of Trimethylolpropane to ensure accurate customs declaration and compliance.