2931.90.70.00 - N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts

This HTS category, 2931.90.70.00, specifically classifies three distinct organo-inorganic compounds: N,N'-Bis(trimethylsilyl) urea, 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester, and 2-Phosphonobutane-1,2,4-tricarboxylic acid along with its salts. These compounds are characterized by the presence of both organic and inorganic elements within their molecular structure, placing them within the broader group of other organo-inorganic compounds. Their specific applications can range across various industrial and chemical processes, depending on their unique chemical properties.

This classification differs from its sibling category, 2931.90.90, which is designated for "Other" organo-inorganic compounds not otherwise specified. While both fall under the "Other organo-inorganic compounds" heading, 2931.90.70.00 is a more specific designation for the named substances. Importers and exporters must accurately identify the presence of these three particular compounds to utilize this more granular classification, rather than defaulting to the general "other" category.

As this node is a leaf node within the HTS, it does not have further subcategories. Therefore, classification at this level requires a precise identification of the merchandise matching the descriptions of N,N'-Bis(trimethylsilyl) urea, 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester, or 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts. This ensures accurate tariff application and compliance with customs regulations.