2931.48.00.00 - 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane 3,9-dioxide

This HTS classification, 2931.48.00.00, specifically covers the organic chemical compound 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 3,9-dioxide. This designation applies to a particular type of organo-phosphorous derivative characterized by its spirocyclic structure, containing two phosphorus atoms and four oxygen atoms within the ring system, along with two methyl substituents.

While other non-halogenated organo-phosphorous derivatives are listed at this level, 2931.48.00.00 is distinguished by its unique spiro[5.5]undecane ring system and the specific arrangement of functional groups as indicated in its chemical name. For instance, siblings like dimethyl methylphosphonate (2931.41.00.00) or methylphosphonic acid (2931.44.00.00) represent simpler phosphonates or phosphonic acids and lack the complex bicyclic structure and the dual phosphorus-containing rings characteristic of the compound under 2931.48.00.00.

As this classification represents a leaf node within the HTS, there are no further subdivisions. Therefore, accurate classification hinges on the precise chemical identity and structural confirmation of the imported or exported substance, ensuring it precisely matches the described spirocyclic diphosphorus compound.