2931.42.00.00 - Dimethyl propylphosphonate

This HTS category, 2931.42.00.00, specifically classifies dimethyl propylphosphonate. This compound belongs to the broader group of organo-phosphorous derivatives that do not contain halogens. It is characterized by the presence of a propyl group directly bonded to a phosphorus atom, which is also bonded to two methyl groups and oxygen atoms. These compounds are typically used in various industrial applications, including as flame retardants, pesticides, or intermediates in the synthesis of other chemicals.

Within the broader classification of non-halogenated organo-phosphorous derivatives, dimethyl propylphosphonate is distinguished from its sibling categories by its specific organic substituent. For example, it differs from dimethyl methylphosphonate (2931.41.00.00) by the presence of a propyl group instead of a methyl group attached to the phosphorus, and from diethyl ethylphosphonate (2931.43.00.00) by the specific alkyl groups and their arrangement. Furthermore, it is distinct from methylphosphonic acid (2931.44.00.00) and its salts (2931.45.00.00), which represent different oxidation states or ionic forms of organo-phosphorous compounds.

As this HTS code represents a leaf node, there are no further subcategories under 2931.42.00.00. Classification at this level is precise, identifying the specific compound based on its chemical structure and nomenclature. Practical classification relies on verifying the chemical identity of the imported or exported substance to ensure it precisely matches the definition of dimethyl propylphosphonate, as opposed to other structurally similar organo-phosphorous compounds.