2929.90.50.30 - N-(Dialkyl (≤C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts

This HTS category, 2929.90.50.30, specifically covers N-(Dialkyl (≤C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and their corresponding alkylated or protonated salts. These are organophosphorus compounds characterized by a phosphonamidic fluoride functional group where the nitrogen atom is substituted with a dialkylamino group, and the alkylidene moiety attached to the nitrogen also has specific alkyl or cycloalkyl limitations. The "fluorides" designation is crucial, indicating the presence of a fluorine atom directly bonded to the phosphorus through the P-F linkage.

It is important to differentiate this classification from its siblings. Unlike 2929.90.50.20, which deals with phosphoramidates (esters of phosphoramidic acid, typically involving an O-alkyl group and no P-F bond), or 2929.90.50.40 which covers phosphoramidofluoridates (esters of phosphoramidic acid with a P-F bond), this category is exclusively for phosphonamidic fluorides. The key distinction lies in the parent acid structure (phosphonamidic versus phosphoramidic) and the presence of the P-F bond.

As this is a leaf node, there are no further subdivisions within this specific HTS code. Classification within this code will therefore depend on a precise match to the chemical structure as described. Customs officers will rely on laboratory analysis and detailed product specifications to confirm the presence of the N-(Dialkyl amino))alkylidene phosphonamidic fluoride structure with the specified alkyl chain lengths and the presence of the fluoride on the phosphorus atom.