2933.19.15.00 - 1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate)

This HTS category encompasses specific pyrazolium compounds characterized by a positively charged pyrazole ring with two methyl substituents and two phenyl substituents. The defining feature for classification here is the presence of the methyl sulfate anion. Difenzoquat methyl sulfate, a well-known example, falls under this heading due to its molecular structure meeting these criteria.

Distinguishing this category from its siblings is crucial for accurate classification. While other subheadings within 2933.19 address various substituted pyrazoles, this particular node is reserved for those where the pyrazole ring itself carries a positive charge (forming a pyrazolium ion) and is paired with a methyl sulfate counterion. For instance, siblings like 2933.19.04.00 and 2933.19.08.00 focus on neutral pyrazole derivatives with different substituent patterns or functional groups attached to the ring or its nitrogen atoms, not on charged pyrazolium species.

As a leaf node, 2933.19.15.00 does not have further subcategories. Therefore, precise identification relies on matching the chemical name and structure of the imported or exported substance directly to the description provided. This typically involves detailed laboratory analysis or verified manufacturer declarations to confirm the presence of the 1,2-dimethyl-3,5-diphenyl-1H-pyrazolium cation and the methyl sulfate anion.