2933.11.00.00 - Phenazone (Antipyrine) and its derivatives

This HTS category, 2933.11.00.00, specifically covers Phenazone, also known as Antipyrine, and its direct derivatives. Phenazone is a synthetic organic compound with analgesic and antipyretic properties, historically used in pharmaceutical preparations. Derivatives under this heading would include chemical compounds that are structurally derived from Phenazone through specific chemical modifications, retaining its core heterocyclic structure and intended use as an active pharmaceutical ingredient or intermediate.

This classification is distinct from its sibling category, 2933.19, which is designated for "Other" compounds containing an unfused pyrazole ring. While both categories fall under pyrazole ring compounds, 2933.11.00.00 is reserved for the specific named compound Phenazone and its direct derivatives. The "Other" category would encompass a broader range of pyrazole-based compounds not specifically identified as Phenazone or its direct chemical relatives.

As this node is a leaf node within the HTS classification, there are no further subcategories. Classification under 2933.11.00.00 is determined by the chemical identity of the substance, specifically its confirmation as Phenazone (Antipyrine) or a directly synthesized derivative thereof. This requires careful chemical analysis and verification to ensure accurate import and export declarations.