Inorganic hydrazine (N₂H₄) and its inorganic salts fall under the inorganic chemicals chapter, while compounds where hydrazine is bonded to an organic radical—forming hydrazides, hydrazones, or similar structures—are classified here under heading 2928. The presence of a carbon-containing substituent on the nitrogen is the key classification criterion.

Certain hydroxylamine compounds are subject to Commerce Department Export Administration Regulations (EAR) controls because of their potential use in energetic materials. On the import side, TSCA certification is typically required, and specific compounds may trigger DEA or EPA review. Consulting a licensed customs broker or regulatory counsel is advisable for novel or high-purity grades.