1,4-Dioxane Laboratory Reagent from China
1,4-Dioxane is a six-membered heterocyclic ring with two oxygen hetero-atoms, commonly used as a solvent in labs and extractions. Falls under HTS 2932.99.90 as other heterocyclic compounds with oxygen only. Stabilized grades must meet Chapter 29 note (f) to remain classified here.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include stabilizer declaration if present; must be solely for preservation/transport per note (f) or risks Chapter 38 classification
• Laboratory grade requires COA showing <50 ppm impurities to qualify as chemically defined compound