Ammonium Molybdate Catalyst
Ammonium heptamolybdate ((NH4)6Mo7O24) used as a selective oxidation catalyst in acrylic acid production. Falls under HTS 3815.90.2000 as a wholly inorganic molybdenum-based catalytic preparation.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as bulk molybdate salt
Ammonium molybdates as chemicals classify in 2841, separate from Chapter 38 catalytic uses.
If for agricultural micronutrient use
Molybdenum compounds for fertilizer purposes move to Chapter 31, not catalysts.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Test for ammonia content stability; decomposition could shift classification away from 'wholly inorganic'
• Include end-use statement from buyer confirming catalytic application to support tariff positioning
Related Products under HTS 3815.90.20.00
Molybdic Acid Catalyst
Molybdic acid (H2MoO4) in catalytic grade used for oxidation reactions in chemical manufacturing. This wholly inorganic molybdenum compound qualifies for HTS 3815.90.2000 as a reaction accelerator preparation.
Sodium Molybdate Dihydrate Catalyst
Catalytic-grade Na2MoO4·2H2O used in epoxidation reactions and as a corrosion inhibitor catalyst. This inorganic molybdenum salt falls under HTS 3815.90.2000 for reaction accelerator preparations.
Mercuric Sulfate Catalyst
HgSO4 preparation employed as a catalyst in acetylene hydration to acetone production. Classified in HTS 3815.90.2000 as a wholly inorganic mercury reaction initiator.
Molybdenum Trioxide Catalyst
Pure molybdenum trioxide (MoO3) used as a catalyst in petroleum refining processes like hydrodesulfurization. This inorganic compound falls under HTS 3815.90.2000 because it consists wholly of inorganic substances, specifically molybdenum, and serves as a reaction accelerator not specified elsewhere.
Mercury Chloride Catalyst
Mercuric chloride (HgCl2) preparation used as a catalyst in vinyl chloride production and organic synthesis reactions. Classified under HTS 3815.90.2000 as a wholly inorganic mercury-based reaction initiator not covered elsewhere in the tariff.
Mercury Oxide Reaction Initiator
Red mercuric oxide (HgO) prepared for use as a catalyst in laboratory-scale organic reactions and dehydrogenation processes. This inorganic mercury compound is specifically classified under HTS 3815.90.2000.