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Ammonium Tetramolybdate

Ammonium tetramolybdate (NH4)2Mo4O13 is utilized in flame retardants and corrosion inhibitors. It qualifies for HTS 2841.70.10.00 as a peroxometallic/oxometallic salt of ammonium per HTS hierarchy.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China4.3%+12.5%16.8%
🇲🇽Mexico4.3%+10.0%14.3%
🇨🇦Canada4.3%+10.0%14.3%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+12.5%12.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2842.90Lower: 15.8% vs 16.8%

If complex salts with other metals

Double/complex salts including molybdates classified in 2842 per Chapter note.

3206.50.00.00Higher: 44% vs 16.8%

If used as luminophores

Inorganic luminophores excluded from Chapter 28 and go to 3206.

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

• Include molecular formula on labels for customs verification; test for heavy metal impurities

• Avoid pitfall: classifying as organo-inorganic per Chapter 28 exclusion