Ammonium Heptamolybdate Tetrahydrate
Ammonium heptamolybdate tetrahydrate is a crystalline inorganic salt that serves as a soluble source of molybdenum, commonly used in fertilizers, catalysts, and laboratory reagents. Although it is a molybdate salt, its classification under this tariff item is based on its molybdenum oxide content and the absence of a more specific heading. The product is presented as a separate chemically defined compound, consistent with Chapter 28's scope.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is classified as a molybdate salt rather than an oxide or hydroxide
Molybdates are salts of molybdic acid and may fall under heading 28.41 (salts of oxometallic or peroxometallic acids) if not considered an oxide.
If the product is mixed with other substances or not chemically defined
Mixtures or preparations containing molybdenum compounds that are not separate chemically defined compounds may be classified under residual chemical products heading.
If the product is put up as a fertilizer in measured doses or retail packs
Fertilizer preparations containing ammonium molybdate may be classified under Chapter 31 if they meet the conditions for fertilizer products.
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The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is clearly labelled as ammonium heptamolybdate tetrahydrate with its chemical formula to support classification under 2825.70.00
• Provide a certificate of analysis to the CBSA if requested, confirming purity and composition
• Verify whether the product qualifies for any free trade agreement preferential duty rates by reviewing the Rules of Origin
Related Products under Tariff item 2825.70.00
Molybdenum Blue Oxide
Molybdenum blue oxide is a reduced molybdenum oxide consisting of a mixture of molybdenum dioxide (MoO2) and molybdenum trioxide (MoO3). It is used primarily in steel alloying and powder metallurgy applications. As a mixed molybdenum oxide, it falls under tariff item 2825.70.00 for molybdenum oxides and hydroxides.
Molybdenum Dioxide Powder (MoO2)
Molybdenum dioxide (MoO2) powder is a chemically defined inorganic oxide used as an intermediate in reduction processes for producing molybdenum metal and in pigment and alloy manufacturing. It is classified under tariff item 2825.70.00 as a molybdenum oxide, consistent with Chapter 28 notes for separate chemically defined compounds.
Molybdenum Pentoxide
Molybdenum pentoxide, also known as molybdenum(VI) oxide (MoO3), is a pure crystalline form used in research and thin-film deposition. It is a chemically defined molybdenum oxide and is classified under tariff item 2825.70.00, consistent with Chapter 28's coverage of separate chemically defined compounds.
Molybdenum Trioxide Powder (MoO3)
Molybdenum trioxide powder (MoO3) is a fine powder used as a precursor in molybdenum metal production and catalyst manufacturing. As a chemically defined molybdenum oxide, it is classified under tariff item 2825.70.00, in accordance with Chapter 28's provisions for separate chemically defined compounds.
Molybdic Acid (Molybdenum Hydroxide)
Molybdic acid, also known as hydrated molybdenum trioxide (H2MoO4), is used in ceramics and as a catalyst precursor. It falls under tariff item 2825.70.00 as a molybdenum hydroxide, and it is a chemically defined compound per Chapter 28 notes.
Technical Grade Molybdenum Trioxide
Technical grade molybdenum trioxide (MoO3) with 99% purity is used in lubricant additives and pigments. It is classified under tariff item 2825.70.00 as a molybdenum oxide, meeting the definition of an inorganic base oxide under Chapter 28.