Calcium Hydrogenorthophosphate Fertilizer
Calcium hydrogenorthophosphate (dicalcium phosphate) fertilizer containing at least 0.2% fluorine by weight on a dry anhydrous basis. This product is specifically listed in Chapter 31 Note 3(a)(iv) as a phosphatic fertilizer under heading 31.03.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fluorine content is below 0.2%
Fails the specific note 3(a)(iv) criterion and may be a separate chemically defined compound excluded by Chapter Note 1(b).
Not sure which classification is right?
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
• Confirm the fluorine content meets the 0.2% threshold with lab analysis, as lower-fluorine product may classify elsewhere
• Ensure the product is not put up in retail packages per heading 31.05
• Provide CBSA with the fluorine test certificate to support classification
Related Products under Tariff item 3103.90.00
Calcined Natural Phosphate Fertilizer
Calcined natural phosphate fertilizer, produced by heat-treating natural phosphates of heading 25.10 beyond simple impurity removal. This process enhances reactivity for agricultural use, and the product is explicitly covered by Chapter 31 Note 3(a)(ii) as a phosphatic fertilizer.
Rock Phosphate Heat-Treated Fertilizer
Rock phosphate that has been heat-treated beyond simple impurity removal, such as calcination, to improve its fertilizing properties. This product falls under Chapter 31 Note 3(a)(ii) as a calcined natural phosphate fertilizer.
Single Superphosphate Granules
Single superphosphate (SSP) granules, produced by treating phosphate rock with sulfuric acid, containing 16-20% P2O5 and 11-12% sulphur. This is a superphosphate explicitly covered by Chapter 31 Note 3(a)(iii) as a phosphatic fertilizer.
Triple Superphosphate Fertilizer
Triple superphosphate (TSP) fertilizer, a highly concentrated phosphatic fertilizer with about 46% P2O5, made by reacting phosphate rock with phosphoric acid. It is a superphosphate covered by Chapter 31 Note 3(a)(iii) under heading 31.03.