HS 310530 Diammonium hydrogenorthophosphate (diammonium phosphate)
Quick Answer: Diammonium hydrogenorthophosphate (diammonium phosphate) imported under HS 310530 enters the UK at 6.00% ad valorem, the EU at a rate to be determined by TARIC, and the US duty-free under the MFN rate. This HS code specifically covers diammonium hydrogenorthophosphate, commonly known as diammonium phosphate (DAP), a widely used inorganic fertilizer. Significant trade considerations include potential agricultural subsidies or import restrictions in certain regions. CustomTariffs aggregates this data to assist businesses in navigating international trade regulations.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3105300000 | 6.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3105300000 | — | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3105300000 | Free | — | ["t"] |
Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).
Data compiled and presented by HSRates.
How to Classify This HS Code?
What products does HS 310530 cover?
This subheading covers diammonium hydrogenorthophosphate, commonly known as diammonium phosphate (DAP). As per the World Customs Organization's Harmonized System Nomenclature, this product is a specific type of mineral or chemical fertilizer. Official definitions from sources like the USITC Harmonized Tariff Schedule (HTS) and the EU's TARIC database confirm that it is primarily used for its high nitrogen and phosphorus content, essential for plant growth, and is typically presented in granular or powder form for agricultural application.
What falls outside HS 310530?
The following products are excluded from HS 310530: other diammonium salts not specifically hydrogenorthophosphate, monoammonium phosphate (MAP), or other mixed fertilizers containing diammonium hydrogenorthophosphate but classified under different subheadings of heading 3105. For instance, blended fertilizers with multiple nutrient components, or fertilizers presented in liquid form, would typically fall under other HS codes within Chapter 31, requiring careful examination of their specific composition and presentation.
What are common classification mistakes for HS 310530?
A common error is misclassifying diammonium hydrogenorthophosphate when it is part of a complex mixture or formulation. According to General Rule of Interpretation (GRI) 1 and GRI 3, the classification should be based on the essential character of the product. If DAP is a minor component in a broader fertilizer blend, or if it is chemically modified or combined with other substances in a way that alters its essential character, it may be classified elsewhere, necessitating a thorough analysis of the product's composition.
How should importers classify products under HS 310530?
The correct procedure for classifying products under HS 310530 involves first confirming the chemical identity of the imported substance. Importers and customs brokers must obtain a detailed product specification sheet or certificate of analysis that explicitly identifies the product as diammonium hydrogenorthophosphate. Cross-referencing this information with the WCO HS Explanatory Notes and the specific tariff schedule of the importing country, such as the UK Trade Tariff, is crucial to ensure accurate classification.
How is the duty calculated for products under HS 310530?
A shipment of 1,000 kilograms of diammonium phosphate declared at a customs value of $500 USD would attract a US duty of $0.00. This is because the USITC Harmonized Tariff Schedule (HTS) lists a Most Favored Nation (MFN) duty rate of Free (0%) for HS code 3105.30. Therefore, the calculation is 0% × $500 USD = $0.00 USD.
Which trade agreements reduce duties for HS 310530?
Several free trade agreements may reduce the applicable duty rate for HS 310530, including the United States-Mexico-Canada Agreement (USMCA), which can result in a Free duty rate for qualifying goods originating from Canada or Mexico. Additionally, the Generalized System of Preferences (GSP) may offer duty-free entry for eligible goods from certain developing countries. To claim these preferences, importers typically require a self-certified origin statement for USMCA or a GSP Form A for GSP beneficiaries, depending on the specific agreement and importing country's regulations.
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FAQ
What are the typical import duty rates for Diammonium hydrogenorthophosphate (diammonium phosphate) under HS code 310530?
The import duty rates for HS code 310530, Diammonium hydrogenorthophosphate (diammonium phosphate), vary by country. For example, under the United States Harmonized Tariff Schedule (USHTS), the Most Favored Nation (MFN) duty rate is 6.00% ad valorem. However, preferential rates may apply under trade agreements. For instance, goods originating from countries with a Free Trade Agreement (FTA) with the US may have a duty rate of Free. It is crucial to consult the specific tariff schedule of the importing country and verify the country of origin to determine the applicable duty rate. Sources like the US International Trade Commission (USITC) provide detailed tariff information.
How is the import duty for Diammonium hydrogenorthophosphate (HS 310530) calculated, and can you provide an example?
The import duty for HS code 310530 is typically calculated on an ad valorem basis, meaning it is a percentage of the declared value of the goods. For example, if the MFN duty rate is 6.00% and the declared value of a shipment of Diammonium hydrogenorthophosphate is $10,000 USD, the import duty would be calculated as: $10,000 (Value) × 0.06 (Duty Rate) = $600 USD. Always ensure the declared value is accurate and in compliance with customs valuation rules.
What are the key classification criteria for Diammonium hydrogenorthophosphate (HS 310530)?
HS code 310530 specifically covers Diammonium hydrogenorthophosphate, also known as diammonium phosphate (DAP). The primary classification criterion is the chemical composition and identity of the product. It must be the diammonium salt of orthophosphoric acid. Products that are mixtures containing diammonium hydrogenorthophosphate but are not solely this compound, or are in a different physical form (e.g., granulated with other nutrients not specified under this heading), may fall under different HS codes, such as those for compound fertilizers (e.g., 3105.20 if it contains ammonium nitrate or 3105.90 for other fertilizers). Verification of the product's chemical analysis and intended use is essential for correct classification.
What documentation is typically required for importing Diammonium hydrogenorthophosphate (HS 310530)?
When importing Diammonium hydrogenorthophosphate (HS 310530), standard import documentation is usually required, including a commercial invoice, packing list, and bill of lading or air waybill. Additionally, a certificate of origin is often necessary, especially if preferential duty rates are claimed under a Free Trade Agreement. Depending on the importing country's regulations and the product's end-use, a chemical analysis certificate or a phytosanitary certificate might also be requested to verify the product's composition and ensure it meets safety and quality standards. Importers and customs brokers should consult the customs authority of the destination country for a comprehensive list of required documents.
How do trade agreements, such as FTAs, impact the duty rates for HS code 310530?
Trade agreements, particularly Free Trade Agreements (FTAs), can significantly reduce or eliminate import duties for goods classified under HS code 310530. For example, if a country has an FTA with the United States, Diammonium hydrogenorthophosphate originating from that FTA partner country may be eligible for a duty rate of Free, compared to the standard MFN rate. To benefit from these preferential rates, importers must provide proof of origin, typically through a Certificate of Origin or an origin declaration on the commercial invoice, as stipulated by the specific FTA. It is vital for importers and customs brokers to understand the rules of origin for each applicable trade agreement to correctly claim preferential treatment.