| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 3103900100 | Doc | 55.0% | CN | US | 2025-05-12 |
| 3103190000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 3105300000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 2835292000 | Doc | 56.5% | CN | US | 2025-05-12 |
Diammonium Hydrogen Phosphate
Diammonium hydrogen phosphate (DAP), also known as diammonium phosphate, is an inorganic salt with the formula (NH₄)₂HPO₄. It is a white, crystalline solid highly soluble in water.
Material Properties:
- Chemical Formula: (NH₄)₂HPO₄
- Molecular Weight: 132.06 g/mol
- Appearance: White crystalline solid
- Solubility: Highly soluble in water; insoluble in most organic solvents.
- pH (1% solution): 7.5–8.5 (slightly alkaline)
- Hygroscopicity: Hygroscopic (absorbs moisture from the air)
- Melting Point: Decomposes upon heating.
Purpose & Function:
DAP is primarily used as a fertilizer, providing both nitrogen and phosphorus, essential nutrients for plant growth. It serves as a source of both readily available and slow-release phosphorus. Beyond fertilization, it has diverse applications:
- Flame Retardant: Used in fire extinguishing agents and as a component of intumescent coatings.
- Buffering Agent: Maintains pH stability in various chemical processes and food products.
- Yeast Nutrient: Provides nitrogen and phosphorus for yeast growth in baking and fermentation.
- Water Treatment: Used to control scale and corrosion in water systems.
- Metal Surface Treatment: Used in processes like phosphatizing.
- Microbial Culture Media: Serves as a nutrient source in laboratory settings.
Usage Scenarios:
- Agriculture: Broadly applied to various crops, especially in regions with phosphorus-deficient soils. Applied directly to the soil or used in liquid fertilizers.
- Food Industry: Used in baking powders, as a buffering agent in processed cheeses, and as a nutrient for yeast.
- Fire Safety: Incorporated into dry chemical fire extinguishers and coatings for textiles and wood.
- Industrial Applications: Used in metal finishing, water treatment plants, and chemical manufacturing processes.
- Laboratory Research: Utilized in preparing culture media for microbial growth and biochemical experiments.
Common Types & Grades:
- Industrial Grade: Typically 75-85% purity, used in non-food applications.
- Fertilizer Grade: High purity, formulated for agricultural use.
- Food Grade: Meets stringent purity standards for use in food products.
- Technical Grade: Used in various industrial processes where high purity is not essential.
- Monoammonium Phosphate (MAP) vs. Diammonium Phosphate (DAP): MAP contains a higher proportion of phosphorus and is more acidic, while DAP provides more nitrogen and is slightly alkaline. The choice between the two depends on soil pH and specific nutrient requirements.
Diammonium hydrogen phosphate is a chemical fertilizer containing nitrogen, phosphorus, and potassium. It is commonly used in agriculture as a source of plant nutrients, promoting growth and increasing crop yields. It can be applied directly to the soil or used in the production of compound fertilizers.
The following HS codes are relevant to Diammonium hydrogen phosphate, based on the provided information:
-
3105300000: Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg: Diammonium hydrogenorthophosphate (Diammonium phosphate).
- 31: Chapter 31 covers mineral or chemical fertilizers.
- 05: Heading 3105 specifically refers to fertilizers containing nitrogen, phosphorus, and potassium, or other fertilizers.
- 30: Subheading 310530 denotes Diammonium hydrogenorthophosphate (Diammonium phosphate).
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3103900100: Mineral or chemical fertilizers, phosphatic: Other.
- 31: Chapter 31 covers mineral or chemical fertilizers.
- 03: Heading 3103 specifically refers to phosphatic fertilizers.
- 90: Subheading 310390 denotes other phosphatic fertilizers.
- 01: Further specifies the classification.
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2835292000: Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined: Phosphates: Other: Of triammonium.
- 28: Chapter 28 covers inorganic chemicals.
- 35: Heading 2835 specifically refers to phosphinates, phosphonates, and phosphates.
- 29: Subheading 283529 denotes phosphates.
- 20: Further specifies triammonium phosphates.
Tax Information:
- For HS code 3105300000 and 3103190000, the total tax rate is 55.0%, comprising a base tariff of 0.0% and an additional tariff of 25.0%. This additional tariff is scheduled to increase to 30.0% after April 2, 2025.
- For HS code 2835292000, the total tax rate is 56.5%, comprising a base tariff of 1.5% and an additional tariff of 25.0%. This additional tariff is scheduled to increase to 30.0% after April 2, 2025.
Customer Reviews
The site is good overall, but the layout for the HS codes (like 2835292000) is a bit dense and hard to quickly scan. While all the info is there, a little more visual clarity would be helpful for fast referencing.
The comparison of MAP vs. DAP was a nice touch. It helped me understand which fertilizer grade was best for my specific soil conditions. The tariff information is clear, but the upcoming increase on April 2nd is something I need to keep in mind.
I appreciate the detailed material properties listed for Diammonium Hydrogen Phosphate. The information on solubility and pH was exactly what I needed for my lab research. The images are also helpful for visual confirmation.
This site made finding the right HS code for DAP so easy! The breakdown for 3105300000 was perfect for my US import, and knowing the 55.0% tariff rate upfront is a huge time saver.