Langbeinite Potassium Sulfate Mineral Fertilizer
Natural langbeinite (sulfate of potash magnesia) mined and processed as potassium sulfate source with added magnesium. Falls under HTS 3104.30.00.00 as potassium sulfate potassic fertilizer, distinguished from pure chemicals by agricultural application. Popular for organic farming due to natural mineral origin.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If calcined natural phosphates present
Calcined phosphates of 2510 fall under 3103 note 3(a)(ii), even with potassic mixes.
If unprocessed mineral earths
Natural mineral products not chemically processed stay in Chapter 25.
If sold in retail consumer packs
Any retail-packaged fertilizer mixtures go to 3105 regardless of composition.
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Import Tips & Compliance
• Provide mining origin certificates for natural mineral status verification
• Test for heavy metals; organic certifiers require clean analysis
• Specify not heat-treated beyond impurity removal to avoid 3103 classification
Related Products under HTS 3104.30.00.00
Granular Potassium Sulfate Fertilizer
Granular potassium sulfate (SOP) is a premium water-soluble fertilizer containing 50% potassium oxide and 18% sulfur, used primarily for chloride-sensitive crops like tobacco, potatoes, and fruits. It falls under HTS 3104.30.00.00 as a potassic mineral fertilizer consisting of potassium sulfate not put up for retail sale. The granular form ensures even distribution and slow release in soil.
Water-Soluble Potassium Sulfate Powder
Fine powder potassium sulfate designed for fertigation and foliar applications, supplying essential K2O and sulfur without chloride. Classified under HTS 3104.30.00.00 as it matches the potassium sulfate description in Chapter 31 for agricultural fertilizers. Ideal for hydroponics and drip irrigation systems.
SOP 50% K2O Bulk Fertilizer
Bulk potassium sulfate fertilizer standardized at 50% potash (K2O) content, commonly used in tobacco and potato farming. It qualifies for HTS 3104.30.00.00 as pure potassium sulfate meeting Chapter 31 potassic fertilizer criteria, excluding retail packaging. Provides dual sulfur nutrition for improved crop quality.
High-Purity Potassium Sulfate for Greenhouse Use
Ultra-pure potassium sulfate crystals for controlled greenhouse environments, minimizing impurities for sensitive ornamentals. Classified HTS 3104.30.00.00 as potassic fertilizer potassium sulfate for agricultural use, not industrial chemicals. Dissolves rapidly for precise nutrient delivery.
Sulfur-Potassium Sulfate Blend Fertilizer
Potassium sulfate enhanced with elemental sulfur for acidifying soils in high-pH areas. Meets HTS 3104.30.00.00 as primary potassium sulfate component qualifies as potassic fertilizer. Used for crops like blueberries requiring both K and S nutrition.
Crystal Potassium Sulfate SOP Fertilizer
Large crystal potassium sulfate for standard broadcast application in field crops. HTS 3104.30.00.00 classification as pure potassium sulfate potassic fertilizer not in retail form. Provides season-long potassium availability with sulfur bonus.