Chapter 3104 — Customs Tariff Headings

Anti-Caking Potassium Chloride Fertilizer

Anti-caking potassium chloride fertilizer is potassium chloride treated with anti-caking agents to ensure free-flowing application in humid climates. The additives do not alter the chemical identity of the potassium chloride, so it remains classified as potassium chloride under this tariff item.

Bulk Potassium Chloride Fertilizer 52% K2O

Bulk potassium chloride fertilizer at 52% K2O is used for large-scale field application in potassium-deficient soils. It is a potassic fertilizer not in retail form, fitting this tariff item.

Bulk Potassium Chloride for Blending Operations

Bulk potassium chloride for blending operations is imported in large quantities for fertilizer blending plants to create custom NPK formulations. It is pure potassic fertilizer not in retail form, fitting the description of potassium chloride under this tariff item.

Certified Organic Potassium Chloride Fertilizer

Certified organic potassium chloride fertilizer is produced through mining and minimal processing to meet organic farming standards. It is chemically potassium chloride and used as a potassic fertilizer, qualifying under this tariff item.

Crop-Specific Potassium Chloride for Tobacco

Crop-specific potassium chloride for tobacco is a specialty formulation optimized for tobacco crops to improve leaf quality and disease resistance. It is chemically potassium chloride for agricultural use, fitting this tariff item.

Granular Potassium Chloride 60% K2O Fertilizer

Granular potassium chloride fertilizer with 60% K2O equivalent is designed for soil application in crops like potatoes and tomatoes. It is potassium chloride used as a potassic fertilizer, falling under this tariff item.

High-Purity Agricultural Potassium Chloride

High-purity agricultural potassium chloride with 99%+ purity is used for organic farming and high-value crops. It is potassium chloride fertilizer with low impurity levels, qualifying under this tariff item.

Low-K Muriate of Potash 45% K2O for Tobacco

Low-K muriate of potash with 45% K2O is formulated for chloride-tolerant crops like tobacco to enhance yield and quality. It is potassium chloride fertilizer under the 62% K2O limit, fitting this tariff item.

Muriate of Potash 50% K2O Granular Fertilizer

Granular potassium chloride fertilizer with 50% K2O is used for supplying potassium to crops like potatoes and tomatoes. It is a potassic fertilizer, fitting this tariff item.

Muriate of Potash Fertilizer

Muriate of potash, chemically known as potassium chloride (KCl), is a widely used potassic fertilizer providing essential potassium for plant growth. It matches the legal definition of potassium chloride under this tariff item.

Potassium Chloride 58% K2O Agricultural Grade

Potassium chloride 58% K2O agricultural grade is applied to correct potassium deficiencies in soils for corn and soybeans. It is a potassium chloride-based potassic fertilizer, fitting this tariff item.

Potassium Chloride for Drip Irrigation

Potassium chloride for drip irrigation is a fine powder specifically sized for irrigation systems in orchards and vineyards. It is a potassic mineral fertilizer that dissolves completely, fitting this tariff item.

Standard MOP 60% K2O Crop Nutrient

Standard MOP 60% K2O crop nutrient is muriate of potash for general crop nutrition in fruits and vegetables. It is potassium chloride with K2O not over 62%, fitting this tariff item.

Water-Soluble Potassium Chloride Fertilizer

Water-soluble potassium chloride fertilizer is used in fertigation systems for greenhouse crops and hydroponics. It is a highly soluble form of potassium chloride, qualifying under this tariff item.

Winterizer Potassium Chloride Fertilizer

Winterizer potassium chloride fertilizer is applied late-season to enhance plant hardiness before winter dormancy. It is potassium chloride fertilizer with coarse granules for deep root penetration, fitting this tariff item.

Crystal Potassium Sulfate SOP Fertilizer

Large crystal potassium sulfate (SOP) fertilizer for broadcast application in field crops. This product is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05, such as tablets or retail packs.

Granular Potassium Sulfate Fertilizer

Granular potassium sulfate (SOP) fertilizer with 50% potassium oxide and 18% sulfur, used for chloride-sensitive crops. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in retail forms or packages described in heading 31.05.

High-Purity Potassium Sulfate for Greenhouse Use

Ultra-pure potassium sulfate crystals for greenhouse use, minimizing impurities for sensitive ornamentals. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.

SOP 50% K2O Bulk Fertilizer

Bulk potassium sulfate fertilizer standardized at 50% potash (K2O) content, used in tobacco and potato farming. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.

Sulfur-Potassium Sulfate Blend Fertilizer

Potassium sulfate enhanced with elemental sulfur for acidifying soils in high-pH areas. The primary component is potassium sulfate, a potassic mineral fertilizer, and the added sulfur is not a fertilizing element (N, P, or K) for Chapter 31 purposes. It is not put up in the forms or packages described in heading 31.05.

Water-Soluble Potassium Sulfate Powder

Fine powder potassium sulfate designed for fertigation and foliar applications, supplying essential K2O and sulfur without chloride. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.

Granular Potassium Fertilizer 0-0-50

Granular potassium fertilizer with a 0-0-50 analysis, providing 50% potassium oxide (K2O) for sidedress applications. It is a potassic mineral fertilizer not otherwise specified under heading 31.04, as it does not match the enumerated salts in chapter note 4.

Liquid Potassium Thiosulfate Fertilizer

Liquid potassium thiosulfate fertilizer containing 25% K2S2O3, used for in-furrow and foliar applications. As a liquid potassic fertilizer not specified in the enumerated salts of chapter note 4, it falls under tariff item 3104.90.00 as 'Other'.

Mono Potassium Phosphate (MKP) Fertilizer

Water-soluble mono potassium phosphate (KH2PO4) fertilizer for fertigation, providing both potassium and phosphorus. Although it contains phosphorus, it is primarily a potassic fertilizer and is not excluded by chapter note 4, so it is classifiable under tariff item 3104.90.00.

Organic Potassium Sulfate Fertilizer

OMRI-listed potassium sulfate fertilizer derived from natural sulfate salts, suitable for certified organic production. As a potassic fertilizer not matching the enumerated salts in chapter note 4, it falls under tariff item 3104.90.00 as 'Other'.

Potassium Chloride Fertilizer (Muriate of Potash)

Granular potassium chloride (KCl), also known as muriate of potash, is a primary potassic fertilizer providing essential potassium for plant growth. It is not excluded by chapter note 4 and is classifiable under tariff item 3104.90.00 as 'Other' potassic fertilizer.

Potassium Magnesium Sulfate Fertilizer

Langbeinite ore-based fertilizer containing potassium, magnesium, and sulfur, used in organic farming. As a mineral potassic fertilizer not matching the specific salts in chapter note 4, it is classifiable under tariff item 3104.90.00.

Potassium Nitrate Fertilizer

Crystalline potassium nitrate (KNO3) fertilizer delivering potassium and nitrogen for greenhouse and hydroponic production. It is not specifically enumerated in chapter note 4 and is classifiable under tariff item 3104.90.00 as 'Other' potassic fertilizer.

Potassium Sulfate Fertilizer (Sulfate of Potash)

Crystalline potassium sulfate (K2SO4), also called sulfate of potash, supplies potassium and sulfur to crops without chloride. It is not enumerated in chapter note 4 and is classifiable under tariff item 3104.90.00 as 'Other' potassic fertilizer.

Sulpomag Potassium-Magnesium Fertilizer

Granulated sulpomag (K2SO4·2MgSO4) providing potassium, magnesium, and sulfur for crop nutrition. As a potassic mineral fertilizer not matching the enumerated salts in chapter note 4, it is classifiable under tariff item 3104.90.00.