Potassium Sulfate Fertilizer (Sulfate of Potash)
Crystalline potassium sulfate (K2SO4) fertilizer, also called sulfate of potash, supplies potassium and sulfur to crops without chloride. Classified under HTS 3104.90.0100 as 'other' potassic fertilizers not enumerated in prior headings or retail packaged.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for consumer retail packaging
Retail forms of potassic fertilizers fall under 3105 even if chemically identical.
If pure industrial grade exceeding fertilizer purity limits
Chemically pure salts outside fertilizer specifications move to Chapter 28 inorganic chemicals.
If classified as potassium chloride and magnesium blends
Specific double salts have designated subheadings within potassic fertilizers.
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Import Tips & Compliance
• Include lab analysis showing sulfate and potassium content to distinguish from muriate of potash
• Confirm not mixed with organic substances that could shift classification outside Chapter 31
• Label clearly as agricultural fertilizer to avoid misclassification as industrial chemicals
Related Products under HTS 3104.90.01.00
Potassium Chloride Fertilizer (Muriate of Potash)
Granular potassium chloride (KCl), commonly known as muriate of potash, is a primary potassic fertilizer providing essential potassium for plant growth. It falls under HTS 3104.90.0100 as a mineral potassic fertilizer not specifically covered by headings 3102 or 3103, and not packaged for retail in heading 3105.
Mono Potassium Phosphate (MKP) Fertilizer
Water-soluble mono potassium phosphate (KH2PO4) provides potassium and phosphorus for fertigation systems. It qualifies under HTS 3104.90.0100 as an 'other' potassic fertilizer since phosphorus content doesn't trigger superphosphate classification in 3103.
Potassium Nitrate Fertilizer
Crystalline potassium nitrate (KNO3) delivers potassium and nitrogen for greenhouse and hydroponic production. Falls under HTS 3104.90.0100 as other potassic fertilizers not specifically covered by ammonium nitrate mixtures in heading 3102.
Potassium Magnesium Sulfate Fertilizer
Langbeinite ore-based fertilizer containing potassium, magnesium, and sulfur for organic farming. Classified HTS 3104.90.0100 as mineral potassic not fitting specific salt descriptions or phosphatic categories.
Sulpomag Potassium-Magnesium Fertilizer
Granulated sulpomag (K2SO4·2MgSO4) provides potassium, magnesium, and sulfur for crop nutrition. HTS 3104.90.0100 covers this as other potassic mineral fertilizer not matching enumerated chemical salts.
Water-Soluble Potassium Fertilizer Blend 13-0-46
Soluble fertilizer blend with 13% nitrogen and 46% potassium oxide for foliar and fertigation. Classifies under HTS 3104.90.0100 as potassic-dominant not meeting specific 3102 mixture criteria.