Duty Rate (from China)
Subheadings
Products classified under Tariff item 3103.90
Calcined Natural Phosphate Fertilizer
Calcined natural phosphate fertilizer, produced by heat-treating natural phosphates of heading 25.10 beyond simple impurity removal. This process enhances reactivity for agricultural use, and the product is explicitly covered by Chapter 31 Note 3(a)(ii) as a phosphatic fertilizer.
3103.90.00Calcium Hydrogenorthophosphate Fertilizer
Calcium hydrogenorthophosphate (dicalcium phosphate) fertilizer containing at least 0.2% fluorine by weight on a dry anhydrous basis. This product is specifically listed in Chapter 31 Note 3(a)(iv) as a phosphatic fertilizer under heading 31.03.
3103.90.00Rock Phosphate Heat-Treated Fertilizer
Rock phosphate that has been heat-treated beyond simple impurity removal, such as calcination, to improve its fertilizing properties. This product falls under Chapter 31 Note 3(a)(ii) as a calcined natural phosphate fertilizer.
3103.90.00Single Superphosphate Granules
Single superphosphate (SSP) granules, produced by treating phosphate rock with sulfuric acid, containing 16-20% P2O5 and 11-12% sulphur. This is a superphosphate explicitly covered by Chapter 31 Note 3(a)(iii) as a phosphatic fertilizer.
3103.90.00Triple Superphosphate Fertilizer
Triple superphosphate (TSP) fertilizer, a highly concentrated phosphatic fertilizer with about 46% P2O5, made by reacting phosphate rock with phosphoric acid. It is a superphosphate covered by Chapter 31 Note 3(a)(iii) under heading 31.03.