Phosphinates (hypophosphites) and phosphonates (phosphites)
N353043 · 2025-09-15 — The tariff classification of Aluminum Hypophosphite from India
Aluminum Hypophosphite is an inorganic chemical compound in white crystalline powder form. You state that the product’s chemical formula is Al(POH) and is 98% pure. You describe this product’s principal uses as halogen-free flame retardant for engineering plastics, including PET, PBT, TPU, ABS, PA, and PU foam. The applicable subheading for Aluminum Hypophosphite will be 2835.10.0000, Harmonized Tariff Schedule of the United States (HTSUS), which provides for Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined:…
N076275 · 2009-10-09 — The tariff classification of Tribasic lead sulfate, CAS No. 12202-17-4, Dibasic lead phosphite, CAS No. 1334-40-7, and Dibasic lead phthalate, CAS No. 57142-78-6, from Korea
Tribasic lead sulfate and Dibasic lead phosphate are inorganic compounds indicated for use as heat stabilizers in the preparation of PVC compounds. Dibasic lead phthalate is an aromatic polycarboxylic acid also used as a heat stabilizer in the preparation of PVC compounds. The applicable subheading for Tribasic lead sulfate will be 2833.29.5100, Harmonized Tariff Schedule of the United States (HTSUS), which provides for Sulfates; alums; peroxosulfates (persulfates): Other sulfates: Other: Other. The rate of duty will be 3.7 percent ad valorem. The applicable subheading for Dibasic lead…
N028031 · 2008-05-21 — The tariff classification of Sodium Hypo Phosphate (CAS # 7681-53-0) from China
You state in your letter that you plan to import Sodium Hypo Phosphate for use as a pharmaceutical intermediate. The applicable subheading for the Sodium Hypo Phosphate will be 2835.10.0000, Harmonized Tariff Schedule of the United States (HTSUS), which provides for Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined: Phosphinates (hypophosphites), phosphonates (phosphites). The rate of duty will be 3.1 percent ad valorem. Duty rates are provided for your convenience and are subject to change. The text of the most recent…
L88598 · 2006-02-01 — The tariff classification of Phosphorus Acid, Diammonium Phosphite and Potassium Phosphite from China
The applicable subheading for Phosphorus Acid will be 2811.19.6050, Harmonized Tariff Schedule of the United States (HTSUS), which provides for Other inorganic acids and other inorganic oxygen compounds of nonmetals: Other inorganic acids: Other: Other: Other. The rate of duty will be 4.2 percent ad valorem. The applicable subheading for the Diammonium Phosphite and Potassium Phosphite will be 2835.10.0000, Harmonized Tariff Schedule of the United States (HTSUS), which provides Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically…
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