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Of ammonium

Salts of oxometallic or peroxometallic acids: > Tungstates (wolframates) > Of ammonium

Duty Rate (from China)

30.5%
MFN Base Rate5.5%
9903.91.01+25%

Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter

9903.03.03+0%

Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

Total Effective Rate30.5%
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Products classified under HTS 2841.80.00.10

Ammonium Paratungstate

Ammonium paratungstate (APT) is a white crystalline powder with the formula (NH4)10[H2W12O42]·4H2O, used primarily as an intermediate in tungsten metal production. It falls under HTS 2841.80.0010 as it is a tungstate salt of ammonium, specifically a peroxometallic acid derivative classified in this subheading for ammonium tungstates.

Ammonium Metatungstate

Ammonium metatungstate (AMT) is a soluble powder (NH4)6[H2W12O40]·xH2O used in catalysts, fire-retardant treatments, and plating solutions. Classified under HTS 2841.80.0010 as an ammonium salt of tungstic acid, fitting the peroxometallic salts category.

Ammonium Tungstate Powder 99% Pure

High-purity ammonium tungstate powder (99% assay) serves as a source for tungsten compounds in X-ray screens and phosphors. It is an ammonium salt of wolframic acid, directly matching HTS 2841.80.0010 for ammonium tungstates.

Ammonium Wolframate Crystals

Ammonium wolframate crystals are metatungstate form used in photographic chemicals and corrosion inhibitors. As a defined inorganic salt of tungsten, it precisely fits HTS 2841.80.0010 under ammonium tungstates.

Technical Grade Ammonium Tungstate

Technical grade ammonium tungstate (85-90% purity) is used in fabric fireproofing and leather tanning. It qualifies under HTS 2841.80.0010 as an ammonium peroxometallic salt despite lower purity, meeting basic tungstate definition.

Ammonium 12-Tungstophosphate

Ammonium 12-tungstophosphate is a heteropolyacid salt (NH4)3PW12O40 used as an industrial catalyst. As a complex tungstate of ammonium, it falls under HTS 2841.80.0010 per notes on complex salts.

Diammonium Tungstate Solution Concentrate

Concentrated aqueous solution of diammonium tungstate used in wire drawing lubricants. Though in solution, the active ingredient is ammonium tungstate salt, classified under HTS 2841.80.0010.

Ammonium Tungstate Hydrate Flakes

Flaked ammonium tungstate hydrate ((NH4)2O·12WO3·10H2O) for analytical reagents and plating baths. The hydrated salt form remains classified as ammonium tungstate under HTS 2841.80.0010.

High-Purity Ammonium Paratungstate Pentahydrate

99.9% pure ammonium paratungstate pentahydrate (APT·5H2O) for semiconductor precursor applications. Meets strict chemically defined standards for HTS 2841.80.0010 classification.

Ammonium Silicotungstate

Ammonium silicotungstate ((NH4)4SiW12O40) used in ion-exchange resins and analytics. As a complex tungstate salt of ammonium, properly classified in HTS 2841.80.0010.