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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 5.5% | +25.0% | 30.5% |
| 🇲🇽Mexico | 5.5% | — | 5.5% |
| 🇨🇦Canada | 5.5% | — | 5.5% |
| 🇩🇪Germany | 5.5% | — | 5.5% |
| 🇯🇵Japan | 5.5% | — | 5.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other complex salts
Silico derivatives may qualify as complex salts under 2842 note.
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Import Tips & Compliance
• Molecular weight confirmation distinguishes from simple tungstates
• Ion-exchange end-use declaration
• Stable solid form simplifies shipping
Related Products 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.