Potassium Stannate Trihydrate
Potassium stannate trihydrate (K2SnO3·3H2O) is a white crystalline powder used primarily as a source of stannate ions in chemical plating processes for metals. It falls under HTS 2841.90.30.00 as it is specifically the potassium salt of stannic acid, a peroxometallic acid derivative. This chemically defined inorganic compound is essential for electroless tin plating on substrates like circuit boards.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily as a tin compound rather than stannate salt
Antimony oxides, chlorides, and other tin compounds fall under 2825 if not specifically peroxometallic salts
If when imported as a complex salt mixture with other metals
Double or complex salts of inorganic bases are classified in 2842 per Chapter Note 6
If sold as prepared chemical for specific industrial plating baths
Mixtures of chemicals for specific uses may shift to 3824 instead of pure compounds
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Import Tips & Compliance
• Verify purity and hydration state via Certificate of Analysis to match HTS description; ensure MSDS includes hazard classification for DOT compliance
• Common pitfall: mislabeling as general tin compounds leads to reclassification
Related Products under HTS 2841.90.30.00
Anhydrous Potassium Stannate
Anhydrous potassium stannate (K2SnO3) is a high-purity, water-free form used in advanced electroplating solutions for corrosion-resistant tin coatings. Classified under HTS 2841.90.30.00 as the potassium salt of stannic acid, meeting Chapter 28 criteria for chemically defined oxometallic salts. It provides stable stannate ions without hydration interference in formulations.
Technical Grade Potassium Stannate
Technical grade potassium stannate is a commercial powder (typically 40-60% K2SnO3) for immersion tin plating in electronics manufacturing. It qualifies for HTS 2841.90.30.00 as the designated potassium salt of stannic acid, despite minor impurities allowed in technical grades. Used to create uniform tin layers on copper for solderability.
High Purity Potassium Stannate 99%
99% pure potassium stannate crystals for laboratory and semiconductor applications requiring ultra-clean stannate sources. Precisely classified under HTS 2841.90.30.00 as chemically defined potassium stannate per Chapter 28 Note 1. Essential for atomic layer deposition of tin oxide films.
Potassium Stannate for Glass Coating
Specialty potassium stannate formulation for transparent conductive oxide coatings on glass substrates. Falls under HTS 2841.90.30.00 as the base potassium stannate compound before application. Provides tin source for ITO (indium tin oxide) production.
Electroless Plating Grade Potassium Stannate
Electroless plating grade potassium stannate optimized for stable bath life in PCB manufacturing. HTS 2841.90.30.00 classification as pure potassium stannate salt. Delivers consistent tin deposition rates for ENIG processes.
ACS Reagent Potassium Stannate
ACS reagent grade potassium stannate meeting American Chemical Society purity standards for analytical chemistry. Classified HTS 2841.90.30.00 as chemically defined stannate salt. Used in qualitative analysis of tin and qualitative cation testing.