2832.30.10.00/Sodium Thiosulfate Pentahydrate Crystals/China

Sodium Thiosulfate Pentahydrate Crystals from China

Sodium thiosulfate pentahydrate (Na2S2O3·5H2O) is a colorless crystalline compound used primarily in photography as a fixer to remove unexposed silver halides from film. It falls under HTS 2832.30.10.00 as it is specifically the sodium salt of thiosulfuric acid, classified among thiosulfates in Chapter 28 for chemically defined inorganic compounds.

Duty Rate — China → United States

39%

Rate breakdown

9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

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Import Tips

• Verify purity and hydration state (e.g

• pentahydrate) via Certificate of Analysis to confirm classification under 2832.30.10.00 and avoid reclassification as anhydrous

• Include Safety Data Sheet (SDS) and proper UN packaging certification for Hazard Class 8 (corrosive) to prevent customs delays

• Label shipments clearly as 'Sodium Thiosulfate' to match HTS description; impure blends may shift to 2842 for complex salts