Sodium Sulfite Anhydrous Powder
Pure anhydrous sodium sulfite (Na2SO3) in fine powder form, used primarily as a reducing agent and antioxidant in chemical manufacturing. It falls under HTS 2832.10.00.00 as a sodium sulfite, a simple inorganic salt of sulfurous acid classified in Chapter 28 for chemically defined inorganic compounds.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stabilized with organic substances like formaldehyde
Stabilized dithionites/sulfites fall under 2831 per Chapter 28 notes, shifting from pure sodium sulfites.
If blended with other chemicals for retail or specific formulations
Mixtures not chemically defined as single compounds are classified as chemical preparations in 3824.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify purity levels exceed 97% for correct classification; provide Certificate of Analysis (COA) to avoid reclassification as mixtures
• Ensure packaging prevents moisture absorption to maintain anhydrous state during transit
Related Products under HTS 2832.10.00.00
Food-Grade Sodium Sulfite Crystals
Crystalline sodium sulfite meeting FCC standards for use as a preservative in dried fruits, wines, and seafood. Classified under HTS 2832.10.00.00 as sodium sulfites, explicitly covered in the sulfites subheading of Chapter 28.
Technical Grade Sodium Sulfite Solution 40%
Aqueous solution containing 40% sodium sulfite by weight, used in water treatment and paper pulping as an oxygen scavenger. It qualifies for HTS 2832.10.00.00 as chemically defined sodium sulfites, regardless of aqueous form.
Sodium Sulfite Meta Bisulfite Precursor
High-purity sodium sulfite granules serving as a precursor for sodium metabisulfite production in food and pharma. Falls under HTS 2832.10.00.00 due to its chemical definition as Na2SO3 in Chapter 28.
Industrial Sodium Sulfite Flakes
Flaked sodium sulfite for large-scale use in textile bleaching and photography developers as a reducing agent. Classified in HTS 2832.10.00.00 as a sodium sulfite per the sulfites; thiosulfates heading.
Pharmaceutical Grade Sodium Sulfite USP
USP-compliant sodium sulfite powder for use as an excipient in injectable drugs and antioxidants in pharmaceuticals. It is a chemically defined sodium sulfite under HTS 2832.10.00.00 in Chapter 28.
Sodium Sulfite for Wine Preservation
Granular sodium sulfite specifically for winemaking to prevent oxidation and microbial growth. Covered by HTS 2832.10.00.00 as a sodium sulfite, a standard inorganic compound in this chapter.