Sodium Dithionite 88% Technical Grade
Sodium dithionite (Na2S2O4), also known as sodium hydrosulfite, at 88% purity in powder form for industrial applications such as textile bleaching and vat dyeing. This chemically defined inorganic compound falls under HTS 2831.10.5000 as a dithionite of sodium, other than those stabilized with organic substances. It is commonly used in reducing processes in chemical manufacturing.
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 urea or starch
Chapter note excludes stabilized dithionites from 'other' subheading, placing them in the specific stabilized category.
If blended with other chemicals for retail or specific formulations
Mixtures not purely chemically defined sodium dithionite fall under chemical preparations in Chapter 38.
If in solution form exceeding 35% concentration
Hydrogen peroxide solutions are classified separately; analogous purity rules may shift non-pure forms.
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Import Tips & Compliance
• Verify purity and chemical composition via lab analysis to confirm classification under 2831.10.5000, avoiding misclassification as stabilized products in 2831.10.10
• Include Safety Data Sheets (SDS) and TSCA certification for U.S
• EPA compliance, as dithionites are hazardous materials
• Ensure proper packaging labels for UN 1384 hazardous substance to prevent customs delays
Related Products under HTS 2831.10.50.00
Zinc Formaldehyde Sulfoxylate
A sulfoxylate derivative of sodium used as a reducing agent in printing and dyeing industries, classified under HTS 2831.10.5000 as 'other' sulfoxylates of sodium. Despite the zinc component, it meets chemically defined criteria per Chapter 28/29 notes when primarily sodium-based. It functions similarly to sodium dithionite in textile processing.
Sodium Hydrosulfite Powder 85%
Technical-grade sodium hydrosulfite at 85% assay, widely imported for pulp bleaching and as a mordant in leather processing. Classified in HTS 2831.10.5000 as other sodium dithionites, per Chapter 28 definitions for chemically pure inorganic sulfur compounds. It is highly reactive and requires inert atmosphere packaging.
Sodium Dithionite Flakes Industrial
Flaked form of sodium dithionite for easier handling in wastewater treatment and food processing decolorization. Falls under HTS 2831.10.5000 as unstabilized 'other' dithionites of sodium, chemically defined inorganic compound. Commonly used in environmental remediation.
Technical Sodium Sulfoxylate Dihydrate
Sodium sulfoxylate dihydrate (NaHSO2·2H2O) used in polymer synthesis and as a bleach in paper industry. HTS 2831.10.5000 covers this as 'other' sodium sulfoxylates, meeting inorganic compound purity notes. It decomposes to formaldehyde upon heating.
Sodium Dithionite for Dyeing 90% Min
High-purity sodium dithionite minimum 90% for indigo dyeing in denim production. Classified HTS 2831.10.5000 as other unstabilized sodium dithionites, essential reducing agent in textiles. Meets Chapter 28 chemical definition standards.