Duty Rate (from China)
Subheadings
Products classified under Tariff item 2831.90
Ammonium Dithionite Solution
> Ammonium dithionite in aqueous solution acts as a reducing bleach for textiles and paper. As a chemically defined inorganic compound of dithionite, it falls under tariff item 2831.90.00 for other dithionites and sulphoxylates. The aqueous solution is a normal method of putting up for safety and transport, consistent with Chapter 28 Note 1.
2831.90.00Potassium Dithionite
> Potassium dithionite is a strong reducing agent used in chemical synthesis and wastewater treatment. As a chemically defined inorganic salt of dithionite, it is classified under tariff item 2831.90.00 for other dithionites. It is not organically stabilized and meets Chapter 28 Note 1 criteria.
2831.90.00Sodium Dithionite
> Sodium dithionite, also known as sodium hydrosulfite, is a white crystalline powder used as a reducing agent in textile bleaching and vat dyeing. It is a chemically defined inorganic compound and falls under tariff item 2831.90.00 as 'other' dithionites, since it is not specifically named in the subheading.
2831.90.00Sodium Formaldehyde Sulfoxylate
> Sodium formaldehyde sulfoxylate is a sulfoxylate reducing agent used in polymerizations and dye discharge printing. It is a chemically defined inorganic compound, and as a sulfoxylate it falls under tariff item 2831.90.00 for other dithionites and sulphoxylates. The product is not organically stabilized in a way that excludes it from Chapter 28.
2831.90.00Zinc Dithionite
> Zinc dithionite is an inorganic salt used in industrial reducing applications, particularly in pulp and paper bleaching. As a chemically defined dithionite, it falls under tariff item 2831.90.00 for other dithionites. It meets Chapter 28 Note 1 requirements as a separate chemical compound.