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SITCSection 5
U.S. imports of dithionites & sulfoxylates (SITC 52343) totaled $1.6M in April 2026, traded with 10 countries.
Importers of Dithionites & Sulfoxylates paid $245K in duties in April 2026 — an effective duty rate of 15% on $1.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Dithionites & Sulfoxylates imports of $1.6M in April 2026 ran 22% above the year-to-date monthly average of $1.3M.
Last updated: April 2026 dataSodium dithionite (also traded as sodium hydrosulfite) is the commercially dominant compound in this group, widely used as a reducing bleaching agent in textile dyeing, paper de-inking, and kaolin clay brightening. Its strong reducing power makes it effective for stripping vat dyes and for reducing indigo in denim production, but the same reactivity creates stability challenges — the product degrades rapidly in humid conditions, making moisture-controlled packaging and fast transit times critical supply-chain considerations. Sodium formaldehyde sulfoxylate (Rongalite) is the principal sulfoxylate in trade, used in discharge printing and as a reducing agent in emulsion polymerization.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Sodium dithionite oxidizes and decomposes rapidly when exposed to moisture or air, generating heat and sulfur dioxide gas — a process that can lead to spontaneous combustion in bulk shipments. DOT classifies it as a flammable solid, requiring hermetically sealed, moisture-barrier packaging and careful stowage away from heat sources. Importers should specify packaging standards in purchase contracts and verify compliance before loading.
Dithionites (e.g., sodium dithionite) are inorganic salts of dithionous acid used primarily for bulk bleaching and reduction in textiles and paper. Sulfoxylates (e.g., sodium formaldehyde sulfoxylate/Rongalite) are organosulfur compounds offering greater stability in alkaline conditions, making them preferred for discharge printing pastes and specialty polymer applications. While both are reducing agents, they are not interchangeable and serve distinct process chemistries.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $1.1M | -- | -$1.1M |
| INDIA | $251K | -- | -$251K |
| CANADA | $44K | $97K | +$53K |
| BELGIUM | $93K | -- | -$93K |
| KOREA, SOUTH | $84K | -- | -$84K |
Monthly import values over time
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