Market evolution: Sodium dithionite (CN 2831) — 2015–2025

Introduction

This report examines the evolution of EU trade in dithionites and sulfoxylates (Customs code 2831) over the 2015–2025 period. CN 2831 encompasses two sub-categories: sodium dithionite and sulfoxylate (283110), which dominates trade volumes, and other dithionites and sulfoxylates (283190), which represents a much smaller but higher-value niche. The EU has historically been a major net exporter of these products, but the decade under review reveals a dramatic structural shift in the market. Overall, the EU's export volumes have collapsed, its trade surplus has narrowed sharply, and its role as a global supplier has diminished considerably. At the same time, unit prices have risen substantially, reflecting cost pressures and a possible repricing of the product in the wake of supply-side disruptions.

For more context on the product scope and definitions, see the Scope & Definitions section.

1. A dramatic contraction of EU exports reshapes the trade balance

1.1 Export volumes fell by two-thirds while values declined more moderately

The most striking feature of the 2015–2025 period is the collapse in EU export volumes. Total export quantity fell from 57,077 tonnes in 2015 to just 19,380 tonnes in 2025, a decline of 66.0%. Export value followed a less dramatic trajectory, declining from €72.2 million to €43.0 million (−40.4%), because the decline in volumes was partially offset by rising unit prices. Indeed, the average export price climbed from €1,265 per tonne to €2,218 per tonne over the period, an increase of 75.4%.

1.2 The sodium dithionite segment drives the export collapse

The breakdown by sub-product reveals that the contraction is overwhelmingly concentrated in sodium dithionite (283110). Export quantities of 283110 plunged from 57,013 tonnes to just 3,759 tonnes between 2015 and 2025 — a drop of 93.4%. The sharpest declines occurred after 2021, with volumes falling from 33,806 tonnes in 2021 to 22,661 tonnes in 2022, then to 18,031 tonnes in 2023, and collapsing further to 3,894 tonnes in 2024.

By contrast, 283190 (non-sodium dithionites and sulfoxylates) remained a marginal category throughout, with export volumes fluctuating between 25 and 146 tonnes, though at much higher unit prices (typically €4,000–7,500/t). This sub-product saw its own volume decline in 2024–2025 but its contribution to overall trade is small.

1.3 The trade surplus narrowed but the EU remained a net exporter

The EU's trade balance in dithionites and sulfoxylates contracted from €70.7 million in 2015 to €39.4 million in 2025 (−44.3%). Meanwhile, import values grew from €1.4 million to €3.6 million (+152.4%), though imports remained an order of magnitude smaller than exports. The net import reliance metric, which was −89.8% in 2015 (indicating a strong net-export position), moved to −10.5% by 2025. While still negative (i.e., the EU is still a net exporter), this represents an 88.3% shift toward balance, underscoring the erosion of the EU's traditional trade surplus.

For detailed trade flows and balances, see the General Overview dashboard.

2. Shifting geography of trade: diversifying imports and consolidating exports

2.1 Germany remained the dominant EU exporter, but its volumes halved

Among EU Member States, Germany was by far the largest exporter throughout the period, accounting for the majority of the bloc's outbound trade. However, Germany's export value fell from €66.1 million in 2015 to €35.8 million in 2025 (−45.8%), broadly in line with the overall EU decline. In 2025, Germany held an RCA (Revealed Comparative Advantage) of 2.03 in dithionites and sulfoxylates, indicating continued specialisation, and accounted for 42.9% of EU production.

Other notable EU exporters include Belgium (RCA of 6.37, the most specialised EU Member State), the Netherlands (which grew from €93,000 to €681,000 in exports, +632.3%), and Spain (which grew from €131,000 to €465,000, +254.1%). These smaller exporters partially offset the German decline, though their absolute volumes remain far smaller.

2.2 Traditional export destinations contracted sharply

The EU's main export destinations experienced significant declines over the period. Turkey, historically the single largest export market, saw its share fall from €11.7 million to €6.0 million (−48.7%). Pakistan (−65.6%), Brazil (−75.0%), and Bangladesh (−61.8%) all recorded steep declines, reflecting a broader pullback from developing-country markets.

Two important exceptions stand out: the United States grew from €5.5 million to €8.4 million (+54.1%), and the United Kingdom grew from €3.9 million to €4.6 million (+20.2%). These mature markets partially compensated for losses elsewhere but could not prevent the overall decline.

2.3 Import sources diversified with notable growth from India, China, and South Korea

On the import side, India remained the largest single source of dithionites and sulfoxylates flowing into the EU, with imports growing from €677,000 to €1.3 million (+94.9%). The most dramatic growth, however, came from:

• South Korea: imports surged from €101,000 to €458,000 (+353.9%)
• China: imports rose from €168,000 to €457,000 (+171.7%)
• United States: imports jumped from €52,000 to €1.05 million (+1,939.4%)

The concentration of EU imports (as measured by the Herfindahl-Hirschman Index by value) declined from 2,651 to 2,518 (−5.0%), indicating a modest diversification of supply sources. Nevertheless, an HHI above 2,500 still indicates a moderately concentrated import structure.

For the full country-level breakdown, see Partners and Reporters.

3. Structural transformation: declining production capacity, price shocks, and intensifying competition

3.1 EU production volumes contracted while production value held steady

EU domestic production of dithionites and sulfoxylates fell from 167,220 kg (2015) to 95,866 kg (2025), a decline of 42.7%. Yet production value remained essentially flat, rising marginally from €244.7 million to €255.2 million (+4.3%). This divergence points to a significant increase in production unit values, consistent with the higher input costs, energy prices, and tighter environmental regulations that have characterised the European chemical sector in recent years.

The production data also reveals the geographic concentration of EU capacity: in 2025, Germany accounted for 42.9% of EU production, and Belgium for 53.9% of the value share, underscoring the highly concentrated nature of the industry.

3.2 The 2022 energy crisis triggered a major price shock

The year 2022 stands out as a pivotal inflection point. EU export prices for sodium dithionite (283110) surged to €2,685/t in 2022, up from €1,594/t in 2021 — an increase of 68.5% in a single year. This coincided with the European energy crisis triggered by the Russia-Ukraine conflict, which dramatically raised the cost of chemical production in Europe.

Volatility analysis reveals that several key trade relationships experienced extreme price shocks in 2022:

The anomaly score of 499.0 for Vietnam is extraordinarily high, indicating an almost unprecedented price spike. Pakistan and Turkey also experienced sharp price increases, with abnormality scores of 47.8 and 36.8 respectively. These shocks suggest that EU exporters passed on elevated production costs to buyers, but the resulting price increases likely accelerated the loss of price-sensitive export markets.

3.3 Export concentration increased as the market narrowed

The EU's export concentration (HHI by value) rose from 708 to 939 (+32.6%) over the period. While an HHI below 1,000 still indicates a relatively unconcentrated market, the upward trend reflects the consolidation of export activity among fewer destinations — particularly the US and UK, which withstood the broader decline. The export propensity (share of production exported to non-EU countries) fell from 59.6% to 26.3% (−55.9%), signalling a fundamental shift in the EU's role: from a major global supplier to a more domestically oriented producer.

Trade intensity (the ratio of trade to total economic activity in this product) also declined from 64.0% to 36.9% (−42.4%), confirming that dithionites and sulfoxylates have become a less trade-oriented product for the EU over the past decade.

For detailed concentration and vulnerability metrics, see Concentration and Vulnerability dashboards.

Conclusion

The EU trade in dithionites and sulfoxylates (CN 2831) underwent a profound structural transformation between 2015 and 2025. Export volumes fell by two-thirds, led by a near-total collapse in sodium dithionite (283110) shipments to traditional developing-country markets such as Turkey, Pakistan, Brazil, and Bangladesh. While export prices rose by 75% — buoyed by the 2022 energy crisis — this was insufficient to compensate for the volume decline, and the EU's trade surplus shrank by 44%.

The underlying drivers appear to be a combination of: (1) a significant contraction in EU production capacity (−43% in volume terms), likely reflecting high energy costs and tighter environmental regulation; (2) increased competition from Asian producers, particularly India, China, and South Korea, which have grown their share of EU imports; and (3) a post-2022 repricing that further eroded the EU's competitiveness in price-sensitive markets. The EU's role has shifted from a dominant global exporter to a more specialised, higher-priced, and domestically oriented producer — a pattern consistent with broader trends in European basic chemical manufacturing.