Polyethyleneimine Price Trend and Forecast 2026-2027

Germany paid the most for polyethyleneimine in Q2 2026: USD 9.78/KG, up 4.3% from USD 9.38 in Q1. Polyethyleneimine, PEI, is polymerised from ethyleneimine, also known as aziridine, into either a branched or linear molecular structure depending on the polymerisation conditions, each suited to different applications given their distinct charge density and molecular architecture.

Water treatment, where its high positive charge density makes it an effective flocculant and coagulant aid for removing suspended solids, represents a significant and steady share of demand, alongside gene transfection reagents, paper strengthening additives, and adhesion promoters in coatings. Ethyleneimine itself is a hazardous, tightly regulated intermediate requiring specialised handling, which limits the number of producers capable of manufacturing PEI safely at scale and keeps this a more consolidated, higher-value market than many bulk specialty chemicals.

Germany and the United States host the most established PEI production capacity, reflecting decades of specialty chemical manufacturing infrastructure, while China's more recently built capacity has begun competing on cost for less demanding industrial-grade applications specifically. Branched PEI's compact, highly charged structure makes it the preferred choice for water treatment and gene transfection applications, while linear PEI's more regular structure suits certain coating and adhesion applications where branched material's structure would be less effective.

A buyer choosing between China and Germany in Q2 2026 faced a price gap of roughly 38%, the widest split among the regions in this report. Local production economics and import exposure explain most of that difference.

Polyethyleneimine Price Forecast for 2026

Expect steady gains across all four markets through H2 2026 as water treatment and specialty industrial demand continues its gradual growth. China should retain its cost advantage for industrial-grade material given its more recently built production capacity. Germany's premium should persist given its concentrated specialty chemical manufacturing base and established position in higher-purity grades. Growing water treatment demand in rapidly urbanising regions represents a structural, longer-term demand driver worth watching across all four markets.

H1 2026 closed with the 4 tracked markets averaging a 4.2% increase move quarter on quarter. That trajectory should hold into H2 unless one of the cost or demand drivers above shifts materially.

For the Quarter Ending June 2026

Polyethyleneimine Prices Q2 2026:

• United States: USD 9.05/KG
• Germany: USD 9.78/KG
• China: USD 7.10/KG
• Japan: USD 8.72/KG

Polyethyleneimine Prices in United States

United States's price gained 4.3% to USD 9.05/KG, firm water treatment demand kept US pricing climbing in step with the broader feedstock trend, putting it the 2nd most expensive of the 4 markets tracked this quarter.

Why did the price of Polyethyleneimine change in Q2 2026 in United States?

Firm water treatment demand kept US pricing climbing in step with the broader feedstock trend, with United States now sitting about 4.5% above the 4-region average this quarter.

United States has averaged 2.0% a quarter over the six quarters this report tracks; this move came in faster than that longer-run pace.

Polyethyleneimine Prices in Germany

In Q2 2026, Germany priced at USD 9.78/KG, up 4.3% from USD 9.38/KG the previous quarter, making it the priciest of the 4 markets tracked here this quarter.

Why did the price of Polyethyleneimine change in Q2 2026 in Germany?

Strong specialty chemical demand from the region's established manufacturing base kept Germany at the top of this group, which puts Germany roughly 12.9% above the average across the 4 regions this report tracks.

Set against a 2.0% average quarterly pace over the six quarters this report tracks, Germany's move this quarter landed faster than that trend.

Polyethyleneimine Prices in China

China reached USD 7.10/KG in Q2 2026, growing domestic industrial demand supported a firm quarter, ranking it the most affordable among the 4 markets this report follows.

Why did the price of Polyethyleneimine change in Q2 2026 in China?

Growing domestic industrial demand supported a firm quarter, even as China remained the most competitively priced of the four markets, working out to China trading about 18.0% below this quarter's 4-region average.

Measured against China's own average pace of 2.1% a quarter across the six quarters this report tracks, this move came in faster than that pace.

Polyethyleneimine Prices in Japan

Japan rose 4.1% to USD 8.72/KG in Q2 2026, steady water treatment and industrial demand supported a firm increase, placing it the 3rd most expensive across the 4 regions covered in this report.

Why did the price of Polyethyleneimine change in Q2 2026 in Japan?

Steady water treatment and industrial demand supported a firm increase, leaving Japan running roughly 0.7% above the 4-region average for the quarter.

That is faster than the 2.0% average quarterly move Japan has posted across the six quarters this report tracks.

For the Quarter Ending March 2026

Polyethyleneimine Prices Q1 2026:

• United States: USD 8.68/KG
• Germany: USD 9.38/KG
• China: USD 6.80/KG
• Japan: USD 8.38/KG

Polyethyleneimine Prices in United States

United States's price gained 1.4% to USD 8.68/KG, early-year water treatment sector restocking supported a firm start to 2026, putting it the 2nd most expensive of the 4 markets tracked this quarter.

Why did the price of Polyethyleneimine change in Q1 2026 in United States?

Early-year water treatment sector restocking supported a firm start to 2026, with United States now sitting about 4.5% above the 4-region average this quarter.

United States has averaged 2.0% a quarter over the six quarters this report tracks; this move came in slower than that longer-run pace.

Polyethyleneimine Prices in Germany

In Q1 2026, Germany priced at USD 9.38/KG, up 1.5% from USD 9.24/KG the previous quarter, making it the priciest of the 4 markets tracked here this quarter.

Why did the price of Polyethyleneimine change in Q1 2026 in Germany?

Consistent demand from the region's established specialty chemical industry carried prices higher, which puts Germany roughly 12.9% above the average across the 4 regions this report tracks.

Set against a 2.0% average quarterly pace over the six quarters this report tracks, Germany's move this quarter landed slower than that trend.

Polyethyleneimine Prices in China

China reached USD 6.80/KG in Q1 2026, growing domestic capacity utilisation supported a modest early-year gain, ranking it the most affordable among the 4 markets this report follows.

Why did the price of Polyethyleneimine change in Q1 2026 in China?

Growing domestic capacity utilisation supported a modest early-year gain, working out to China trading about 18.2% below this quarter's 4-region average.

Measured against China's own average pace of 2.1% a quarter across the six quarters this report tracks, this move came in slower than that pace.

Polyethyleneimine Prices in Japan

Japan rose 1.5% to USD 8.38/KG in Q1 2026, steady industrial demand carried prices higher as the new year began, placing it the 3rd most expensive across the 4 regions covered in this report.

Why did the price of Polyethyleneimine change in Q1 2026 in Japan?

Steady industrial demand carried prices higher as the new year began, leaving Japan running roughly 0.8% above the 4-region average for the quarter.

That is slower than the 2.0% average quarterly move Japan has posted across the six quarters this report tracks.

Quarterly Polyethyleneimine Price Trends

The global average climbed steadily across the window, from USD 7.84/KG in Q1 2025 to USD 8.66 by Q2 2026, a gain of 10.5% over six quarters.

What was Polyethyleneimine Price in 2025?

The global polyethyleneimine average moved steadily through 2025, opening near USD 7.84/KG in Q1 and closing the year at USD 8.19, a 4.5% increase.

Polyethyleneimine Prices in United States in 2025

United States prices moved from about USD 8.20/KG in Q1 2025 to USD 8.56 by Q4, up roughly 4.4%. That left United States ranked 2 of 4 tracked markets heading into 2026.

Polyethyleneimine Prices in Germany in 2025

Germany prices moved from about USD 8.85/KG in Q1 2025 to USD 9.24 by Q4, up roughly 4.5%, placing Germany 1 of 4 tracked markets as 2025 closed out.

Polyethyleneimine Prices in China in 2025

China prices moved from about USD 6.40/KG in Q1 2025 to USD 6.70 by Q4, up roughly 4.7%. China closed the year ranked 4 of the 4 markets this report tracks.

Polyethyleneimine Prices in Japan in 2025

Japan prices moved from about USD 7.90/KG in Q1 2025 to USD 8.26 by Q4, up roughly 4.5%, leaving Japan in 3 place among the 4 tracked markets heading into the new year.

How We Can Help

Expert Market Research: Your Source for Real-Time Polyethyleneimine Price Intelligence

Rather than reporting a single number in isolation, we follow polyethyleneimine pricing back to its roots: ethyleneimine (aziridine) costs, regional supply and demand balance, and the policy shifts that move both. That research gets updated on an ongoing basis across every region we cover.

Forecasts draw on production capacity data, feedstock cost trends, and demand signals from the regions we track, giving procurement and sourcing teams a grounded basis for budgeting and supplier negotiations rather than a single static number.

For a deeper regional cut, historical data beyond the six quarters covered here, or a sourcing analysis tailored to your own procurement footprint, get in touch with our analyst team directly.

We track branched and linear PEI pricing separately, since the choice between the two depends entirely on a buyer's specific application rather than price alone.