EconToMarks Deep Dive · 10 August 2026
EU imposes anti-dumping duties of up to 24.1% on terephthalic acid imports
On 10 August 2026 the European Commission confirmed definitive anti-dumping duties on EU imports of terephthalic acid from South Korea and Mexico. Duties on Korean imports range from 6.1% to 13.3%, while Mexican imports face a 24.1% duty. The case is a strong protectionism example because it shows a targeted tariff-style measure intended to defend EU producers from dumped imports while creating potential costs for downstream users.
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What happened
The European Commission imposed definitive anti-dumping duties after an investigation concluded that terephthalic acid from South Korea and Mexico had been entering the EU at dumped prices and causing injury to EU producers. The Commission set duties of 6.1% to 13.3% on Korean imports and 24.1% on Mexican imports. The EU market is worth about €1.4 billion and the domestic industry directly employs around 600 people in Belgium, Poland and Spain.
Why it matters
Anti-dumping duties are a form of protectionism designed to raise the price of selected imports when authorities conclude that foreign producers are selling below a fair benchmark and injuring domestic industry. For students, the case is useful because the policy has a clear benefit-cost trade-off: EU producers may gain market share and preserve employment, while manufacturers using terephthalic acid to make PET packaging, bottles and fabrics may face higher input costs.
Relevant theory
Connect the event to the syllabus.
Key evidence
Korean duties
Definitive anti-dumping duties on imports from South Korea range from 6.1% to 13.3%.
Mexican duty
Imports of terephthalic acid from Mexico are subject to a 24.1% definitive anti-dumping duty.
EU market size
The European Commission values the EU terephthalic-acid market at about €1.4 billion.
EU producer employment
The EU industry directly employs around 600 people in Belgium, Poland and Spain.
Best diagram
Tariff diagram showing the world price plus an import duty raising the domestic price, reducing imports and expanding domestic supply
- 1Draw the domestic demand and supply curves for terephthalic acid and mark the world price below the domestic equilibrium price.
- 2Add the anti-dumping duty so the effective import price rises above the original world price.
- 3Show domestic supply expanding and domestic demand contracting at the higher price, so the volume of imports falls.
- 4Identify the gains to domestic producers and government tariff revenue, alongside the loss of consumer surplus for downstream buyers.
- 5Use the diagram only as a framework: the actual welfare effect also depends on whether the original import price reflected injurious dumping and on the availability of alternative suppliers.
Chain of analysis
Step 1
South Korean and Mexican terephthalic acid was found by the Commission to be entering the EU at dumped prices and injuring EU producers.
Step 2
The EU imposed definitive anti-dumping duties, increasing the landed price of the affected imports.
Step 3
A higher import price makes EU-produced terephthalic acid relatively more competitive, so domestic producers may increase sales and output.
Step 4
Import demand from the affected sources should fall, with some demand potentially switching to EU firms or alternative foreign suppliers.
Step 5
However, terephthalic acid is an input into PET bottles, packaging and fabrics, so higher input prices can raise costs for downstream firms and potentially final consumers.
Step 6
The final welfare effect depends on the scale and persistence of dumping, the responsiveness of buyers and suppliers, and whether temporary protection improves fair competition or instead reduces efficiency and competitive pressure.
Counter-case
When might the main chain weaken?
Use these conditions to challenge the initial mechanism rather than assuming the effect is automatic.
Targeted protection is different from a blanket tariff
The duties apply to a specific product and named origins after an anti-dumping investigation. That strengthens the case that the measure is aimed at a defined trade distortion rather than simply shielding all domestic production from competition.
Downstream firms may lose
Terephthalic acid is used to make PET bottles, food packaging and fabrics. If the duties raise EU input prices, firms further down the supply chain may face higher costs, offsetting some of the producer benefit.
Substitution can limit the effect
EU buyers may switch to domestic suppliers or imports from countries not covered by the duties. The effect on prices, import volumes and domestic output therefore depends on elasticities and alternative sources of supply.
Long-run efficiency is uncertain
Protection may preserve viable production when dumping distorts competition, but prolonged protection can weaken incentives to reduce costs or innovate. The strongest judgement depends on whether the measure restores competition or shelters inefficiency.
Judgement
Anti-dumping duties can protect domestic producers from unfairly low-priced imports, but they can also raise costs for firms using the protected product as an input. The net effect depends on demand and supply elasticities, alternative suppliers, the persistence of dumping and whether protection weakens competitive pressure over time.
Use it in a 12-marker
Use one or two precise pieces of evidence, build a clear causal chain from the case, then test the size or certainty of the effect with one focused condition.
Use it in a 15-marker
Use one or two pieces of the key evidence, explain the mechanism clearly, and use the diagram to anchor the causal chain. Keep evaluation focused on the condition in the judgement rather than adding unrelated points.
Use it in a 25-marker
Use the 24.1% Mexican duty and the 6.1%-13.3% Korean range as precise application. Explain the tariff mechanism, then separate the gains to protected EU producers from the higher input costs faced by downstream users. A strong judgement should distinguish targeted anti-dumping action from broad protectionism and depend on the evidence of dumping, the availability of alternative suppliers and the long-run effect on competition.
Practice question
Evaluate the likely effects of protectionist measures on consumers, producers and economic welfare.
Sources and update note
Policy facts are taken from the European Commission's 10 August 2026 trade-defence announcement and Commission Implementing Regulation (EU) 2026/1904. The welfare, elasticity and efficiency effects are economic analysis rather than guaranteed outcomes.