Ministry of Commerce: Anti-dumping Duties on Imported Halogenated Butyl Rubber Originating from Japan and Canada to be Imposed Starting March 14

Ministry of Commerce Announcement No. 15 of 2026: Final Ruling on the Anti-Dumping Investigation of Imported Halogenated Butyl Rubber Originating from Japan, Canada, and India

According to the “Anti-Dumping Regulations of the People’s Republic of China” (hereinafter referred to as the “Anti-Dumping Regulations”), on September 14, 2024, the Ministry of Commerce (hereinafter referred to as the “investigation authority”) issued Announcement No. 38 of 2024, deciding to initiate an anti-dumping investigation on imported halogenated butyl rubber originating from Japan, Canada, and India (hereinafter referred to as the “investigated products”).

The investigation authority examined whether the investigated products were dumped and the dumping margins, whether the products caused damage to the domestic halogenated butyl rubber industry and the extent of such damage, and the causal relationship between dumping and damage. Based on the investigation results and Article 24 of the Anti-Dumping Regulations, on August 12, 2025, the investigation authority issued an preliminary ruling announcement, preliminarily finding that imports of halogenated butyl rubber from Japan and Canada were dumped, that the domestic industry suffered substantial damage, and that there was a causal relationship between dumping and damage; the anti-dumping investigation on imports from India was terminated.

Following the preliminary ruling, the investigation authority continued to investigate the dumping margins, damage extent, and the causal relationship. The investigation has now concluded. In accordance with Article 25 of the Anti-Dumping Regulations, the investigation authority has made a final ruling. The relevant matters are announced as follows:

1. Final Ruling

The investigation authority has finally determined that imports of halogenated butyl rubber originating from Japan and Canada are dumped, that the domestic industry has suffered substantial damage, and that there is a causal relationship between dumping and damage.

2. Imposition of Anti-Dumping Duties

According to Article 38 of the Anti-Dumping Regulations, the Ministry of Commerce has submitted a proposal to the Customs Tariff Commission of the State Council to impose anti-dumping duties. The Customs Tariff Commission has decided, effective from March 14, 2026, to impose anti-dumping duties on imports of halogenated butyl rubber originating from Japan and Canada.

The specific description of the investigated products is as follows:

• Scope of investigation: Imported halogenated butyl rubber originating from Japan and Canada.
• Name of investigated products: Halogenated butyl rubber (also known as chlorobutyl rubber or bromobutyl rubber in the “Import and Export Tariff of the People’s Republic of China”)
• English name: Halogenated Butyl Rubber (Chlorobutyl Rubber, Bromobutyl Rubber)
• Main molecular structure:

X is Br or Cl

• Physical and chemical properties: Halogenated butyl rubber is the product of the reaction between butyl rubber and halogenating agents, an improved version of ordinary butyl rubber. The halogenation includes chlorination and bromination, so halogenated butyl rubber can be divided into chlorobutyl rubber and bromobutyl rubber. The product appears as white to light amber rubber blocks. It features fast vulcanization, good compatibility with other unsaturated rubbers, high self-adhesion, and adhesion to other materials.

• Main uses: Mainly used in airtight layers without inner tubes, heat-resistant inner tubes, heat-resistant hoses and conveyor belts, pharmaceutical stoppers, shock absorbers, adhesives, and sealing materials.

This product is classified under the “Import and Export Tariff of the People’s Republic of China” codes: 40023910 and 40023990.

The anti-dumping duty rates for various companies are as follows:

Japan

1. Japan Butyl Co., Ltd. — 15.0%
2. Other Japanese companies — 30.1%

Canada

1. ARLANXEO Canada Inc. — 13.8%
2. Other Canadian companies — 13.8%

3. Method of Imposing Anti-Dumping Duties

Starting from March 14, 2026, importers shall pay the corresponding anti-dumping duties to the Customs of the People’s Republic of China when importing halogenated butyl rubber originating from Japan and Canada. The duties are levied based on the customs-assessed customs value, calculated as: Anti-dumping duty = Customs-assessed customs value × Anti-dumping duty rate. Value-added tax (VAT) at import shall be calculated on the customs value including tariffs and anti-dumping duties.

4. Retroactive Collection of Anti-Dumping Duties

For importers who, between August 14, 2025, and December 13, 2025 (inclusive), provided a security deposit to the Customs based on the preliminary ruling announcement, anti-dumping duties will be levied according to the scope and rates determined in the final ruling, and the deposit will be converted into anti-dumping duties. The VAT on the import link will be calculated accordingly. Any excess deposit beyond the final duties, as well as overpaid VAT, will be refunded by customs; underpaid amounts will not be collected. For importers who provided security deposits between December 14, 2025, and March 13, 2026 (inclusive), the deposits will be refunded.

Imports of halogenated butyl rubber originating from Japan and Canada before the implementation of temporary anti-dumping measures will not be subject to retroactive duties.

5. Duration of Anti-Dumping Duties

The anti-dumping duties shall be imposed for a period of five years starting from March 14, 2026.

6. Review of New Exporters

New exporters from Japan and Canada that did not export the investigated products to China during the investigation period may apply in writing for a review of their status as new exporters, in accordance with Article 47 of the Anti-Dumping Regulations.

7. Periodic Review

During the period of anti-dumping duties, interested parties may apply in writing for a review in accordance with Article 49 of the Anti-Dumping Regulations.

8. Administrative Reconsideration and Litigation

Objections to the final ruling and the anti-dumping duties may be filed through administrative reconsideration in accordance with Article 53 of the Anti-Dumping Regulations, or may be challenged in the people’s court.

This announcement takes effect from March 14, 2026.

Ministry of Commerce

March 13, 2026

(Source: Ministry of Commerce website)