South Korea has added xylene, styrene, and 1,3-butadiene to its list of accident-preparedness substances, effective March 10, 2026. Importers and distributors of these high-volume industrial chemicals must now comply with stricter pre-import reporting and contingency planning obligations under the Chemicals Control Act (K-CCA), affecting supply-chain logistics and compliance costs for overseas suppliers.
Regulatory update
On March 10, 2026, Korea's National Institute of Chemical Safety (NICS) issued Announcement No. 2026-2, approving a revised draft of the Designation of Accident-Preparedness Substances. The revision adds three substances—xylene (CAS 1330-20-7, 95-47-6, 106-42-3, 108-38-3), styrene (CAS 100-42-5), and 1,3-butadiene (CAS 106-99-0)—to the list. These chemicals are classified as having high acute toxicity or strong explosiveness, posing serious accident risks.
Compliance obligations for importers
Companies that began manufacturing or importing these substances before September 26, 2025, and had already submitted chemical confirmations under Article 9 of the K-CCA, are deemed to have fulfilled the corresponding accident-preparedness substance obligations after that date. However, any company starting production or import after September 26, 2025, must submit a Letter of Confirmation (LOC) before commencing activities. Self-checks on product composition are required.
What buyers should watch
Overseas suppliers of xylene, styrene, and 1,3-butadiene to South Korea should verify whether their customers have completed the LOC process. Delays in compliance could disrupt shipments or lead to penalties. The regulation will be reviewed every three years, so buyers should monitor NICS announcements for potential expansions of the list or changes to reporting requirements.
China sourcing context
China is a major producer and exporter of xylene, styrene, and 1,3-butadiene to South Korea. Chinese manufacturers and trading companies should ensure their South Korean partners are aware of the new designation and have submitted the necessary confirmations. Failure to comply may result in customs holds or rejection of cargo at Korean ports.
Source: Read the original report | Published: March 17, 2026