CHINA IECSC REGULATORY UPDATE
China's Ministry of Ecology and Environment (MEE) has officially added 486 substances to the Inventory of Existing Chemical Substances in China (IECSC) under Announcement No. 40 of 2026, dated August 4, 2026. The two annexes cover four substances supported by evidence of historical circulation in China and 482 previously registered new chemical substances. Once listed, a substance is generally managed as an existing chemical, but the update does not remove every regulatory condition: 192 of the 482 substances carry new-use environmental management scopes, and 57 are confidential entries.
Based on REACH24H's review of earlier public supplementation notices, this is the largest single IECSC addition to date. Manufacturers, importers and downstream users should now verify substance identity, inventory status and permitted use before changing registration projects or China market-entry plans.
Bottom line: IECSC listing can remove the need for new chemical registration based solely on inventory absence, but it does not create unrestricted use rights. The permitted-use scope must still be checked for entries subject to new-use environmental management.
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What Did MEE Add to the IECSC in 2026?
MEE's official announcement contains two annexes. Their regulatory basis and key characteristics are summarized below.
Source: MEE Announcement No. 40 of 2026 and its two annexes. Counts for confidential and new-use entries are compiled from Annex 2.
Following this update, REACH24H's inventory compilation indicates that the IECSC contains 47,577 entries, including 3,691 confidential entries and 369 entries subject to new-use environmental management.
What Changes When a Substance Is Added to IECSC?
Under MEE Order No. 12, a new chemical substance that has obtained regular registration is added to the IECSC after the applicable five-year period. Transitional arrangements also govern substances registered under the former MEP Order No. 7. The 482-substance annex reflects this inventory-inclusion mechanism, while the separate four-substance annex covers substances shown to have circulated in China before the historical cut-off date.
For most listed substances, inventory inclusion means they are managed as existing chemical substances rather than remaining subject to registration merely because they were absent from IECSC. This can affect open registration projects, testing plans, supplier declarations and launch schedules. Companies should nevertheless confirm that the listed identity matches their substance, especially where generic names, polymers, UVCBs or confidential entries are involved.
Where a substance remains unlisted, or a listed substance is proposed for a use outside an applicable permitted-use scope, companies may need a China new chemical substance registration and IECSC assessment before manufacture or import.
Why the 192 Substances Subject to New-Use Environmental Management Need Special Attention
Of the 482 registered substances added through Annex 2, 192 are marked as subject to new-use environmental management. These substances were classified on their registration certificates as priority hazardous new chemical substances under former MEP Order No. 7. MEE Announcement No. 46 of 2020 provides that such substances continue to be subject to new-use environmental management and that permitted uses are specified when they are added to IECSC.
Companies should therefore check the permitted use recorded in IECSC before relying on an inventory listing. For entries whose new-use environmental management scope covers all industrial uses, companies other than the holders of the relevant registration certificates should assess whether manufacture or import for the proposed industrial use requires registration under the applicable rules.
Confirm the exact IECSC name, generic name, CAS number or serial number that corresponds to the supplied substance.
Read the new-use environmental management scope and the stated permitted use together; do not rely on listing status alone.
Check whether the planned activity is production, import, processing and use, or another supply-chain activity relevant to the trigger.
Verify whether the party relying on the listing is the original certificate holder or another manufacturer, importer or user.
How Does the 2026 Revision Draft Affect the Analysis?
MEE's June 2026 revision of the new chemical substance registration measures is a consultation draft, not a final rule. Under the draft, an IECSC-listed substance subject to new-use environmental management would be treated as a new chemical substance when used outside its permitted use. The manufacturer or importer would need to obtain the applicable registration certificate under the draft framework before production or import. Unlike the current MEE Order No. 12, the draft does not establish a separate new-use environmental management registration route; it provides regular and simplified registration routes. These proposed changes remain subject to the final text and any implementing guidance.
What Should Chemical Companies Do Now?
Reconcile substance identities. Compare active and planned China substances against both official annexes using names, CAS numbers, generic identities and serial numbers. For confidential entries or uncertain matches, obtain a formal status confirmation before relying on the listing.
Map the actual use. For each of the 192 entries subject to new-use environmental management, compare the proposed industrial use with the permitted-use wording and determine whether registration may be required under the regulatory framework applicable at the time of the activity.
Review open registration work. Check substances currently under registration or notification, as well as existing receipts and certificates. Confirm the legal and procedural consequences before suspending, withdrawing or changing a project; an apparent match should not be treated as sufficient evidence on its own.
Update supply-chain controls. Align supplier declarations, internal inventory records, use descriptions and downstream communications with the revised IECSC status and any continuing environmental management conditions.
Monitor the rule revision. Track the final outcome of the MEE Order No. 12 revision and reassess the applicable registration pathway when the final measure and any implementation arrangements are published.
How REACH24H Can Support Your China Chemical Review
REACH24H supports overseas manufacturers, exporters, China importers and downstream users with substance identification, public and confidential IECSC status assessment, new-use applicability review, registration pathway analysis, dossier strategy and post-registration obligations under China's new chemical substance framework.
Need a targeted China REACH registration assessment?
If a China-bound substance appears in the new annexes, is confidential, or may be used outside the permitted scope, submit the substance identity, proposed use, annual volume and supply-chain role for a targeted China REACH registration assessment.
Recommended Reading
Official Sources
MEE Announcement No. 40 of 2026: Addition and Amendment of the IECSC (Chinese; includes both official annexes)
Measures for the Environmental Management Registration of New Chemical Substances (MEE Order No. 12) (Chinese)
MEE Announcement No. 46 of 2020 on Transitional Arrangements (Chinese)
2026 Revision Draft of the New Chemical Substance Registration Measures (Chinese; consultation draft)
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