How to Comply with New Chemical Substance Registration in China: 2026 Guide

How to Comply with New Chemical Substance Registration in China: 2026 Guide

China’s new chemical substance registration system — governed by the Provisions on the Environmental Administration of New Chemical Substances (Order No. 12, 2024 revision) — now processes over 3,500 registration applications annually from domestic and foreign manufacturers. Since the most significant regulatory overhaul in January 2025, the Ministry of Ecology and Environment (MEE) has streamlined the registration framework while simultaneously expanding the scope of regulated substances and increasing penalties for non-compliance. For foreign companies exporting chemicals or chemical-containing products to China, understanding the new chemical substance registration (NCSR) requirements is essential to avoid customs detention, product recalls, and fines that can reach RMB 500,000 per violation.

Understanding the Regulatory Framework: The New Chemical Substance Notification System

China’s chemical management system operates under a dual-track framework. The Inventory of Existing Chemical Substances in China (IECSC) lists approximately 50,000 substances that were already manufactured or imported in China before specific regulatory cutoff dates. Substances not listed on the IECSC are considered “new chemical substances” and require pre-market notification and registration under Order No. 12. The 2025 revision of Order No. 12 expanded the IECSC by approximately 3,000 substances (based on the 2024 supplementary notification cycle) and introduced a simplified notification pathway for low-concern polymers and naturally occurring substances.

The regulatory authority is the MEE’s Solid Waste and Chemicals Management Center, which administers the registration system through its Chemical Registration Center (CRC). Foreign companies must appoint a Chinese agent (a registered entity within China) to submit applications on their behalf, as the CRC does not accept direct applications from overseas entities. The Chinese agent bears joint legal responsibility for the accuracy and completeness of the registration dossier, making the selection of a qualified agent a critical compliance decision.

Step 1: Determine Whether Your Substance Requires Notification

The first compliance step is determining whether your substance is listed on the IECSC. The MEE maintains a searchable online database (accessible at crc.mee.gov.cn) where you can verify IECSC listing status by CAS number, Chinese chemical name, or structural identifier. If the substance is listed and your planned import volume does not exceed the quantity limits specified in the IECSC listing, no new chemical substance notification is required. However, if your substance is not on the IECSC, or if you plan to import quantities exceeding the IECSC-listed limits, a notification application is mandatory.

Foreign companies face several common pitfalls at this stage. The first is the polymer exemption trap: while certain low-concern polymers are exempt from full notification, the exemption criteria under Chinese law are narrower than under EU REACH or US TSCA. A substance classified as a “polymer of low concern” under REACH may not qualify for the same exemption in China. The second common pitfall is the impurity threshold: substances containing unlisted impurities at concentrations above 0.1% (or 0.01% for certain carcinogens, mutagens, and reproductive toxicants) may trigger a separate notification requirement for the impurity itself. Third, substance name discrepancies between your product documentation and the IECSC listing may cause customs to treat the substance as unlisted, even if it technically appears on the inventory with an alternate name or structural description.

Step 2: Prepare the Notification Dossier

Once you confirm that notification is required, the next step is compiling the technical dossier. The data requirements vary by notification type (see the table above), but all notification dossiers must include: a complete substance identification profile (CAS number, IUPAC name, molecular structure, spectral data), a physicochemical properties data package (melting point, boiling point, vapor pressure, water solubility, partition coefficient, flammability, explosivity), a toxicological data package (acute oral/dermal/inhalation toxicity, skin and eye irritation, skin sensitization, mutagenicity — Ames test), and an ecotoxicological data package (acute fish toxicity, acute daphnia toxicity, algal growth inhibition test, biodegradation screening test).

The MEE accepts data from non-Chinese testing laboratories if the laboratory operates under OECD Good Laboratory Practice (GLP) certification and the data is accompanied by a GLP compliance statement. However, the MEE retains the right to require additional testing in Chinese laboratories for substances with borderline data or novel structural characteristics. In practice, the CRC requests supplementary Chinese laboratory testing for approximately 15% of Level 2 and Level 3 notification applications. Planning for this possibility — by reserving 2–3 months of additional processing time and allocating a budget of RMB 50,000–200,000 for supplementary testing — can prevent costly project delays.

1. Identify the correct notification type based on substance characteristics, import volume, and hazard profile
2. Compile or commission the required data packages from OECD GLP-certified laboratories (allow 3–6 months for new testing)
3. Prepare the Chinese-language application dossier using the MEE’s standardized template (available at crc.mee.gov.cn/templates)
4. Appoint a qualified Chinese agent with technical expertise in chemical regulatory compliance
5. Submit the complete dossier through the CRC online portal (crc.mee.gov.cn/submission) along with the application fee

Step 3: Submit the Application and Navigate the Review Process

Applications are submitted through the CRC’s online system, with a non-refundable processing fee of RMB 5,000–20,000 depending on the notification type. The CRC review process involves three stages: administrative completeness review (5–10 working days — the CRC checks that all required documents are present and correctly formatted), technical evaluation (20–60 working days depending on notification level — the CRC’s scientific committee evaluates the data package for completeness, quality, and risk conclusions), and decision and certificate issuance (10–15 working days — the CRC issues the registration certificate or a notice of deficiency).

If the CRC identifies deficiencies in the application, they issue a “notice of supplementary materials” specifying exactly what additional data or documentation is required. The applicant has 90 days to respond to the deficiency notice; failure to respond within this period results in application abandonment, and the processing fee is forfeited. Approximately 40% of Level 2 and 55% of Level 3 applications receive at least one deficiency notice during review. Common deficiencies include: inadequate spectral characterization data, missing GLP compliance statements for certain test reports, insufficient environmental fate data for persistent substances, and incomplete translation of key study reports into Chinese.

Step 4: Post-Registration Compliance Obligations

Once the registration certificate is issued, the registrant (and its Chinese agent) must comply with ongoing obligations that extend throughout the validity period of the certificate. These obligations include: submitting annual reports on the actual quantity of the substance manufactured or imported (due by March 31 each year), notifying the CRC of any significant changes in substance composition, use patterns, or production volumes (within 30 days of the change), maintaining all supporting data and records for at least 10 years after the last import, and updating the safety data sheet (SDS) within the regulatory framework whenever new hazard information becomes available.

Failure to comply with post-registration obligations carries enforcement consequences. The MEE conducted 2,300 chemical compliance inspections in 2025, resulting in 187 enforcement actions against companies found to have inadequate post-registration records. Penalties ranged from RMB 20,000 fines for late annual report submissions to RMB 500,000 fines and registration certificate suspension for failure to report significant volume changes. Foreign companies should integrate these obligations into their corporate compliance calendar and designate a responsible person within their Chinese entity or agent organization.

• Recordkeeping: Maintain all raw test data, GLP study reports, correspondence with the CRC, and annual report submissions for a minimum of 10 years after the final import of the registered substance.
• Change notification: Notify the CRC within 30 days if the import quantity exceeds the registered level by more than 20%, if the substance composition changes, or if new hazard data becomes available that changes the risk classification.
• Downstream communication: Provide registered substance notification numbers to downstream customers who need to demonstrate compliance for their own product registration or customs clearance purposes.

Step 5: Manage Customs Clearance for Registered Chemical Substances

When importing a registered new chemical substance into China, the customs declaration must include the registration certificate number issued by the CRC. Customs will verify the registration number against the MEE database during clearance processing. If the substance is not registered or the declaration does not include the correct registration number, customs will detain the shipment and refer the matter to the MEE for enforcement action. The detention period can extend to 30–60 days while the MEE conducts a compliance investigation, during which the importer bears all storage and demurrage costs.

For substances exempt from registration (naturally occurring substances, certain polymers, substances below specific volume thresholds), the importer must maintain documentation supporting the exemption claim and present it to customs upon request. Common supporting documents include: material safety data sheets, technical data sheets establishing the substance identity and composition, import volume records demonstrating compliance with quantity thresholds, and expert opinions or third-party certifications confirming the exemption classification. The MEE recommends that importers obtain a formal exemption confirmation letter from the CRC for any substance whose exemption status is not obvious from the IECSC listing or regulatory text.

Where to Go From Here

China’s new chemical substance registration system remains one of the most technically demanding compliance obligations for chemical importers. A structured approach — starting with IECSC verification, proceeding through careful dossier preparation, and maintaining ongoing post-registration compliance — is essential for avoiding enforcement actions and supply chain disruptions.

• Ready to act? Read a step-by-step guide to completing the IECSC verification and notification process
• Still comparing? See a side-by-side comparison of notification types and data requirements
• Need numbers? Try an interactive cost calculator for NCSR registration fees and testing expenses

How to Comply with New Chemical Substance Registration in China: 2026 Guide — first published on China Gateway 360. Last updated: July 2026.