Full Process Breakdown of Chemical Import Customs Declaration: Key Steps from Document Preparation to Port Release

From BASF’s basic polymers in Germany,to functional fine chemicals in Japan,and then to special coating raw materials in the United States,chemical products constitute the indispensable "blood" of modern manufacturing.Entering 2026,China’s demand for high-performance and special chemical materials continues to grow,but the import channel is not smooth.Fluctuations in global raw material prices,deepening regionalized supply chain layout,combined with the continuous tightening of domestic safety production and environmental protection regulations,make chemical imports a highly professional systematic project.Enterprises often feel overwhelmed when dealing with this alone.

A composite material factory in East China once ordered a batch of epoxy resin curing agents from the EU.After the goods arrived at the port,the provided Material Safety Data Sheet (MSDS) was outdated,and one of the corrosion inhibitor ingredients was not listed,so the customs determined it as "unknown ingredients" and required full ingredient identification in the laboratory.The entire process took nearly a month,generating tens of thousands of yuan in container detention fees and testing fees,and the production line once faced the risk of supply interruption.Such incidents are not isolated,highlighting the practical difficulties caused by information asymmetry and professional barriers in chemical imports.

Core Challenges and Agency Value of Chemical Imports

Chemical products have a wide range of categories and various forms,and their import difficulties are concentrated in several aspects.First is classification and identification.Products with the same chemical name may have completely different Customs Codes (HS Codes) due to differences in purity,form and packaging methods,which are directly related to tariff rates and regulatory requirements.Second is compliance documents.The MSDS must comply with China’s GB/T 16483 standard,and truly and completely reflect the product ingredients,physical and chemical properties and hazard categories.Many foreign suppliers provide documents with inconsistent formats and missing information,which lays hidden dangers for customs clearance.Third is inspection and licensing.Some chemical products are involved in the "List of Dangerous Chemicals",and need to go through the "Compliance Statement for Imported Dangerous Chemicals Business Enterprises" and the "Report on Classification and Identification of Dangerous Goods Characteristics"; for products involving food contact materials,pesticide intermediates,etc.there are more strict access approvals.

The role of Zhongshen in chemical import agency is based on the systematic decomposition and contingency plan preparation for the above-mentioned difficulties.The agency service is not just simple document delivery,but intervenes before the signing of the trade contract to conduct pre-compliance review,and acts as a professional "translator" and "navigator" throughout the entire customs declaration and inspection process,transforming complex regulatory provisions into executable operating instructions to ensure that goods pass customs compliance and efficiently.

Phased Process Breakdown and Zhongshen’s Response Strategies

Phase 1: Pre-import Preparation and Compliance Screening

Preparation starts before and after the order is confirmed.Manager Wen emphasized that this step is the cornerstone of avoiding subsequent risks.

• In-depth Product Information Review: We will require customers to provide as detailed product information as possible,including precise chemical names,CAS numbers,ingredient proportions,and packaging specifications (such as 200-liter iron drums,1-ton IBC ton drums).The core work is to review and standardize the MSDS.Our customs team will check whether its 16 items are complete against China’s current standards,especially Section 2 (Hazard Summary),Section 3 (Ingredient/Composition Information),Section 9 (Physical and Chemical Properties) and Section 14 (Transport Information).For documents with non-compliant formats or ambiguous information,we will guide customers to communicate with suppliers to obtain versions that meet the requirements.
• Regulatory Condition Prediction: Based on the product information,we will initially determine the regulatory documents it may involve,such as "Import License for Dual-use Items and Technologies","Pesticide Registration Certificate","Notice of Environmental Management Release of Toxic Chemicals",etc.At the same time,we will check whether the product is in the "List of Strictly Restricted Toxic Chemicals in China" or the access negative list of related industries.At the end of 2025,the Ministry of Ecology and Environment updated a batch of priority controlled chemical lists,and the relevant import requirements officially took effect in 2026.Our database will synchronize these updates.
• Case: Last year,a customer planned to import a batch of organic solvents for semiconductor cleaning from South Korea.The information provided by the supplier indicated that it was a "mixture" and the ingredients were not fully disclosed.Based on industry experience,we judged that the product may contain controlled substances.After in-depth communication with the customer and supplier,we finally obtained the confidential ingredient statement and corresponding legal use certificate,and completed the "dual-use items" license in advance,avoiding the risk of return due to incomplete documents after the goods arrived at the port.

Phase 2: Document Pre-review,Classification and Declaration Preparation

After the goods are shipped,enter the stage of document collection and pre-review.The goal of this stage is to ensure that all declaration materials are logically consistent and comply with regulations.

• Accurate Classification: The classification of chemical products is a technical task.For example,ethyl acetate with a purity of more than 99% and that with a purity of 90% may have different HS codes and regulatory conditions.We rely on senior classifiers to conduct accurate classification by combining the "Comments on Import and Export Tariff Goods and Items" and previous classification ruling cases.The classification result directly determines the tariff cost and whether inspection is required (for example,if the regulatory condition is "A",an entry goods clearance certificate is required).
• Document System Construction: In addition to basic documents such as invoices,contracts,packing lists and bills of lading,chemical products need to focus on preparing: standardized Chinese MSDS,dangerous goods characteristics classification and identification report (if applicable),compliance statements,certificates of origin,etc.We will make a clear document list and timetable to remind customers to implement them one by one.For dangerous goods,we also need to check whether the packaging performance inspection result form and dangerous goods transport labels are pasted in compliance with regulations.

Phase 3: Port Declaration,Inspection and Cooperation with Inspection and Quarantine

After the goods arrive at the port and electronic declaration is made,the system may issue an inspection order.The inspection rate for chemical products,especially suspected dangerous goods or products imported for the first time,is relatively high.

• Responding to Customs Inspection: As soon as we receive the inspection notice,we will notify the customer immediately and arrange professionals familiar with this shipment to accompany the inspection.On-site,we will clearly explain the product’s use and ingredients to customs officers and provide corresponding documents.For cases requiring container opening inspection,we will take safety protection measures.Once,a customer’s imported "plastic plasticizer" was selected for inspection,and the customs officer had doubts about its viscous liquid state.The accompanying Ms.Pu immediately presented the complete non-dangerous identification report and MSDS,and explained its industrial use,and the inspection passed smoothly,avoiding the long wait for sampling and inspection.
• Inspection and Quarantine Process: For legal inspection goods (regulatory conditions include "A"),it is necessary to declare to the port customs and accept inspection and quarantine.The process includes declaration,on-site inspection (checking goods and documents,inspecting packaging,sensory inspection),and sampling for laboratory testing (testing harmful substances,ingredient content,etc.) when necessary.We will prepare relevant standards and technical materials in advance to cooperate with quarantine personnel.Only after the test is qualified can we obtain the "Certificate of Inspection and Quarantine for Entry Goods",and the goods can be sold and used.

Phase 4: Subsequent Supervision and Connection with Export Tax Rebates

The release of goods from the port is not the end of the service.For chemical raw materials imported by processing trade enterprises,they need to be included in the customs bonded supervision account management.As an agent,we will assist enterprises to complete standardized warehouse entry records,laying a foundation for subsequent processing and export verification.For enterprises that process finished products for export after general trade import,the compliant VAT invoices obtained in the import link are important vouchers for handling export tax rebates.We ensure that the documents of the entire import process are legal and complete,paving the way for subsequent tax rebate applications and forming a complete foreign trade closed loop.

Summary: Certainty Brought by Professional Agency

Chemical imports have long chains,many links and detailed rules.If enterprises operate on their own,they often need to configure a composite team familiar with customs,inspection and quarantine,chemicals,logistics and taxation,with high costs and low fault tolerance.Entrusting professional matters to an agency company like Zhongshen essentially transforms uncontrollable compliance risks into manageable service processes.The value is not only reflected in the improvement of customs clearance speed for one time,but more importantly,through systematic pre-review and process control,it fundamentally eliminates major delays and losses caused by document,classification and quarantine issues,ensuring the stability of the enterprise’s supply chain and the predictability of costs.In 2026,with the continuous iteration of regulatory requirements,this certainty brought by professional division of labor is becoming increasingly important for enterprises.