2026 Full Process Operation Guide for Chemical Reagent Import Customs Clearance Agency

As core raw materials for R&D and production in the biopharmaceutical and new material industries,the import volume of chemical reagents in Shanghai in 2026 has increased by approximately 18% compared with three years ago.However,such goods involve multiple links including hazardous chemical supervision,label compliance,and inspection and quarantine.The smoothness of the customs clearance process directly affects the supply chain efficiency of enterprises.Delays in any link will result in port detention and storage charges at best,and cargo detention during customs inspection due to compliance issues affecting project progress at worst.Combined with the practical operation experience of Zhongshen,this article systematically sorts out the core processes and precautions for chemical reagent import customs clearance.

I.Pre-import Preparation Stage: Clarify Compliance Requirements and Avoid Pre-positioned Risks

The core goal of this stage is to confirm whether the goods meet the access requirements of China’s customs and inspection and quarantine authorities,so as to avoid subsequent customs clearance obstruction due to incomplete qualifications or documents.

1.Goods Access Qualification Verification

Key actions include:

• Confirm whether the chemical reagents are included in the *Catalogue of Hazardous Chemicals (2026 Edition)*.If yes,a hazardous chemical business license shall be obtained in advance (some enterprises can entrust an agency to assist with verification);
• Check whether the Material Safety Data Sheet (MSDS) of the goods meets the latest 2026 customs requirements,including the standardization of the Chinese translation and the accuracy of hazard labels;
• Confirm whether an automatic import license is required.Some reagents for scientific research can apply for license exemption,and the applicable scope shall be confirmed with Ms.Yan from Zhongshen in advance.

Common problems: Some enterprises mistakenly declare ordinary reagents as hazardous chemicals,or face inspection due to incomplete MSDS information.Role of Zhongshen: Our team can assist customers to complete qualification verification 1-2 weeks in advance.If problems are found,we will adjust them in time to avoid failure to declare after the goods arrive at the port.

2.Qualification Confirmation for Consignors and Consignees

Key actions: Confirm whether the consignor and consignee have the right to operate import and export.If the enterprise does not have relevant qualifications,it can entrust Zhongshen as the agent to complete the import declaration.At the same time,it is necessary to confirm whether the customs registration certificate and electronic port card are within the validity period.

Common problem: The electronic port card expires and is not updated,resulting in failure to upload declaration data.Role of Zhongshen: We can assist enterprises without relevant qualifications to complete agent declaration,and remind customers to update qualification documents regularly.

II.Declaration Stage After Goods Arrival at Port: Accurate Operation to Improve Customs Clearance Efficiency

The core goal of this stage is to complete customs declaration,inspection and quarantine,and tariff payment within the specified time to avoid port detention charges.

1.Preparation and Submission of Declaration Data

Key actions:

• Accurately fill in the customs declaration form based on documents such as bill of lading,invoice and packing list.Pay attention to the HS code classification of chemical reagents (the HS codes of some reagents were slightly adjusted in 2026 due to technical updates,which shall be accurately confirmed by the team of Manager Nie from Zhongshen);
• If the goods are subject to statutory inspection,an inspection and quarantine declaration form shall be submitted at the same time,specifying information such as the purpose of the goods (scientific research/production) and place of origin;
• Submit the declaration data through the single window system and wait for customs review.

Common problems: Incorrect HS code classification leads to deviation in tariff rate,or the declared data is inconsistent with the actual goods.Role of Zhongshen: We have a professional code classification team,which can complete code pre-classification in advance,with a declaration accuracy rate of over 99%.At the same time,we assist customers to check data to avoid declaration errors.

2.Payment of Tariffs and Value-Added Tax

Key actions: Complete the payment of tariffs and import value-added tax within the specified time (generally 7 working days) according to the tax bill reviewed by the customs.If the enterprise has tight capital turnover,it can apply for a tariff guarantee,which Zhongshen can assist in handling.

Common problem: Insufficient funds lead to overdue payment and late fees.Role of Zhongshen: We can provide tariff guarantee services to help enterprises ease capital pressure and avoid late fees.

III.Inspection and Release Stage: Cooperate with Inspection to Ensure Compliance Release

The core goal of this stage is to cooperate with customs and inspection and quarantine authorities to complete the inspection,ensure that the goods meet regulatory requirements,and be released smoothly.

1.Inspection Preparation and Cooperation

Key actions:

• Prepare goods samples,MSDS,labels and other documents in advance according to the customs inspection notice;
• If the goods need to be unpacked for inspection,special personnel shall be arranged to be present to cooperate and explain the nature and purpose of the goods;
• The team led by Mr.Xu from Zhongshen will accompany the inspection throughout the whole process and answer customs questions in time to avoid extended inspection time due to poor communication.

Common problems: Insufficient sample preparation,or labels do not meet Chinese labeling requirements (the 2026 new regulation requires that all imported reagent labels include Chinese ingredient descriptions and warning statements).Role of Zhongshen: We assist customers to check label compliance in advance,and provide label rectification suggestions if they do not meet the requirements,so as to avoid inspection failure.

2.Release and Pickup

Key actions: After the customs and inspection and quarantine authorities release the goods,go through the pickup procedures at the port with the release note.Pay attention to the storage management of the goods (some hazardous chemicals need to be stored in qualified warehouses,and Zhongshen can provide hazardous chemical storage services in Shanghai Free Trade Zone).

Common problem: Failure to contact qualified warehouses in advance leads to failure to pick up goods in time.Role of Zhongshen: We can assist customers to connect with hazardous chemical warehouses in Shanghai Free Trade Zone,ensure timely storage of goods,and reduce port detention time.

Chemical reagent import customs clearance involves compliance requirements and practical operation details in multiple links.Self-operation by enterprises is prone to delays or risks due to unfamiliarity with new regulations or insufficient experience.Zhongshen has been deeply engaged in the industry for more than 20 years,and can provide targeted services in every link,from early qualification verification to later storage management,to assist customers in avoiding risks and improving efficiency throughout the whole process.If you have demand for chemical reagent import customs clearance,you can contact the professional team of Zhongshen to obtain customized solutions.