What Technical Documents Should You Check When Importing Dyes and Pigments From China?
When importing dyes and pigments from China, confirm four types of documents: the technical data sheet, which tells you whether a grade will work; the certificate of analysis, which proves that a specific batch meets specification; the safety data sheet, which supports safe transport and safe handling in your plant; and the documents required for customs clearance and for the regulations of the target market. The product name, CAS number, batch number and codes must match across all of them.
A coatings and ink raw materials distributor in Southeast Asia ordered a full container of organic pigments and solvent dyes from China, planning to restock several long-standing customers ahead of the peak season. The supplier's invoice listed only trade names, and several products were declared under the same HS code. The safety data sheets that came with the goods were outdated English versions from several years earlier, with no CAS numbers in the composition section. The batch numbers on the certificates of analysis did not match the ones printed on the bags either. When the container reached port, local customs asked for additional composition information and a new review of the codes. The customs broker went back and forth with documents for several rounds, the container sat in port for several extra weeks, and demurrage charges piled up day after day. Several coatings plants could not wait for their pigments and bought from other distributors nearby, and one of them never came back. Every loss on that container came from a handful of documents nobody had checked.
What technical documents should you check when importing dyes and pigments from China? When importing dyes and pigments from China, confirm four types of documents: the technical data sheet, which tells you whether a grade will work; the certificate of analysis, which proves that a specific batch meets specification; the safety data sheet, which supports safe transport and safe handling in your plant; and the documents required for customs clearance and for the regulations of the target market. The product name, CAS number, batch number and codes must match across all of them.
A single shipment passes several checkpoints, and each one looks at documents. From the moment chemicals are loaded into a container at the port of Ningbo until they reach your warehouse, they go through export customs, the carrier's hazard review, customs and chemical regulators in the importing country, and finally incoming inspection by you and your customers. Each step checks different documents, and if any one of them is missing or contradicts another, the goods stop right there. We covered how to verify a supplier's ISO 9001 and ISO 14001 certificates in our previous article; this one covers the technical documents that each grade, each batch and each shipment needs. Checking them before the container is loaded costs far less than sorting them out once the goods are sitting in port.
Before you order: the technical data sheet and the standard sample decide whether a grade will work. Technical data sheet: the grade's identity and typical values. The technical data sheet (TDS) is the first document for judging whether a grade suits your system. A pigment TDS usually lists the Colour Index number (C.I. number), oil absorption, heat resistance, lightfastness and recommended systems; a dye shade card lists the Colour Index number, dyeing depth and each fastness rating, and every fastness rating should state its test method. When you receive it, check the grade name first, then see whether the key values meet the needs of your process and end use. Each of our organic pigment grades comes with a technical data sheet, our titanium dioxide data sheets state crystal form and surface treatment, and our plastic additives catalog lists the CAS number and suitable resins for every grade. Standard sample and equivalent grade: turning "same as the sample" into an agreement you can check. A technical data sheet gives typical values; for your specific order, you also need a standard sample sealed and kept by both parties. When the contract states which standard sample governs, which method is used to compare shade and tinting strength, and what tolerance is allowed, you have a reference to check against when the goods arrive. When you replace an existing product, also confirm which grade the new one is equivalent to: our coating additive, wax additive and biocide catalogs list equivalent products, and our phthalocyanine pigment catalog lists the corresponding grades from multinational producers, so you can check them one by one before ordering. Matching samples against your current standard is part of working with us from the first order.
Every batch: if the batch numbers do not match, incoming inspection has nothing to go on. A certificate of analysis (COA) corresponds to one specific batch number and lists the measured results for that batch, such as shade and tinting strength deviation against the standard sample, moisture, fineness or content. Check three things on a COA: the batch number matches the one on the packaging and the packing list; the tests cover the specifications agreed in the contract; and the measured values fall within the agreed ranges. When one shipment includes several batch numbers, each batch needs its own COA. Test against the COA on receipt and keep retained samples, so that if your customers later report a color or performance deviation, you have evidence to compare with your supplier.
Shipping: the safety data sheet decides whether the goods can go on board. Version, language and composition of the safety data sheet. The safety data sheet (SDS, also called MSDS) is written according to the Globally Harmonized System (GHS) in 16 sections, and the shipping line, the freight forwarder, customs and your own plant will all read it. When you check it, look first at the revision date and the regulatory version it follows, then at the composition and CAS numbers in Section 3, and confirm that they match the technical data sheet and the invoice. The outdated English SDS in the opening story was missing exactly that: the CAS numbers. Many importing countries require safety data sheets and package labels in the local language, written according to the GHS revision adopted in that country; the importer or a local agent usually adapts the supplier's English version on that basis. Dangerous and non-dangerous goods: each needs different certificates. Section 14 of the SDS gives the transport information. Products listed with a United Nations number (UN number) and a transport hazard class must be declared under the International Maritime Dangerous Goods Code (IMDG Code) for sea freight and shipped in approved dangerous goods packaging, and exports from China also require an inspection of the dangerous goods packaging in use. Most pigment and dye powders are non-dangerous goods, while some solvent-containing liquids and biocide concentrates may be classified as dangerous goods, so each grade has to be confirmed individually. For air freight of non-dangerous goods, forwarders usually ask for a cargo transport condition certificate. With these documents ready before booking, the goods will not be turned away at the terminal.
Customs clearance: agree on the code, product name and origin on the proforma invoice first. HS code: the first six digits are the same everywhere, and the importing country sets the rest. Customs uses the Harmonized System (HS) code to set the duty rate, the regulatory conditions and whether a license is required. Disperse dyes and preparations based on them fall under 3204.11, and synthetic organic pigments and preparations based on them fall under 3204.17. The first six digits are common to all countries, while the subdivisions after them are set by each importing country and must be confirmed by your customs broker. The shipment in the opening story declared different products under a single code, so it was bound to stop when customs checked it. Our practice is to ask you to send the grade and port of destination to the relevant division, which then states the code and packaging on the proforma invoice so your customs broker can confirm them before you pay. Product name, CAS number and certificate of origin: several documents have to say the same thing. The product name on the commercial invoice, packing list, SDS and COA must match, ideally showing both the trade name and the pigment or dye Colour Index number; when the importing country checks its chemical inventory, it goes by the CAS number. The certificate of origin proves that the goods were made in China. When the destination country has a free trade agreement with China, a preferential certificate of origin may give you a lower duty rate, and it has to be applied for before shipment. Because these documents come from different departments, we suggest sending the drafts together to your customs broker before the container is loaded, so any inconsistency can be corrected on the spot.
Regulatory documents for the target market take the longest to prepare. Before entering some markets, you need to confirm that the substances are listed in the local chemical inventory or have been registered, for example under REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) in the European Union and the Toxic Substances Control Act (TSCA) in the United States; this responsibility usually falls on the importer. When the product goes into toys, food contact materials or electrical and electronic equipment, you also need test reports or certificates for that use: our ultramarine blue range holds FDA, EU AP(89)-1 food contact, RoHS and EN71-3 certifications, and our pigments division sends the certificates that match the end use. Biocides must be confirmed as registered in the country of sale. These documents take the longest to obtain, so it is best to raise them at the inquiry stage.
Can I use the English SDS my supplier provides as it is? It depends on the rules of the destination country. Many markets require safety data sheets and labels in the local language, written according to the GHS revision adopted there, and the responsibility usually falls on the importer. The supplier's English SDS is the basis for that adaptation; before you order, ask your customs broker and the local authority which version you need. Each batch needs a new COA. Do I have to request the technical data sheet every time as well? There is one COA per batch number, and it must travel with the goods. The technical data sheet belongs to the grade, so as long as the grade and formulation do not change, you do not need to request it every time; when the supplier updates it, check whether the key values have changed and file the new version. If I find inconsistent documents only after the goods reach port, can it still be fixed? In most cases, yes: your customs broker can submit a corrected invoice or supplementary documents, at the cost of time, demurrage and inspection fees. The simplest approach is to check the drafts of the proforma invoice, packing list, SDS and COA together before the container is loaded.
Hongda Group has manufactured and exported chemicals in Ningbo since 1992, selling to more than thirty countries and working with more than five hundred distributors worldwide; documentation, logistics and compliance are part of our daily work. Each of our product lines has its own catalog, and samples and technical information come directly from the team that makes the product. Our organic pigments and titanium dioxide come with technical data sheets, safety data sheets can be requested grade by grade before you order, and HS codes and packaging are stated on the proforma invoice. If you are preparing to import dyes or pigments from China, tell us the grade, the application, the port of destination and the list of documents your customs broker requires, and we will go through them with you item by item before the container is loaded. To learn more about working with us, visit hongda-chem.com, click "Become a strategic partner" and contact us via WhatsApp or WeChat.