Chapter 39 covers plastics and articles thereof, including polymers in primary forms, synthetic rubber, semi-manufactures and waste and scrap. This chapter is subdivided by polymer type and processing stage; primary forms refer to liquid, paste, block, powder and other unshaped states. Heading 3908 specifically covers polyamides in primary forms, including polyamide-6, -11, -12, -6,6, -6,9, -6,10, -6,12, etc. These are synthetic polymers containing recurring amide groups, widely used in fibers, engineering plastics and other fields. The first 2 digits 39 represent Chapter 39, plastics and articles thereof. Digits 3-4, 08, represent heading 3908, namely polyamides in primary forms. Digits 5-6, 10, represent subheading 390810, specifically polyamide-6, -11, -12. Polyamide-6 is obtained by ring-opening polymerization of caprolactam, polyamide-11 by polymerization of undecanelactam, and polyamide-12 by polymerization of dodecanelactam. The goods are polyamide-6, -11 or -12 in primary forms, meeting the description of heading 3908, and are not mixed with other polyamides (such as polyamide-6,6), so they are classified under 390810. If they were polyamide-6,6, they would be classified under a subheading after 390810, such as 390810? In fact, 390810 only includes -6, -11, -12, and other polyamides come after 390810.

Product name: The specific name of the declared goods, such as polyamide-6 chips, polyamide-11 powder, etc., which must correspond to the HS code. Appearance: Describe the physical state of the primary form, such as chips, granules, powder, liquid, etc. Composition and content: State the type and content of polyamide, such as polyamide-6 content ≥99%, additives, etc. Type of monomer unit: Explain the monomer of the repeating unit, such as caprolactam, undecanelactam, etc. Grade: The grade provided by the manufacturer, such as BASF B3EG6, DuPont 101L, etc. Use: Main use, such as injection molding, spinning, film, etc. Brand: Brand of the goods, such as BASF, DuPont, EMS, etc. Model: Specific model, such as injection grade, extrusion grade, etc. Product name: polyamide-6 chips; Appearance: white granules; Composition and content: polyamide-6 99.5%, moisture 0.3%, additives 0.2%; Monomer unit: caprolactam; Grade: B3EG6; Use: injection molding of automotive parts; Brand: BASF; Model: injection grade. Mistakenly declaring polyamide-6,6 as 390810, when it should actually be classified under a subheading after 390810. Failing to distinguish primary forms from semi-manufactures; if already formed into rods, tubes, etc., they should be classified under other headings. Inaccurate declaration of composition and content; for example, reinforcing materials such as glass fiber may affect classification.

The core basis for classification is: 1) the goods are in primary forms; 2) the chemical structure is polyamide; 3) the specific type is polyamide-6, -11 or -12. It must be determined according to the Import and Export Tariff and its notes, in combination with composition, monomer units, etc. 390810 Polyamide-6, -11, -12: This code only includes polyamide-6, -11, -12, and does not include other polyamides such as -6,6. 39081010 Polyamide-6: If it is polyamide-6, it should be classified under 39081010, but 390810 is a 6-digit subheading and must be further subdivided according to national subheadings. 39081090 Other polyamides: Polyamide-6,6, -6,9, etc. are classified under 39081090, not 390810. 390890 Other polyamides in primary forms: If the polyamide does not meet the specific type of 390810, it is classified under 390890. Is it in primary form? Is it polyamide-6, -11 or -12? Does it contain other monomer units? Is it mixed with other substances? Has it been formed into semi-manufactures?

How can I check the import tariff rate for 390810? You can log on to the official website of the General Administration of Customs of China, enter the "Import and Export Tariff" section to check, or use a customs commodity code inquiry tool. Tariff rates may vary depending on trade agreements, origin, etc. It is recommended to consult a customs broker or customs. What is the difference in HS codes between polyamide-6 and polyamide-6,6? Polyamide-6 is classified under 39081010, while polyamide-6,6 is classified under 39081090 (other polyamides). The two have different chemical structures, with monomer units being caprolactam and hexamethylenediamine with adipic acid, respectively. What are the declaration elements for polyamides in primary forms? They mainly include product name, appearance, composition and content, type of monomer unit, grade, use, brand, model, etc. See customs declaration specifications for details. If polyamide-6 chips contain glass fiber, how should they be classified? If glass fiber is used as a reinforcing material and polyamide is the matrix, they may still be classified under 390810, but this must be judged according to content and processing state. If already made into semi-manufactures, they may be classified under other headings. Does 390810 include polyamide-12 powder? Yes, polyamide-12 powder belongs to primary forms and is classified under 390810. However, it must be ensured that it is not mixed with other substances or already formed. How is the tariff calculated for importing polyamide-6 chips from the United States? You need to check the most-favored-nation tariff rate or the China-US trade agreement rate. Usually a certificate of origin is required, and tariff = dutiable value × tariff rate. Please consult a customs broker for details. Are the HS codes for polyamide-6 and polyamide-11 the same? Yes, both are classified under 390810, but the specific type must be clearly declared so that customs can compile statistics and exercise supervision. If polyamide-6 has been dyed, does it affect classification? Usually it does not, as long as it is still in primary form and not mixed with other substances. However, if the dye changes the basic properties, reassessment is required.