Chapter 39 covers plastics and articles thereof, including polymers in primary forms, synthetic resins, plastic materials, etc. This chapter is divided into two main parts: plastics in primary forms (headings 39.01 to 39.14) and waste, parings, and scrap; semi-manufactures; and articles (headings 39.15 to 39.26). Primary forms refer to liquids, pastes, powders, granules, flakes, etc., excluding molded or semi-finished plastic products. Amino resins, as a type of thermosetting resin, fall within the scope of synthetic resins and are therefore classified in this chapter. Heading 39.09 covers amino resins in primary forms, including urea resins, melamine resins, thiourea resins, etc. These resins are produced by the polycondensation of amino compounds (such as urea, melamine) with aldehydes (such as formaldehyde), and are typically colorless or light-colored solids, solutions, or dispersions. This heading also includes unmodified amino resins and copolymers with other resins, provided they meet the conditions for primary forms. Code 390930 is a six-digit subheading: the first two digits '39' represent Chapter 39 (plastics and articles thereof); the third and fourth digits '09' represent heading 39.09 (amino resins in primary forms); the fifth and sixth digits '30' represent subheading 3909.30, specifically referring to other amino resins other than urea resins (3909.10) and melamine resins (3909.20). Therefore, 390930 covers other amino resins, such as thiourea resins, aniline-formaldehyde resins, etc. This product is an amino resin in primary form, not mixed or modified with other materials, and is not a urea or melamine resin, so it is classified under 3909.30. If it were urea resin, it should be classified under 3909.10; melamine resin under 3909.20; if it has been made into semi-finished products such as sheets, plates, films, etc., it should be classified under 39.20 or 39.21; if it is waste and scrap, it should be classified under 39.15.
Chapter
Chapter 39 covers plastics and articles thereof, including polymers in primary forms, synthetic resins, plastic materials, etc. This chapter is divided into two main parts: plastics in primary forms (headings 39.01 to 39.14) and waste, parings, and scrap; semi-manufactures; and articles (headings 39.15 to 39.26). Primary forms refer to liquids, pastes, powders, granules, flakes, etc., excluding molded or semi-finished plastic products. Amino resins, as a type of thermosetting resin, fall within the scope of synthetic resins and are therefore classified in this chapter.
Heading
Heading 39.09 covers amino resins in primary forms, including urea resins, melamine resins, thiourea resins, etc. These resins are produced by the polycondensation of amino compounds (such as urea, melamine) with aldehydes (such as formaldehyde), and are typically colorless or light-colored solids, solutions, or dispersions. This heading also includes unmodified amino resins and copolymers with other resins, provided they meet the conditions for primary forms.
Digit Breakdown
Code 390930 is a six-digit subheading: the first two digits '39' represent Chapter 39 (plastics and articles thereof); the third and fourth digits '09' represent heading 39.09 (amino resins in primary forms); the fifth and sixth digits '30' represent subheading 3909.30, specifically referring to other amino resins other than urea resins (3909.10) and melamine resins (3909.20). Therefore, 390930 covers other amino resins, such as thiourea resins, aniline-formaldehyde resins, etc.
Classification Basis
This product is an amino resin in primary form, not mixed or modified with other materials, and is not a urea or melamine resin, so it is classified under 3909.30. If it were urea resin, it should be classified under 3909.10; melamine resin under 3909.20; if it has been made into semi-finished products such as sheets, plates, films, etc., it should be classified under 39.20 or 39.21; if it is waste and scrap, it should be classified under 39.15.
📝 Declaration Elements
Product Name: The specific name of the declared commodity, such as 'amino resin' or specific type (e.g., thiourea resin). It should accurately reflect the chemical composition of the commodity. Appearance: Describe the physical form of the commodity, such as liquid, powder, granules, lumps, etc., which must meet the definition of primary forms. Composition and Content: Indicate the main components and their percentage content, such as amino resin content, solvents, additives, etc. Use: Explain the final use of the commodity, such as for coatings, adhesives, molding compounds, etc. Brand: The brand name of the manufacturer or trader; if no brand, declare 'no brand'. Model: Product model or specification, such as A-100, which helps distinguish resins with different properties. Packaging Specifications: Packaging form and net weight, such as 25kg/bag, 200kg/drum, etc. Modified or Not: Indicate whether it has been chemically modified or blended with other resins, which affects classification. Product Name: Amino resin (thiourea resin); Appearance: White powder; Composition and Content: Thiourea-formaldehyde resin 95%, moisture 5%; Use: For preparing adhesives; Brand: No brand; Model: ST-200; Packaging Specifications: 25kg/bag; Modified or Not: Unmodified. Misclassifying melamine-formaldehyde resin under 390930, when it should be under 390920. Classifying amino resin that has been made into sheets under 390930, when it should be under 3920. Failure to declare modification information, leading to subheading classification errors. Appearance described as 'lump' but actually in primary form, requiring detailed explanation.
Product Name
The specific name of the declared commodity, such as 'amino resin' or specific type (e.g., thiourea resin). It should accurately reflect the chemical composition of the commodity.
⚠️ Incorrectly declaring as 'urea resin' or 'melamine resin', leading to classification errors.
Appearance
Describe the physical form of the commodity, such as liquid, powder, granules, lumps, etc., which must meet the definition of primary forms.
⚠️ Declaring solidified lump resin as primary form, when it should actually be classified as articles.
Composition and Content
Indicate the main components and their percentage content, such as amino resin content, solvents, additives, etc.
⚠️ Only writing 'amino resin 100%', without specifying the specific type or whether modifiers are included.
Use
Explain the final use of the commodity, such as for coatings, adhesives, molding compounds, etc.
⚠️ Use description is too broad, such as 'industrial use', lacking specificity.
Brand
The brand name of the manufacturer or trader; if no brand, declare 'no brand'.
⚠️ Confusing trademark with brand, or omitting the brand.
Model
Product model or specification, such as A-100, which helps distinguish resins with different properties.
⚠️ Model is incomplete or inconsistent with the actual product.
Packaging Specifications
Packaging form and net weight, such as 25kg/bag, 200kg/drum, etc.
⚠️ Net weight not indicated, only writing 'bagged'.
Modified or Not
Indicate whether it has been chemically modified or blended with other resins, which affects classification.
⚠️ Modified resin not declared, leading to subheading errors.
Example： Product Name: Amino resin (thiourea resin); Appearance: White powder; Composition and Content: Thiourea-formaldehyde resin 95%, moisture 5%; Use: For preparing adhesives; Brand: No brand; Model: ST-200; Packaging Specifications: 25kg/bag; Modified or Not: Unmodified.
Common Mistakes：
Misclassifying melamine-formaldehyde resin under 390930, when it should be under 390920.
Classifying amino resin that has been made into sheets under 390930, when it should be under 3920.
Failure to declare modification information, leading to subheading classification errors.
Appearance described as 'lump' but actually in primary form, requiring detailed explanation.
🎯 Classification Logic
The core basis for classification is the notes to Chapter 39 and subheading notes of the Import and Export Tariff. Amino resins are synthetic resins; the definition of primary forms is given in Chapter Note 6: liquids, pastes, powders, granules, flakes, etc. Heading 3909 explicitly includes amino resins, and subheading 3909.30 covers other amino resins. It is necessary to confirm the chemical composition, form, and whether modified. If it is urea or melamine-formaldehyde resin, it is classified under the first two subheadings. 390910 Urea resin: Urea resin is a polycondensate of urea and formaldehyde, while 390930 is other amino resins, such as thiourea resin. The difference lies in the type of amino compound. 390920 Melamine resin: Melamine resin is a polycondensate of melamine and formaldehyde, while 390930 is other amino resins. The key difference is whether the raw material is melamine. 390940 Phenolic resin: Phenolic resin is a polycondensate of phenols and aldehydes, belonging to phenolic resins, while amino resins are polycondensates of amino compounds and aldehydes. The chemical structures are different. 390799 Other polyesters: Polyester resins are polycondensates of polyacids and polyols, different from the amino-aldehyde polycondensation mechanism of amino resins. Classification should be distinguished based on chemical composition. 392190 Other plastic sheets, plates, films: If amino resin has been made into semi-finished products such as sheets, plates, films, etc., it should be classified under 3921, not under 3909 as primary forms. Is it in primary form (liquid, powder, granules, etc.)? Is it produced by polycondensation of amino compounds with aldehydes? Is it not urea or melamine-formaldehyde resin? Is it not mixed or modified with other materials? Is it not made into semi-finished products or articles?
Basis
The core basis for classification is the notes to Chapter 39 and subheading notes of the Import and Export Tariff. Amino resins are synthetic resins; the definition of primary forms is given in Chapter Note 6: liquids, pastes, powders, granules, flakes, etc. Heading 3909 explicitly includes amino resins, and subheading 3909.30 covers other amino resins. It is necessary to confirm the chemical composition, form, and whether modified. If it is urea or melamine-formaldehyde resin, it is classified under the first two subheadings.
Confused Codes：
390910 - Urea resin
Urea resin is a polycondensate of urea and formaldehyde, while 390930 is other amino resins, such as thiourea resin. The difference lies in the type of amino compound.
390920 - Melamine resin
Melamine resin is a polycondensate of melamine and formaldehyde, while 390930 is other amino resins. The key difference is whether the raw material is melamine.
390940 - Phenolic resin
Phenolic resin is a polycondensate of phenols and aldehydes, belonging to phenolic resins, while amino resins are polycondensates of amino compounds and aldehydes. The chemical structures are different.
390799 - Other polyesters
Polyester resins are polycondensates of polyacids and polyols, different from the amino-aldehyde polycondensation mechanism of amino resins. Classification should be distinguished based on chemical composition.
392190 - Other plastic sheets, plates, films
If amino resin has been made into semi-finished products such as sheets, plates, films, etc., it should be classified under 3921, not under 3909 as primary forms.
Self-Check：
✓ Is it in primary form (liquid, powder, granules, etc.)?
✓ Is it produced by polycondensation of amino compounds with aldehydes?
✓ Is it not urea or melamine-formaldehyde resin?
✓ Is it not mixed or modified with other materials?
✓ Is it not made into semi-finished products or articles?
❓ FAQ
How to distinguish amino resin 390930 from 390910 and 390920? 390910 is urea resin, 390920 is melamine resin, and 390930 is other amino resins (such as thiourea resin, aniline-formaldehyde resin). The key difference lies in the type of amino compound: urea corresponds to 390910, melamine to 390920, and other amino compounds to 390930. Accurate chemical composition must be provided during declaration. Is amino resin solution classified under 390930? If amino resin is dissolved in a volatile solvent and the solvent content exceeds 50%, it is usually classified under Chapter 32 (paints, varnishes); if the solvent content does not exceed 50% and it is in primary form, it is classified under 390930. The specific classification should be determined according to chapter notes and tariff interpretations. How to classify modified amino resins? Modified amino resins, if they still retain the basic characteristics of amino resins and are in primary form, are generally classified under 3909. However, if after modification they become other polymers (such as alkyd-modified), they may be classified under other headings. Judgment should be based on chemical structure and tariff notes. Which code is for amino resin waste and scrap? Amino resin waste and scrap should be classified under 3915 (plastic waste and scrap), not 3909. However, note that if the waste and scrap are of a single resin and not mixed, they are still classified under 3915; if they are waste and scrap of articles, they are classified under the corresponding subheading of 3915. How to describe the appearance of amino resin during declaration? The appearance should accurately describe primary forms such as liquid, paste, powder, granules, flakes, etc. Avoid descriptions like 'lump' or 'sheet' that may be misunderstood as semi-finished products. If it is a solution, indicate the solvent type and content. How to fill in 'Composition and Content' in the declaration elements for amino resin? Composition and Content should list the main components and percentages, such as 'amino resin 95%, water 5%'. If additives are included, indicate their names and contents. For modified resins, specify the type of modifier. Ensure consistency with the test report. What documents are required for importing amino resin? Usually, contracts, invoices, packing lists, bills of lading, certificates of origin, composition test reports, MSDS, etc. are required. If dangerous goods are involved, dangerous goods packaging certificates are also required. Specific requirements are subject to customs. How to check the import tariff rate for amino resin? You can check the MFN rate, general rate, VAT rate, etc., by entering HS code 390930 on the General Administration of Customs website, China International Trade Single Window, or tariff query platforms. Tariff rates may be adjusted; it is recommended to refer to the latest tariff.
Q: How to distinguish amino resin 390930 from 390910 and 390920?
A: 390910 is urea resin, 390920 is melamine resin, and 390930 is other amino resins (such as thiourea resin, aniline-formaldehyde resin). The key difference lies in the type of amino compound: urea corresponds to 390910, melamine to 390920, and other amino compounds to 390930. Accurate chemical composition must be provided during declaration.
Q: Is amino resin solution classified under 390930?
A: If amino resin is dissolved in a volatile solvent and the solvent content exceeds 50%, it is usually classified under Chapter 32 (paints, varnishes); if the solvent content does not exceed 50% and it is in primary form, it is classified under 390930. The specific classification should be determined according to chapter notes and tariff interpretations.
Q: How to classify modified amino resins?
A: Modified amino resins, if they still retain the basic characteristics of amino resins and are in primary form, are generally classified under 3909. However, if after modification they become other polymers (such as alkyd-modified), they may be classified under other headings. Judgment should be based on chemical structure and tariff notes.
Q: Which code is for amino resin waste and scrap?
A: Amino resin waste and scrap should be classified under 3915 (plastic waste and scrap), not 3909. However, note that if the waste and scrap are of a single resin and not mixed, they are still classified under 3915; if they are waste and scrap of articles, they are classified under the corresponding subheading of 3915.
Q: How to describe the appearance of amino resin during declaration?
A: The appearance should accurately describe primary forms such as liquid, paste, powder, granules, flakes, etc. Avoid descriptions like 'lump' or 'sheet' that may be misunderstood as semi-finished products. If it is a solution, indicate the solvent type and content.
Q: How to fill in 'Composition and Content' in the declaration elements for amino resin?
A: Composition and Content should list the main components and percentages, such as 'amino resin 95%, water 5%'. If additives are included, indicate their names and contents. For modified resins, specify the type of modifier. Ensure consistency with the test report.
Q: What documents are required for importing amino resin?
A: Usually, contracts, invoices, packing lists, bills of lading, certificates of origin, composition test reports, MSDS, etc. are required. If dangerous goods are involved, dangerous goods packaging certificates are also required. Specific requirements are subject to customs.
Q: How to check the import tariff rate for amino resin?
A: You can check the MFN rate, general rate, VAT rate, etc., by entering HS code 390930 on the General Administration of Customs website, China International Trade Single Window, or tariff query platforms. Tariff rates may be adjusted; it is recommended to refer to the latest tariff.
⚠️ Disclaimer: HS code classification, declaration elements, tariff rates and regulatory conditions on this page are for reference only and do not constitute legal advice on customs classification. Tariff rates and regulations are subject to change; the latest announcements from the General Administration of Customs and on-site determinations shall prevail. Please consult professional customs brokers or customs authorities before import/export.