HS code · 4-digit heading
HS Code 38.04 – Residual lyes from the manufacture of wood pulp, whether or not concentrated, desugared or chemically treated, including lignin sulphonates, but excluding tall oil of heading no. 3803
What HS 38.04 covers
Heading 3804 encompasses residual lyes derived from the manufacture of wood pulp, a critical by-product often referred to as 'black liquor' in its crude form. This classification specifically includes these lyes whether they are concentrated, desugared, or chemically treated, and explicitly mentions lignin sulphonates. Lignin sulphonates are polymers derived from lignin, a complex organic polymer found in the cell walls of plants. They are widely utilized across various industries due to their excellent binding, dispersing, and sequestering properties. This heading provides a home for these valuable industrial chemicals, distinguishing them from other wood-derived products. The scope is broad, covering various states and treatments of the lyes, but it specifically excludes tall oil, which falls under heading 3803. This distinction is crucial for accurate customs classification, as tall oil is another significant by-product of wood pulping but with different chemical compositions and primary uses. Proper classification under 3804 is vital for trade compliance, affecting duties, taxes, and regulatory adherence, especially concerning environmental and chemical substance regulations. As a key component of Section VI (Products of the Chemical or Allied Industries), it highlights the transformation of raw materials into industrial intermediates, showcasing the economic significance of wood pulp by-products.
- Covers
- Lignin sulphonate powder
- Calcium lignosulphonate
- Sodium lignosulphonate
- Ammonium lignosulphonate
- Magnesium lignosulphonate
- Desugared lignin sulphonates
- Concentrated residual lyes from wood pulp
- Chemically treated wood pulp lyes
- Lignin-based concrete admixtures
- Animal feed binders containing lignin sulphonates
- Dust suppressants derived from lignin sulphonates
- Soil conditioners with lignin content
- Dispersants for dyes and pigments
- Water reducing agents for cement
- Micronutrient chelating agents
- Tanning agents for leather
- Oil well drilling fluid additives
- Emulsifiers for asphalt
- Gypsum board binders
- Pesticide dispersants
- Foundry sand binders
- Carbon black dispersants
- Briquetting agents
- Electroplating additives
- Examples
A Finnish chemical manufacturer exports concentrated sodium lignosulphonate, used as a concrete additive, to construction companies in Germany via the Baltic Sea route. This product, classified under 3804, helps improve concrete workability and strength. Simultaneously, a Canadian pulp mill sells its desugared calcium lignosulphonate by-product to agricultural suppliers in the United States, where it's used as a binder in animal feed pellets, transported by rail or truck across the border. Furthermore, a Brazilian producer ships lignin sulphonate powder to India for use as a dispersant in dye and pigment manufacturing, typically via ocean freight, illustrating the global demand for these versatile wood pulp derivatives.
Subheadings under 38.04 1
Codes often confused with 38.04
Common mistake. A common misclassification error involves confusing products of heading 3804 with tall oil (3803), which is explicitly excluded. While both are pulp mill by-products, tall oil is primarily fatty and resin acids, whereas 3804 covers lignin sulphonates and residual lyes. Another mistake is classifying highly purified lignin compounds as organic chemicals under Chapter 29 if they meet specific purity requirements, rather than as lyes or derivatives thereof. Lastly, some might mistakenly classify very crude, untreated black liquor as waste (Chapter 23 or 3825) instead of recognizing its potential as a valuable residual lye under 3804, even in an unconcentrated state, if it retains its characteristic composition.
Top exporters and importers of HS code 3804, 2025
In 2025, the largest exporter of HS code 3804 in UN Comtrade data was the United States, with 20% of world exports; the largest importer in UN Comtrade data was India, with 12% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 United States $70M 20% of world exports
- 2 Germany $59M 17% of world exports
- 3 Sweden $47M 13% of world exports
World total: $355M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $59M 12% of world imports
- 2 Sweden $40M 7.9% of world imports
- 3 China $35M 6.9% of world imports
World total: $509M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Questions about HS 38.04
What is HS code 3804?
HS code 3804 is a 4-digit heading in the Harmonized System that covers: Residual lyes from the manufacture of wood pulp, whether or not concentrated, desugared or chemically treated, including lignin sulphonates, but excluding tall oil of heading no. 3803. Heading 3804 encompasses residual lyes derived from the manufacture of wood pulp, a critical by-product often referred to as 'black liquor' in its crude form. This classification specifically includes these lyes whether they are concentrated, desugared, or chemically treated, and explicitly mentions lignin sulphonates. Lignin sulphonates are polymers derived from lignin, a complex organic polymer found in the cell walls of plants. They are widely utilized across various industries due to their excellent binding, dispersing, and sequestering properties. This heading provides a home for these valuable industrial chemicals, distinguishing them from other wood-derived products. The scope is broad, covering various states and treatments of the lyes, but it specifically excludes tall oil, which falls under heading 3803. This distinction is crucial for accurate customs classification, as tall oil is another significant by-product of wood pulping but with different chemical compositions and primary uses. Proper classification under 3804 is vital for trade compliance, affecting duties, taxes, and regulatory adherence, especially concerning environmental and chemical substance regulations. As a key component of Section VI (Products of the Chemical or Allied Industries), it highlights the transformation of raw materials into industrial intermediates, showcasing the economic significance of wood pulp by-products.
What products fall under HS code 3804?
Lignin sulphonate powder, Calcium lignosulphonate, Sodium lignosulphonate, Ammonium lignosulphonate, Magnesium lignosulphonate, Desugared lignin sulphonates, Concentrated residual lyes from wood pulp, Chemically treated wood pulp lyes, Lignin-based concrete admixtures, Animal feed binders containing lignin sulphonates, Dust suppressants derived from lignin sulphonates, Soil conditioners with lignin content, Dispersants for dyes and pigments, Water reducing agents for cement, Micronutrient chelating agents, Tanning agents for leather, Oil well drilling fluid additives, Emulsifiers for asphalt, Gypsum board binders, Pesticide dispersants, Foundry sand binders, Carbon black dispersants, Briquetting agents, Electroplating additives
What are common misclassifications for HS code 3804?
A common misclassification error involves confusing products of heading 3804 with tall oil (3803), which is explicitly excluded. While both are pulp mill by-products, tall oil is primarily fatty and resin acids, whereas 3804 covers lignin sulphonates and residual lyes. Another mistake is classifying highly purified lignin compounds as organic chemicals under Chapter 29 if they meet specific purity requirements, rather than as lyes or derivatives thereof. Lastly, some might mistakenly classify very crude, untreated black liquor as waste (Chapter 23 or 3825) instead of recognizing its potential as a valuable residual lye under 3804, even in an unconcentrated state, if it retains its characteristic composition.
Which countries are the top exporters of goods under HS code 3804?
In 2025, the top exporters of HS code 3804 in UN Comtrade data were the United States ($70M, 20% of world exports), Germany ($59M) and Sweden ($47M). World exports came to about $355M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 3804?
In 2025, the top importers of HS code 3804 in UN Comtrade data were India ($59M, 12% of world imports), Sweden ($40M) and China ($35M). World imports came to about $509M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 3804 structured?
HS code 3804 is a 4-digit heading under Chapter 38 of the Harmonized System. The first 2 digits (38) identify the chapter, and digits 3-4 (04) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.