HS code · 6-digit subheading
HS Code 2839.19 – Silicates; of sodium (excluding sodium metasilicates)
HS code 2839.19 is the 6-digit subheading for silicates, of sodium (excluding sodium metasilicates). It is used for sodium silicate solution (water glass), sodium orthosilicate, sodium disilicate, sodium polysilicate and powdered sodium silicate.
What HS 2839.19 covers
This HS code encompasses a broad category of sodium silicates, excluding the specific sodium metasilicates covered by 283911. This group includes various forms of sodium silicate, often referred to as "water glass," which are characterized by different SiO2:Na2O ratios. These compounds are typically traded as viscous liquids or solid powders/lumps. Their diverse applications stem from their adhesive, binding, and deflocculating properties. They are widely used in the production of detergents, adhesives, binders for foundry molds, coatings, and as flocculants in water treatment. Additionally, they serve as raw materials for silica gels and precipitated silica. The international trade involves chemical producers, manufacturers of construction materials, paper and pulp industries, and water treatment companies. Importers are often countries with significant industrial manufacturing, while exporters are typically nations with strong chemical production capabilities and access to raw materials. The specific ratio of silica to sodium oxide is a critical factor influencing their properties and end-use, and thus their trade.
- Covers
- Sodium silicate solution (water glass)
- Sodium orthosilicate
- Sodium disilicate
- Sodium polysilicate
- Powdered sodium silicate
- Anhydrous sodium silicate
- Sodium silicate for detergents
- Sodium silicate for adhesives
- Examples
- PQ Corporation Sodium Silicate
- W. R. Grace Sodium Silicate
- BASF Sodium Silicate
Codes often confused with 2839.19
Common mistake. This code is often confused with sodium metasilicates (283911) if the specific silicate ratio or "meta" designation is not clearly stated. It's also important to differentiate it from other alkali metal silicates (283990) if the cation is not sodium.
Top exporters and importers of HS code 283919, 2025
In 2025, the largest exporter of HS code 283919 in UN Comtrade data was Poland, with 15% of world exports; the largest importer in UN Comtrade data was the Netherlands, with 9.7% 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 Poland $73M 15% of world exports
- 2 China $70M 15% of world exports
- 3 Netherlands $60M 12% of world exports
World total: $482M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Netherlands $47M 9.7% of world imports
- 2 France $33M 6.7% of world imports
- 3 United States $31M 6.3% of world imports
World total: $491M 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.
Brazil NCM code for 2839.19
Brazil does not split HS 2839.19: its NCM code is 2839.19.00.
All Brazil NCM codes in heading 28.39 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2839.19
What is HS code 283919?
HS code 283919 is a 6-digit subheading in the Harmonized System that covers: Silicates; of sodium (excluding sodium metasilicates). This HS code encompasses a broad category of sodium silicates, excluding the specific sodium metasilicates covered by 283911. This group includes various forms of sodium silicate, often referred to as "water glass," which are characterized by different SiO2:Na2O ratios. These compounds are typically traded as viscous liquids or solid powders/lumps. Their diverse applications stem from their adhesive, binding, and deflocculating properties. They are widely used in the production of detergents, adhesives, binders for foundry molds, coatings, and as flocculants in water treatment. Additionally, they serve as raw materials for silica gels and precipitated silica. The international trade involves chemical producers, manufacturers of construction materials, paper and pulp industries, and water treatment companies. Importers are often countries with significant industrial manufacturing, while exporters are typically nations with strong chemical production capabilities and access to raw materials. The specific ratio of silica to sodium oxide is a critical factor influencing their properties and end-use, and thus their trade.
What products fall under HS code 283919?
Sodium silicate solution (water glass), Sodium orthosilicate, Sodium disilicate, Sodium polysilicate, Powdered sodium silicate, Anhydrous sodium silicate, Sodium silicate for detergents, Sodium silicate for adhesives
What are common misclassifications for HS code 283919?
This code is often confused with sodium metasilicates (283911) if the specific silicate ratio or "meta" designation is not clearly stated. It's also important to differentiate it from other alkali metal silicates (283990) if the cation is not sodium.
Which countries are the top exporters of goods under HS code 283919?
In 2025, the top exporters of HS code 283919 in UN Comtrade data were Poland ($73M, 15% of world exports), China ($70M) and the Netherlands ($60M). World exports came to about $482M, 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 283919?
In 2025, the top importers of HS code 283919 in UN Comtrade data were the Netherlands ($47M, 9.7% of world imports), France ($33M) and the United States ($31M). World imports came to about $491M, 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 283919 structured?
HS code 283919 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (39) identify the heading, and digits 5-6 (19) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 283919?
In Brazil, HS code 283919 is NCM 2839.19.00. The last two digits are 00 because Brazil does not split this HS code further.