Product classification
HS code for Silver oxide: 2843.29
Silver compounds, excluding silver nitrates.
Classification of silver oxide under HS 2843.29
Silver oxide is classified under HS code 2843.29. This code is part of the broader category for silver compounds, excluding silver nitrates. The Harmonized System organizes chemicals based on their elemental components and molecular structure. Silver oxide, being an inorganic compound where silver is the primary precious metal component, falls under heading 2843. This heading encompasses compounds of precious metals, whether they are inorganic or organic. Because silver nitrate has its own specific subheading (2843.21), all other silver compounds, including silver(I) oxide (Ag2O) and silver(II) oxide (AgO), are grouped into the residual subheading 2843.29. This classification is vital for customs purposes as it distinguishes pure chemical compounds from finished products like batteries or catalysts that might contain silver oxide but are classified elsewhere based on their function. The classification process follows the hierarchical structure of the HS nomenclature, moving from the general chapter (28) to the specific heading (2843) and finally the most appropriate subheading (2843.29). It is important to note that for a substance to be classified here, it must be a distinct chemical compound and not a mixture or a finished article. Silver oxide is widely used in the production of silver-oxide batteries and as a mild oxidizing agent in organic synthesis.
- Covers
- Silver(I) oxide (Ag2O)
- Silver(II) oxide (AgO)
- Battery grade silver oxide powder
- Chemical grade silver oxide for synthesis
- Also under 2843.29
- Sigma-Aldrich (various silver compounds)
- Alfa Aesar (various silver compounds)
- Johnson Matthey (precious metal chemicals)
- Umicore (precious metal chemicals)
- Heraeus (precious metal chemicals)
Codes often confused with 2843.29
Common mistake. A common misclassification occurs with HS code 8506.40, which is for silver oxide primary cells and batteries. Importers often confuse the raw chemical compound with the finished battery. Additionally, it is sometimes incorrectly placed under 2843.21 (silver nitrate) due to a lack of chemical specificity in documentation.
Top exporters and importers of HS 284329 (the code used for silver oxide), 2025
In 2025, the largest exporter of HS 284329 (the code used for silver oxide) in UN Comtrade data was the United Kingdom, with 75% of world exports; the largest importer in UN Comtrade data was Germany, with 19% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 284329, not only silver oxide.
Top exporters 2025 · share of world exports
- 1 United Kingdom $678M 75% of world exports
- 2 South Korea $64M 7.0% of world exports
- 3 Germany $40M 4.4% of world exports
World total: $908M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $50M 19% of world imports
- 2 Malaysia $37M 14% of world imports
- 3 Singapore $30M 11% of world imports
World total: $266M 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 codes for silver oxide
Brazil splits HS 2843.29 into 2 NCM codes. Pick the one that matches your product:
- 2843.29.10Silver vitellinate
- 2843.29.90Other silver compounds
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about silver oxide
What is the HS code for Silver oxide?
The HS code for Silver oxide is 284329 (Silver compounds; excluding silver nitrates). The HS code for silver oxide is 2843.29, which covers silver compounds other than silver nitrate.
How do I classify Silver oxide for customs?
Silver oxide is classified under HS code 284329 — Silver compounds; excluding silver nitrates. This is a 6-digit subheading level code.
Can silver oxide be classified under Chapter 71?
No, Chapter 71 covers precious metals in their elemental or alloyed form. Chemical compounds of precious metals, like silver oxide, are specifically directed to Chapter 28.
Which countries are the top exporters of silver oxide (HS 284329)?
In 2025, the top exporters of HS 284329 (the code used for silver oxide) in UN Comtrade data were the United Kingdom ($678M, 75% of world exports), South Korea ($64M) and Germany ($40M). World exports came to about $908M, 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 silver oxide (HS 284329)?
In 2025, the top importers of HS 284329 (the code used for silver oxide) in UN Comtrade data were Germany ($50M, 19% of world imports), Malaysia ($37M) and Singapore ($30M). World imports came to about $266M, 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.
Is the HS code for Silver oxide the same in all countries?
The base HS code 284329 for Silver oxide is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for silver oxide in Brazil?
Brazil splits HS 284329 into 2 NCM codes, so the right one for silver oxide depends on the product's details: 2843.29.10 (Silver vitellinate), 2843.29.90 (Other silver compounds).