Product classification
HS code for Strontium oxide: 2816.40
Oxides, hydroxides and peroxides, of strontium or barium.
Classification of strontium oxide under HS 2816.40
Strontium oxide is classified under HS code 2816.40. This code is part of the inorganic chemicals chapter and specifically covers the oxides, hydroxides, and peroxides of strontium or barium. Strontium oxide (SrO) is a basic oxide formed by the thermal decomposition of strontium carbonate or strontium nitrate. In the Harmonized System, chemicals are grouped by their elemental composition and functional groups. Heading 2816 groups strontium and barium compounds together because of their similar chemical properties as alkaline earth metals. The classification 2816.40 is used for the pure chemical substance. It is an important industrial material used in the manufacture of specialty glasses, particularly for television screens and optical equipment, where it helps block X-ray emissions and improves the refractive index of the glass.
- Covers
- Pure strontium oxide (SrO)
- Strontium hydroxide (Sr(OH)2)
- Strontium peroxide (SrO2)
- Anhydrous strontium oxide powder
- Strontium hydroxide monohydrate
- Also under 2816.40
- Solvay Barium Hydroxide
- Noah Chemicals Strontium Oxide
- Merck Barium Peroxide
Codes often confused with 2816.40
Common mistake. Strontium oxide is occasionally misclassified under 2816.10, which is the code for magnesium hydroxide and peroxide. While both are alkaline earth metal derivatives, the HS system separates them into distinct subheadings. Another common error is confusing it with strontium carbonate (2836.92). While strontium oxide is often derived from the carbonate, they are chemically distinct functional groups (oxide vs. carbonate) and must be declared under their respective headings. Furthermore, mixtures containing strontium oxide intended for specific catalytic uses might be moved to heading 38.15.
Top exporters and importers of HS 281640 (the code used for strontium oxide), 2025
In 2025, the largest exporter of HS 281640 (the code used for strontium oxide) in UN Comtrade data was China, with 74% of world exports; the largest importer in UN Comtrade data was South Korea, with 29% 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 281640, not only strontium oxide.
Top exporters 2025 · share of world exports
- 1 China $27M 74% of world exports
- 2 Germany $3.6M 9.8% of world exports
- 3 United States $1.6M 4.3% of world exports
World total: $37M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $13M 29% of world imports
- 2 Japan $11M 23% of world imports
- 3 United States $4.0M 8.8% of world imports
World total: $45M 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 strontium oxide
Brazil splits HS 2816.40 into 2 NCM codes. Pick the one that matches your product:
- 2816.40.10Barium hydroxide
- 2816.40.90Other strontium or barium (hydr)oxides, peroxides
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about strontium oxide
What is the HS code for Strontium oxide?
The HS code for Strontium oxide is 281640 (Oxides, hydroxides and peroxides, of strontium or barium). The HS code for strontium oxide, as well as strontium hydroxide and peroxide, is 2816.40.
How do I classify Strontium oxide for customs?
Strontium oxide is classified under HS code 281640 — Oxides, hydroxides and peroxides, of strontium or barium. This is a 6-digit subheading level code.
Does 2816.40 include barium compounds?
Yes, HS code 2816.40 covers the oxides, hydroxides, and peroxides of both strontium and barium.
Which countries are the top exporters of strontium oxide (HS 281640)?
In 2025, the top exporters of HS 281640 (the code used for strontium oxide) in UN Comtrade data were China ($27M, 74% of world exports), Germany ($3.6M) and the United States ($1.6M). World exports came to about $37M, 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 strontium oxide (HS 281640)?
In 2025, the top importers of HS 281640 (the code used for strontium oxide) in UN Comtrade data were South Korea ($13M, 29% of world imports), Japan ($11M) and the United States ($4.0M). World imports came to about $45M, 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 Strontium oxide the same in all countries?
The base HS code 281640 for Strontium 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 strontium oxide in Brazil?
Brazil splits HS 281640 into 2 NCM codes, so the right one for strontium oxide depends on the product's details: 2816.40.10 (Barium hydroxide), 2816.40.90 (Other strontium or barium (hydr)oxides, peroxides).