Product classification
HS code for Tricalcium phosphate: 2835.26
Phosphates, of calcium n.e.c. in item no. 2835.25, whether or not chemically defined.
Classification of tricalcium phosphate under HS 2835.26
Tricalcium phosphate is classified under HS code 2835.26. It falls within Chapter 28, which covers inorganic chemicals, specifically under Heading 2835 for phosphinates, phosphonates, and phosphates. While Heading 2835 covers various phosphates, subheading 2835.26 is designated for other phosphates of calcium, excluding dicalcium phosphate (calcium hydrogenorthophosphate), which has its own specific code. Tricalcium phosphate, often referred to as bone phosphate of lime or tribasic calcium phosphate, is a chemically defined compound used in food production, pharmaceuticals, and industrial applications. The classification is driven by the chemical composition and the degree of neutralization of the phosphoric acid. It must be a chemically defined compound to remain in Chapter 28; if it were a natural mineral, it would be classified in Chapter 25. The classification follows GRI 1 and 6, as the product is specifically described by the subheading text. This compound is widely used as an anti-caking agent in powdered foods and as a nutritional supplement, but its classification remains strictly based on its chemical identity as a calcium phosphate other than the dicalcium variety.
- Covers
- Pure tricalcium diphosphate
- Food-grade tricalcium phosphate (E341 iii)
- Tribasic calcium phosphate
- Precipitated calcium phosphate
- Bone ash (if consisting of chemically defined tricalcium phosphate)
- Also under 2835.26
- Nutri-Phos (feed grade)
- Phos-Feed (fertilizer)
- ICL (calcium phosphates)
- Innophos (food additives)
Codes often confused with 2835.26
Common mistake. Tricalcium phosphate is frequently confused with HS code 2835.25, which is specifically for calcium hydrogenorthophosphate (dicalcium phosphate). The two are chemically distinct based on the ratio of calcium to phosphate. Another common misclassification is HS code 2510, which covers natural calcium phosphates (apatite and phosphorite). If the product is a naturally occurring mineral that has not been chemically processed into a specific compound, it belongs in Chapter 25.
Top exporters and importers of HS 283526 (the code used for tricalcium phosphate), 2025
In 2025, the largest exporter of HS 283526 (the code used for tricalcium phosphate) in UN Comtrade data was China, with 25% of world exports; the largest importer in UN Comtrade data was the United States, with 9.6% of world imports. The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so it may also belong among the top importers.
Figures cover everything classified under HS 283526, not only tricalcium phosphate.
Top exporters 2025 · share of world exports
- 1 China $397M 25% of world exports
- 2 Russia* ~$181M 11% of world exports · partner records ↗
- 3 Morocco $168M 10% of world exports
World total: $1.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $156M 9.6% of world imports
- 2 Germany $107M 6.6% of world imports
- 3 France $63M 3.9% of world imports
The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so it may also belong among the top importers.
World total: $1.6B 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 tricalcium phosphate
Brazil classifies tricalcium phosphate under NCM 2835.26.00: HS 2835.26 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about tricalcium phosphate
What is the HS code for Tricalcium phosphate?
The HS code for Tricalcium phosphate is 283526 (Phosphates; of calcium n.e.c. in item no. 2835.25, whether or not chemically defined). The HS code for tricalcium phosphate is 2835.26, which covers phosphates of calcium other than dicalcium phosphate.
How do I classify Tricalcium phosphate for customs?
Tricalcium phosphate is classified under HS code 283526 — Phosphates; of calcium n.e.c. in item no. 2835.25, whether or not chemically defined. This is a 6-digit subheading level code.
How does 2835.26 differ from 2835.25?
HS code 2835.25 is reserved specifically for dicalcium phosphate (calcium hydrogenorthophosphate), while 2835.26 covers all other calcium phosphates, including tricalcium phosphate.
Which countries are the top exporters of tricalcium phosphate (HS 283526)?
In 2025, the top exporters of HS 283526 (the code used for tricalcium phosphate) in UN Comtrade data were China ($397M, 25% of world exports), Russia (about $181M) and Morocco ($168M). World exports came to about $1.6B, 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 tricalcium phosphate (HS 283526)?
In 2025, the top importers of HS 283526 (the code used for tricalcium phosphate) in UN Comtrade data were the United States ($156M, 9.6% of world imports), Germany ($107M) and France ($63M). World imports came to about $1.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so it may also belong among the top importers.
Is the HS code for Tricalcium phosphate the same in all countries?
The base HS code 283526 for Tricalcium phosphate 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 tricalcium phosphate in Brazil?
In Brazil, tricalcium phosphate (HS 283526) is classified under NCM 2835.26.00.