Product classification
HS code for Dicalcium phosphate: 2835.25
Phosphates, calcium hydrogenorthophosphate (dicalcium phosphate), whether or not chemically defined.
Classification of dicalcium phosphate under HS 2835.25
Dicalcium phosphate, chemically known as calcium hydrogenorthophosphate, is classified under HS code 2835.25. Chapter 28 covers inorganic chemicals, and heading 2835 specifically includes phosphinates (hypophosphites), phosphonates (phosphites), and phosphates. Dicalcium phosphate is a phosphate of calcium. This classification applies to the chemical whether or not it is chemically defined. It is widely used as a dietary supplement in prepared animal feeds, as a tableting agent in pharmaceutical applications, and as a polishing agent in toothpaste. However, its classification in 2835.25 is based on its chemical identity as a distinct inorganic compound. The Harmonized System distinguishes between different calcium phosphates; while dicalcium phosphate is 2835.25, other phosphates like mono- or tricalcium phosphate may fall under 2835.26. The purity and intended use do not generally change the heading, provided the product remains a separate chemically defined compound.
- Covers
- Anhydrous dicalcium phosphate
- Dicalcium phosphate dihydrate
- Feed-grade dicalcium phosphate
- USP/BP grade dicalcium phosphate for pharmaceuticals
- Calcium hydrogenorthophosphate
- Also under 2835.25
- Purina Animal Feed (supplement)
- Centrum Multivitamins (filler)
- Toothpaste (some formulations)
- Baking Powder (leavening agent)
- Pet Food (Royal Canin, Hill's Science Diet)
Codes often confused with 2835.25
Common mistake. Dicalcium phosphate is often misclassified under HS code 3103, which covers mineral or chemical phosphatic fertilizers. While it contains phosphorus, it is rarely used as a primary fertilizer in its pure form. Another common error is classification under 2309, which covers preparations of a kind used in animal feeding. While dicalcium phosphate is an ingredient in animal feed, the pure chemical remains in Chapter 28 unless it is mixed with other nutrients or additives to form a complete feed preparation.
Top exporters and importers of HS 283525 (the code used for dicalcium phosphate), 2025
In 2025, the largest exporter of HS 283525 (the code used for dicalcium phosphate) in UN Comtrade data was China, with 39% of world exports; the largest importer in UN Comtrade data was Brazil, with 11% 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 283525, not only dicalcium phosphate.
Top exporters 2025 · share of world exports
- 1 China $178M 39% of world exports
- 2 Germany $57M 12% of world exports
- 3 Peru* ~$44M 9.6% of world exports · partner records ↗
World total: $462M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $65M 11% of world imports
- 2 Vietnam* ~$35M 6.1% of world imports · partner records ↗
- 3 Indonesia $35M 6.1% of world imports
World total: $575M 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 dicalcium phosphate
Brazil classifies dicalcium phosphate under NCM 2835.25.00: HS 2835.25 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dicalcium phosphate
What is the HS code for Dicalcium phosphate?
The HS code for Dicalcium phosphate is 283525 (Phosphates; calcium hydrogenorthophosphate (dicalcium phosphate), whether or not chemically defined). The HS code for dicalcium phosphate (calcium hydrogenorthophosphate) is 2835.25.
How do I classify Dicalcium phosphate for customs?
Dicalcium phosphate is classified under HS code 283525 — Phosphates; calcium hydrogenorthophosphate (dicalcium phosphate), whether or not chemically defined. This is a 6-digit subheading level code.
Is feed-grade dicalcium phosphate classified differently?
Generally, no. Even if intended for animal feed, the pure chemical compound is classified under 2835.25 unless it has been mixed into a prepared feed supplement.
Which countries are the top exporters of dicalcium phosphate (HS 283525)?
In 2025, the top exporters of HS 283525 (the code used for dicalcium phosphate) in UN Comtrade data were China ($178M, 39% of world exports), Germany ($57M) and Peru (about $44M). World exports came to about $462M, 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 dicalcium phosphate (HS 283525)?
In 2025, the top importers of HS 283525 (the code used for dicalcium phosphate) in UN Comtrade data were Brazil ($65M, 11% of world imports), Vietnam (about $35M) and Indonesia ($35M). World imports came to about $575M, 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 Dicalcium phosphate the same in all countries?
The base HS code 283525 for Dicalcium 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 dicalcium phosphate in Brazil?
In Brazil, dicalcium phosphate (HS 283525) is classified under NCM 2835.25.00.