HS code · 6-digit subheading
HS Code 2835.29 – Phosphates; (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined
HS code 2835.29 is the 6-digit subheading for phosphates, (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined. It is used for aluminum phosphate, magnesium phosphate, zinc phosphate, ferric phosphate and ammonium phosphate (other than diammonium/monoammonium).
What HS 2835.29 covers
This broad "other" category for phosphates encompasses a wide array of inorganic phosphate compounds, excluding specific sodium, potassium, and calcium phosphates already covered in more precise classifications (like 2835.22, 2835.24, 2835.25, 2835.26). These "other" phosphates find applications across various industrial sectors, including detergents, water treatment, metal surface treatment, and specialized ceramic production. Countries with advanced manufacturing industries and a need for diverse chemical inputs are primary importers. Exporters typically possess sophisticated chemical production facilities capable of synthesizing these specialized compounds. Understanding the specific chemical composition and intended end-use is paramount for accurate classification and trade, as this residual category captures many niche but critical phosphate derivatives. The trade in these phosphates reflects the complexity and specialization of modern industrial chemistry.
- Covers
- Aluminum phosphate
- Magnesium phosphate
- Zinc phosphate
- Ferric phosphate
- Ammonium phosphate (other than diammonium/monoammonium)
- Lithium phosphate
- Examples
- BASF (industrial chemicals)
- Lanxess (water treatment)
- Solvay (specialty phosphates)
- Chemetall (surface treatment)
Codes often confused with 2835.29
Common mistake. Misclassification often occurs with more specific phosphate codes like 283522 (mono- or disodium phosphates) or 283524 (potassium phosphates) if the exact cation is not clearly identified, or with 283526 if it's a calcium phosphate not specifically listed elsewhere.
Top exporters and importers of HS code 283529, 2025
In 2025, the largest exporter of HS code 283529 in UN Comtrade data was China, with 27% of world exports; the largest importer in UN Comtrade data was Indonesia, with 12% 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 China $80M 27% of world exports
- 2 France $51M 17% of world exports
- 3 Germany $49M 17% of world exports
World total: $295M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Indonesia $47M 12% of world imports
- 2 United States $36M 9.3% of world imports
- 3 Thailand $34M 8.8% of world imports
World total: $390M 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 2835.29 9
Brazil splits HS 2835.29 into 9 NCM codes, Mercosur's 8-digit tariff lines.
- 2835.29.10 Iron phosphateDe ferro
- 2835.29.20 Cobalt phosphateDe cobalto
- 2835.29.30 Copper phosphateDe cobre
- 2835.29.40 Chromium phosphateDe cromo
- 2835.29.50 Strontium phosphateDe estrôncio
- 2835.29.60 Manganese phosphateDe manganês
- 2835.29.70 Triammonium phosphateDe triamônio
- 2835.29.80 Trisodium phosphateDe trissódio
- 2835.29.90 Other phosphatesOutros
All Brazil NCM codes in heading 28.35 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2835.29
What is HS code 283529?
HS code 283529 is a 6-digit subheading in the Harmonized System that covers: Phosphates; (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined. This broad "other" category for phosphates encompasses a wide array of inorganic phosphate compounds, excluding specific sodium, potassium, and calcium phosphates already covered in more precise classifications (like 2835.22, 2835.24, 2835.25, 2835.26). These "other" phosphates find applications across various industrial sectors, including detergents, water treatment, metal surface treatment, and specialized ceramic production. Countries with advanced manufacturing industries and a need for diverse chemical inputs are primary importers. Exporters typically possess sophisticated chemical production facilities capable of synthesizing these specialized compounds. Understanding the specific chemical composition and intended end-use is paramount for accurate classification and trade, as this residual category captures many niche but critical phosphate derivatives. The trade in these phosphates reflects the complexity and specialization of modern industrial chemistry.
What products fall under HS code 283529?
Aluminum phosphate, Magnesium phosphate, Zinc phosphate, Ferric phosphate, Ammonium phosphate (other than diammonium/monoammonium), Lithium phosphate
What are common misclassifications for HS code 283529?
Misclassification often occurs with more specific phosphate codes like 283522 (mono- or disodium phosphates) or 283524 (potassium phosphates) if the exact cation is not clearly identified, or with 283526 if it's a calcium phosphate not specifically listed elsewhere.
Which countries are the top exporters of goods under HS code 283529?
In 2025, the top exporters of HS code 283529 in UN Comtrade data were China ($80M, 27% of world exports), France ($51M) and Germany ($49M). World exports came to about $295M, 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 283529?
In 2025, the top importers of HS code 283529 in UN Comtrade data were Indonesia ($47M, 12% of world imports), the United States ($36M) and Thailand ($34M). World imports came to about $390M, 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 283529 structured?
HS code 283529 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (35) identify the heading, and digits 5-6 (29) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 283529?
Brazil splits HS code 283529 into 9 NCM codes: 2835.29.10 (Iron phosphate), 2835.29.20 (Cobalt phosphate), 2835.29.30 (Copper phosphate), 2835.29.40 (Chromium phosphate), 2835.29.50 (Strontium phosphate), 2835.29.60 (Manganese phosphate), 2835.29.70 (Triammonium phosphate), 2835.29.80 (Trisodium phosphate), and more listed on this page. The first 6 digits of each match the HS code.