Product classification
HS code for Monosodium phosphate: 2835.22
Phosphates, of mono- or disodium, whether or not chemically defined.
Classification of monosodium phosphate under HS 2835.22
Monosodium phosphate (MSP), also known as anhydrous monobasic sodium phosphate or sodium dihydrogen phosphate (NaH2PO4), is classified under HS code 2835.22. This classification is found in Chapter 28 (Inorganic chemicals). Heading 2835 covers phosphates, and subheading 2835.22 specifically groups mono- and disodium phosphates together. The classification is determined by the chemical composition of the salt, consisting of a sodium cation and a dihydrogen phosphate anion. MSP is widely utilized in water treatment, food processing as an emulsifier, and in pharmaceutical applications as a buffering agent. To remain in heading 2835, the substance must be a separate chemically defined compound. If the product is an aqueous solution, it remains in this code, but if it is mixed with other chemicals for a specific functional use, the classification may shift to a different chapter.
- Covers
- Monosodium phosphate anhydrous
- Monosodium phosphate monohydrate
- Monosodium phosphate dihydrate
- Sodium dihydrogen orthophosphate
- Food-grade monosodium phosphate
- Also under 2835.22
- Kraft Mac & Cheese (emulsifier)
- Baking Powder (leavening agent)
- Dishwasher Detergents (Cascade, Finish)
- pH Buffers (laboratory use)
- Laxatives (Fleet Enema)
Codes often confused with 2835.22
Common mistake. Monosodium phosphate is often misclassified with other sodium phosphates such as trisodium phosphate (2835.29) or sodium triphosphate (sodium tripolyphosphate), which is specifically assigned to 2835.31. It is also frequently confused with monopotassium phosphate (2835.24) due to their similar industrial uses. Another area of confusion is in the food industry; if MSP is part of a prepared "baking powder" mixture, it would be classified under 2102.30 rather than the chemical code 2835.22.
Top exporters and importers of HS 283522 (the code used for monosodium phosphate), 2025
In 2025, the largest exporter of HS 283522 (the code used for monosodium phosphate) in UN Comtrade data was Germany, with 40% of world exports; the largest importer in UN Comtrade data was the United States, with 13% 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 283522, not only monosodium phosphate.
Top exporters 2025 · share of world exports
- 1 Germany $65M 40% of world exports
- 2 China $28M 17% of world exports
- 3 United States $20M 12% of world exports
World total: $163M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $23M 13% of world imports
- 2 Canada $8.2M 4.5% of world imports
- 3 South Korea $7.9M 4.3% of world imports
World total: $184M 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 code for monosodium phosphate
Brazil classifies monosodium phosphate under NCM 2835.22.00: HS 2835.22 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about monosodium phosphate
What is the HS code for Monosodium phosphate?
The HS code for Monosodium phosphate is 283522 (Phosphates; of mono- or disodium, whether or not chemically defined). The HS code for monosodium phosphate is 2835.22.
How do I classify Monosodium phosphate for customs?
Monosodium phosphate is classified under HS code 283522 — Phosphates; of mono- or disodium, whether or not chemically defined. This is a 6-digit subheading level code.
Is disodium phosphate classified under the same HS code?
Yes, HS code 2835.22 covers both monosodium and disodium phosphates, as they are both orthophosphates of sodium with one or two hydrogen atoms replaced.
Which countries are the top exporters of monosodium phosphate (HS 283522)?
In 2025, the top exporters of HS 283522 (the code used for monosodium phosphate) in UN Comtrade data were Germany ($65M, 40% of world exports), China ($28M) and the United States ($20M). World exports came to about $163M, 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 monosodium phosphate (HS 283522)?
In 2025, the top importers of HS 283522 (the code used for monosodium phosphate) in UN Comtrade data were the United States ($23M, 13% of world imports), Canada ($8.2M) and South Korea ($7.9M). World imports came to about $184M, 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 Monosodium phosphate the same in all countries?
The base HS code 283522 for Monosodium 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 monosodium phosphate in Brazil?
In Brazil, monosodium phosphate (HS 283522) is classified under NCM 2835.22.00.