Food-Grade Potassium Alum
Food-grade potassium alum is a high-purity double sulfate of potassium and aluminum, classified as an alum under heading 28.33. It is used as a pickling agent and in water clarification for food processing. Its compliance with food-grade standards does not affect its tariff classification.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is not a double sulfate but a single potassium or aluminum sulfate
The alum heading covers only double sulfate salts.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product meets Canadian Food Inspection Agency (CFIA) requirements for food additives
• Clearly mark the product as food-grade on the commercial invoice
• Be prepared to provide a certificate of analysis to confirm purity
Related Products under Tariff item 2833.30.00
Ammonium Alum Powder
Ammonium alum powder is a double sulfate salt of ammonium and aluminum, conforming to the chemical definition of alums under heading 28.33. It is used in flameproofing textiles and as a component in baking powder. Its classification as an alum is based on its hydrated double sulfate composition.
Chrome Alum Crystals
Chrome alum crystals consist of chromium potassium sulfate dodecahydrate, a double sulfate salt that qualifies as an alum under heading 28.33. It is primarily used in leather tanning and as a laboratory reagent. The presence of chromium in the trivalent state confirms its alum structure.
Ferric Ammonium Alum
Ferric ammonium alum is a double sulfate of iron and ammonium, meeting the definition of an alum under heading 28.33. It is used as a coagulant in water treatment and as a mordant in dyeing. Its hydrated double salt structure is characteristic of alums.
Lab Grade Chrome Alum
Lab-grade chrome alum is a high-purity chromium potassium sulfate double salt, classified as an alum under heading 28.33. It is used in laboratory reagents and crystal growth experiments. The chemically defined nature of the product supports its classification as an alum.
Pharmaceutical Grade Ammonium Alum
Pharmaceutical-grade ammonium alum is a highly purified double sulfate of ammonium and aluminum, classified as an alum under heading 28.33. It is used in topical astringents and pharmaceutical formulations. Its USP-grade purity does not change its chemical classification.
Potassium Alum Crystals
Potassium alum crystals are a hydrated double sulfate of potassium and aluminum, the classic alum under heading 28.33. They are used in water purification, leather tanning, and as a styptic agent. The double salt structure is definitive for classification as an alum.