Sodium Aluminum Sulfate Hydrate
Sodium aluminum sulfate hydrate, also known as soda alum, is a double sulfate salt used in paper manufacturing and as a food additive (SAS). Its structure as a hydrated double sulfate of sodium and aluminum classifies it as an alum under tariff item 2833.30.00. The product is chemically defined and falls within chapter 28's scope, despite its food additive use.
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 a single sodium sulfate salt
Sodium sulfate alone is not an alum.
If the product is mixed with other food ingredients
Food preparations containing sodium aluminum sulfate with other additives may fall under chapter 21.
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
• For food additive use, ensure compliance with Health Canada's food additive regulations and provide a certificate of analysis
• Clearly state the end-use on customs documents to distinguish from industrial grades
• Keep records of the hydration state, as anhydrous forms may have different classifications
Related Products under Tariff item 2833.30.00
Ammonium Alum Powder
Ammonium alum powder, chemically ammonium aluminum sulfate dodecahydrate, is a double sulfate salt classified as an alum under heading 28.33. It is used in flameproofing textiles and as a component in baking powder. Its composition as a hydrated double sulfate of ammonium and aluminum places it squarely within the tariff item for alums.
Chrome Alum Crystals
Chrome alum crystals, or chromium potassium sulfate dodecahydrate, are a violet double sulfate salt used in leather tanning and as an analytical reagent. As a hydrated double sulfate of chromium and potassium, it meets the definition of an alum under tariff item 2833.30.00. The product is chemically defined and falls within chapter 28's scope for separate chemical compounds.
Ferric Ammonium Alum
Ferric ammonium alum, also known as ammonium iron(III) sulfate dodecahydrate, is a pale violet double sulfate salt used as a coagulant in water treatment and as a mordant in dyeing. Its structure as a hydrated double sulfate of ferric iron and ammonium qualifies it as an alum under tariff item 2833.30.00. This chemically defined compound is covered by chapter 28's provisions for separate chemical elements and compounds.
Food-Grade Potassium Alum
Food-grade potassium alum, or potassium aluminum sulfate dodecahydrate, is a high-purity double sulfate salt used as a pickling agent and for water clarification in food processing. Its chemically defined double sulfate composition classifies it as an alum under tariff item 2833.30.00. The FCC grade ensures suitability for food applications, but the classification remains within chapter 28 as a separate chemical compound.
Lab Grade Chrome Alum
Lab-grade chrome alum is a high-purity chromium potassium sulfate dodecahydrate intended for laboratory reagents and crystal growth experiments. As a chemically defined double sulfate salt, it is classified as an alum under tariff item 2833.30.00. The product's purity does not change its classification, as chapter 28 covers separate chemical compounds regardless of grade.
Pharmaceutical Grade Ammonium Alum
Pharmaceutical-grade ammonium alum, or ammonium aluminum sulfate dodecahydrate, is a USP-grade double sulfate salt used in topical astringents and pharmaceutical formulations. Its chemically defined nature and double sulfate structure classify it as an alum under tariff item 2833.30.00. The pharmaceutical grade does not alter its classification within chapter 28, as the product remains a separate chemical compound.