Anhydrous Soda Ash (Disodium Carbonate)
Anhydrous soda ash is a pure, chemically defined form of disodium carbonate (Na2CO3) used primarily as a flux in glass manufacturing to lower melting temperatures. It meets the criteria of Chapter 28 Note 1(a) as a separate chemically defined compound and is not excluded by any chapter note.
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 |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is sodium hydrogencarbonate (bicarbonate) rather than disodium carbonate
Sodium hydrogencarbonate is a distinct carbonate salt classified separately.
If the product contains added organic stabilizers or is a mixture
Mixtures or stabilized carbonates may fall under other carbonate headings.
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 is pure Na2CO3 without added stabilizers or solvents that could shift classification
• Provide a certificate of analysis to the CBSA to confirm chemical identity
• Verify if anti-dusting agents are present, as they may affect tariff classification
Related Products under Tariff item 2836.20.00
Calcined Soda Ash for Glass Production
Calcined soda ash is thermally processed disodium carbonate optimized for glass production, meeting Chapter 28 Note 1(a) as a chemically defined compound. The calcination process does not alter its chemical identity as Na2CO3, so it remains classified under this tariff item.
Dense Soda Ash (Light Soda Ash Alternative)
Dense soda ash is a high-density granular form of disodium carbonate produced via the Solvay process, used in detergents and chemical synthesis. As a chemically defined compound meeting Chapter 28 Note 1(a), it falls under this tariff item regardless of physical form.
Granular Disodium Carbonate 99.5% Purity
Granular disodium carbonate at 99.5% purity is a chemically defined compound used as a cleaning agent in industrial boilers and textile processing. It meets Chapter 28 Note 1(a) as a separate chemically defined compound, and the granular form does not affect classification.
Sodium Carbonate Monohydrate (Crystal Soda)
Sodium carbonate monohydrate (Na2CO3·H2O) is a hydrated crystalline form of disodium carbonate used in water treatment and as a pH buffer. As a chemically defined compound with water of crystallization, it falls under Chapter 28 Note 1(a) and is not excluded by any note.
Technical Grade Soda Ash 99.2%
Technical grade soda ash with 99.2% Na2CO3 purity is a chemically defined compound used in paper manufacturing and effluent treatment. It meets Chapter 28 Note 1(a) as a separate chemically defined compound, and the technical grade designation does not affect classification.
Trona-Derived Synthetic Soda Ash
Trona-derived synthetic soda ash is processed from natural trona ore into disodium carbonate for soap and paper industries. After processing, it is a chemically defined compound meeting Chapter 28 Note 1(a), and the source material does not affect classification.