Tetramethylammonium Hydroxide (TMAH) 25% Solution
Tetramethylammonium hydroxide (TMAH) 25% solution is a quaternary ammonium hydroxide used in semiconductor manufacturing. The aqueous solution is covered by Chapter 29 note 1(d).
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 solution contains other chemicals or additives
Mixed chemical products not separately defined are classified in heading 38.24.
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
• Confirm the concentration is exactly as declared and the solution is aqueous
• Provide the chemical purity and safety data sheet to CBSA
Related Products under Tariff item 2923.90.00
Aliquat 336 (Tricaprylylmethylammonium Chloride)
Aliquat 336 is a quaternary ammonium chloride salt with long alkyl chains, used as a phase-transfer catalyst and metal extractant. It is a separate chemically defined organic compound, fitting heading 29.23 for quaternary ammonium salts.
Benzalkonium Chloride 50% Solution
Benzalkonium chloride 50% solution is a quaternary ammonium salt used as a biocide and preservative. The aqueous solution is covered by Chapter 29 note 1(d), which includes products dissolved in water.
Cetrimonium Chloride
Cetrimonium chloride is a quaternary ammonium salt with a cetyl chain, used in hair conditioners and antiseptics. It is a separate chemically defined organic compound under heading 29.23.
Cetyltrimethylammonium Bromide (CTAB)
Cetyltrimethylammonium bromide (CTAB) is a quaternary ammonium salt used as a cationic surfactant in DNA extraction and as an antimicrobial. It is a chemically defined compound under heading 29.23.
Choline Bitartrate Powder
Choline bitartrate is the bitartrate salt of choline, a quaternary ammonium compound used in dietary supplements. As a salt of an organic compound, it is classified under heading 29.23 per Chapter 29 note 5(C).
Choline Chloride Feed Grade
Choline chloride feed grade is a quaternary ammonium salt used as a nutritional supplement in animal feed. It is a separate chemically defined compound under heading 29.23.