p-Toluenesulfonic Acid (PTSA)
p-Toluenesulfonic acid (PTSA) is a strong organic acid obtained by sulfonation of toluene, with the sulphonic group para to the methyl group on the benzene ring. It is a separate chemically defined organic compound, classifiable under heading 2904 as a sulphonated derivative of a hydrocarbon, and is widely used as a catalyst in organic synthesis.
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 contains only sulphonic groups directly linked to carbon
Subheading 2904.10 covers derivatives containing only sulphonic groups, which may be more specific than 2904.99.
If the product is a mixture not meeting the criteria for a separate chemically defined compound
Chapter 29 Note 1(a) limits the chapter to separate chemically defined organic compounds; other mixtures may fall under heading 3824.
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 product is the para isomer; mixtures of isomers are covered by Chapter 29 Note 1(b)
• If the product is hydrated (e.g
• monohydrate), the water of crystallization is acceptable
• Provide the purity and melting point data on the certificate of analysis for CBSA
Related Products under Tariff item 2904.99.00
1,2-Dichloro-4-nitrobenzene
1,2-Dichloro-4-nitrobenzene is a dihalogenated nitrobenzene with chlorine atoms at positions 1 and 2, and a nitro group at position 4. It is a nitrated and halogenated derivative of a hydrocarbon, classified under tariff item 2904.99.00 as 'Other'.
1,2-Dichloro-4-nitrobenzene Reagent Grade
1,2-Dichloro-4-nitrobenzene Reagent Grade is a high-purity version (>99%) for laboratory and fine chemical synthesis. It is a separate chemically defined compound classified under tariff item 2904.99.00, and is used in R&D applications.
1-Bromo-2-nitrobenzene
1-Bromo-2-nitrobenzene is a halogenated nitrated aromatic hydrocarbon with a benzene ring, bromine at position 1, and a nitro group at position 2. It is classified under tariff item 2904.99.00 as a nitrated and halogenated derivative of a hydrocarbon.
1-Bromo-2-nitrobenzene Technical Grade 98%
1-Bromo-2-nitrobenzene Technical Grade 98% is a technical grade version of the compound with 98% purity, meeting Chapter 29 requirements for separate chemically defined compounds. It is classified under tariff item 2904.99.00 and is used in industrial synthesis.
2,4-Dinitrotoluene
2,4-Dinitrotoluene (2,4-DNT) is a dinitrated toluene derivative used as an intermediate in the production of polyurethane foams and as a precursor in explosive manufacturing. It is a separate chemically defined organic compound with nitro groups directly linked to the aromatic ring, classifiable under heading 2904 as a nitrated derivative of a hydrocarbon.
2,4-Dinitrotoluene-5-sulfonic acid
2,4-Dinitrotoluene-5-sulfonic acid is a dinitro derivative of toluene with a sulfonic acid group, making it a sulphonated and nitrated derivative of a hydrocarbon. It is classified under tariff item 2904.99.00 as 'Other', and is used as an intermediate in dye and chemical synthesis.