Pyridine N-Oxide (CAS 694-59-7)
Pyridine N-oxide is a derivative of pyridine where an oxygen atom is bonded to the nitrogen, forming an N-oxide. It is used as an intermediate in organic synthesis, particularly in oxidation reactions. The compound retains the pyridine ring structure, and the N-oxide function does not exclude it from this tariff item, as it remains a separate chemically defined organic compound.
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 N-oxide is not considered pyridine or its salts
Other unfused pyridine ring compounds may fall under the residual subheading.
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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
• Verify that the product is not classified under heading 29.32 (heterocyclic compounds with oxygen hetero-atoms only), as the N-oxide function may be considered
• Provide the CAS number (694-59-7) and technical specifications
• Ensure the product is not mixed with other compounds, as mixtures may require different classification
Related Products under Tariff item 2933.31.00
2-Aminopyridine (CAS 109-06-8)
2-Aminopyridine is an aromatic amine derivative featuring an unfused pyridine ring with an amino group at the 2-position. It is primarily used as an intermediate in pharmaceutical and agrochemical synthesis. Despite the amino substitution, the compound retains the pyridine ring structure, which governs its classification under this tariff item.
2-Picoline (2-Methylpyridine) (CAS 109-06-8)
2-Picoline, also known as 2-methylpyridine, is a liquid alkyl derivative of pyridine with a methyl group at the 2-position. It is widely used in the production of agrochemicals, pharmaceuticals, and rubber chemicals. The single methyl substitution does not alter the fundamental pyridine ring structure, keeping it within the scope of this tariff item.
4-Dimethylaminopyridine (DMAP) (CAS 1122-58-3)
4-Dimethylaminopyridine (DMAP) is a pyridine derivative with a dimethylamino group at the 4-position, widely used as a nucleophilic catalyst in esterification and acylation reactions. Its classification is determined by the unfused pyridine ring, which is the core structural feature. DMAP is a separate chemically defined organic compound, meeting Chapter 29 requirements.
Pyridine-3-carboxylic Acid (Nicotinic Acid) (CAS 59-67-6)
Nicotinic acid, also known as pyridine-3-carboxylic acid or vitamin B3, is a pyridine derivative with a carboxylic acid group at the 3-position. It is essential for human nutrition and used in pharmaceutical and food applications. The pyridine ring structure is the primary determinant for classification under this tariff item, despite the carboxylic acid function.
Pyridine (CAS 110-86-1)
Pyridine is the base compound of this tariff item, a flammable, colorless liquid with the formula C5H5N, containing an unfused pyridine ring. It is used as a solvent and reagent in organic synthesis for pharmaceuticals, agrochemicals, and other industrial applications. As the parent compound, it is directly covered by this tariff item.
Pyridine Hydrochloride (CAS 628-13-7)
Pyridine hydrochloride is the crystalline salt formed from pyridine and hydrochloric acid, used as a catalyst and reagent in organic reactions. It contains the pyridine ring structure and is classified with the organic base per Chapter 29 Note 5(C)(1). The salt form is a separate chemically defined compound, meeting the requirements of this tariff item.