Pyridine Sulfate
Pyridine sulfate is the acidic salt formed from pyridine and sulfuric acid, used in analytical chemistry and as a reagent. Per Chapter 29 Note 5(C)(1), inorganic salts of organic compounds are classified with the organic compound, which is pyridine. The salt is a separate chemically defined compound, meeting the requirements of this tariff item.
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 salt is not specifically pyridine or its salts
Other pyridine ring salts may fall under the residual subheading.
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 not put up in forms for retail sale that could shift classification
• Provide the chemical composition and purity certificate
• Confirm the product is not a mixture, as Chapter 29 covers separate chemically defined compounds
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.