HS Code for Pyridine

Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group replaced by a nitrogen atom. Under the Harmonized System, pyridine is classified within Chapter 29, which encompasses organic chemicals. Specifically, it falls under heading 2933, which is reserved for heterocyclic compounds containing nitrogen hetero-atom(s) only. Within this heading, the six-membered ring structure of pyridine, when unfused and regardless of whether it is hydrogenated, is categorized under subheading 2933.31. This classification is strictly for the compound pyridine itself and its salts. The determination of this code relies on the chemical purity and the specific molecular arrangement defined in the General Rules for the Interpretation of the Harmonized System (GRI), specifically GRI 1, which dictates that classification is determined by the terms of the headings and any relative section or chapter notes. Because pyridine is a chemically defined compound, it must meet specific purity standards to remain in Chapter 29; otherwise, it might be classified as a mixture or a crude oil derivative in Chapter 27.

Products Included

• Pure pyridine (C5H5N)
• Pyridine hydrochloride
• Pyridine sulfate
• Pyridine nitrate
• Pyridine quaternary salts
• Analytical grade pyridine reagents

Common Misclassification

Pyridine is frequently confused with its derivatives, which are classified under HS code 2933.39. While pyridine itself is 2933.31, substituted pyridines like picolines, lutidines, and more complex pharmaceutical intermediates fall under the 'other' category. Additionally, crude pyridine bases extracted from coal tar are often misclassified here but should actually be placed under HS code 2707.50 if they are not chemically pure. It is essential to verify the CAS number and purity level to distinguish between the pure chemical and industrial mixtures.

FAQ

What is the HS code for Pyridine?

The specific HS code for pyridine and its salts is 2933.31.

Are pyridine derivatives like piperidine included in this code?

No, piperidine (hexahydropyridine) is classified under HS code 2933.32, as it is a specific hydrogenated version of the pyridine ring that has its own dedicated subheading.