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Sourcing 4,4'-Bipyridine?
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research compound
Sourcing 4,4'-Bipyridine?
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4,4'-Bipyridine is an organic compound consisting of two pyridine rings connected at the 4-position. It is primarily known as a pyrolysis product in tobacco smoke and as a degradation product of the herbicide paraquat.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
The international HS code for 4,4'-Bipyridine (CAS 553-26-4) is 2933.39.
2933.39
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
4-pyridin-4-ylpyridine
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