Isoquinoline
Isoquinoline is a heterocyclic aromatic organic compound with a benzene ring fused to a pyridine ring. It is imported under HTS 2934.99.90.01 as other heterocyclic compounds and used in alkaloid synthesis and as a corrosion inhibitor.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pyridine ring predominates in structural description
Unsubstituted pyridine compounds are specifically provided for in 2933.39.
If purity <95% and considered aromatic hydrocarbon
Insufficient heteroatom character shifts classification to carbocyclic compounds.
If when imported as formulated anti-corrosion additive
Antiknock preparations and additives containing Chapter 29 compounds go to heading 3811.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide flash point data (108°C) for proper IMDG Class 6.1 hazardous material declaration
• Include end-use statement if for pharmaceutical synthesis to qualify for duty exemptions
• Test for pyridine content impurities which could trigger different classification
Related Products under HTS 2934.99.90.01
Quinazoline
Quinazoline is a bicyclic heterocyclic compound featuring a fused benzene and pyrimidine ring, classified under HTS 2934.99.90.01 as 'other' heterocyclic compounds. It serves as a key intermediate in pharmaceutical synthesis for drugs targeting cancer and neurological disorders.
Pteridine
Pteridine is a fused pyrimido-pyrimidine heterocyclic system used in biochemical research and as a precursor for folate derivatives. It falls under HTS 2934.99.90.01 as other heterocyclic compounds not specifically named elsewhere in heading 2934.
Purine
Purine is the parent bicyclic heterocyclic compound (imidazole fused with pyrimidine) forming the core of adenine and guanine. Classified in HTS 2934.99.90.01 as other heterocyclic compounds, serving as a nucleic acid base precursor.
1,8-Naphthyridine
1,8-Naphthyridine is a rigid bicyclic heterocyclic compound with nitrogen atoms at positions 1 and 8, used in metal coordination chemistry. Falls under HTS 2934.99.90.01 as other heterocyclic nitrogen compounds not elsewhere specified.
Oxazole
Oxazole is a five-membered heterocyclic aromatic ring containing oxygen and nitrogen atoms. Classified under HTS 2934.99.90.01 as other heterocyclic compounds, it is used in pharmaceutical intermediates and agrochemicals.
Benzotriazole
Benzotriazole is a heterocyclic compound with fused benzene and triazole rings, widely used as a corrosion inhibitor in antifreeze and metalworking fluids. HTS 2934.99.90.01 covers it as other heterocyclic compounds.