Norbornane tetracarboxylic dianhydride
Norbornane tetracarboxylic dianhydride is a bicyclic cyclanic compound with four carboxylic groups forming dual anhydride functionalities on a norbornane framework. As a separate chemically defined organic compound, it qualifies as a cyclanic polycarboxylic acid derivative under tariff item 2917.20.00. It is used in the production of polyimide films and high-performance polymers.
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 compound is acyclic rather than cyclanic
Acyclic polycarboxylic acid derivatives are classified under the acyclic subheading.
If the compound is aromatic rather than cyclanic
Aromatic polycarboxylic acid derivatives are covered by a different 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 dianhydride is not a polymer precursor that might be classified as a polymer in primary forms
• If it contains impurities, they must be incidental to its production
• Provide the CBSA with the chemical structure and purity certificate to support the classification
Related Products under Tariff item 2917.20.00
3,6-Endoxo-1,2,3,6-tetrahydrophthalic anhydride
3,6-Endoxo-1,2,3,6-tetrahydrophthalic anhydride is a bicyclic cyclenic anhydride with an oxygen-bridged norbornene structure fused to a phthalic anhydride moiety. It is a separate chemically defined organic compound and a derivative of a cyclenic polycarboxylic acid, falling under tariff item 2917.20.00. This compound is a key monomer for producing high-temperature-resistant polymers and resins.
Bicyclo[2.2.1]heptane-2,3-dicarboxylic anhydride
Bicyclo[2.2.1]heptane-2,3-dicarboxylic anhydride, also known as nadic anhydride, is a bicyclic cyclanic derivative with a norbornane framework and a fused anhydride group. As a separate chemically defined organic compound, it qualifies as a cyclanic polycarboxylic acid anhydride under tariff item 2917.20.00. It is primarily used as a curing agent for epoxy resins and in the production of alkyd resins.
Camphoric acid
Camphoric acid (1,2,2-trimethylcyclopentane-1,3-dicarboxylic acid) is a naturally derived cyclanic polycarboxylic acid with a bicyclic terpenoid structure. It is a separate chemically defined organic compound and fits the cycloterpenic category of tariff item 2917.20.00. This compound is used in pharmaceuticals, plasticizers, and as a chemical intermediate.
Cyclohexane-1,2-dicarboxylic acid
Cyclohexane-1,2-dicarboxylic acid is a cyclanic polycarboxylic acid with two carboxyl groups attached to adjacent carbons of a cyclohexane ring. As a separate chemically defined organic compound, it falls under tariff item 2917.20.00. This compound is used as an intermediate in the production of plasticizers, resins, and pharmaceuticals.
Cyclohexane-1,4-dicarboxylic acid
Cyclohexane-1,4-dicarboxylic acid is a symmetrical cyclanic polycarboxylic acid with carboxyl groups at the 1 and 4 positions of the cyclohexane ring. It is a separate chemically defined organic compound and falls under tariff item 2917.20.00. This compound is used in the synthesis of polymers, plasticizers, and pharmaceutical intermediates.
Cyclooctane-1,5-dicarboxylic acid
Cyclooctane-1,5-dicarboxylic acid is a medium-ring cyclanic polycarboxylic acid with carboxyl groups at the 1 and 5 positions of the cyclooctane ring. As a separate chemically defined organic compound, it fits tariff item 2917.20.00. This specialty chemical is used in research and development of new materials and catalysts.