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 ring. It is a separate chemically defined organic compound that qualifies as a cyclenic polycarboxylic acid derivative under tariff item 2917.20.00. This compound is primarily used as a monomer in high-temperature-resistant polymers and resins.
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 not specifically cyclanic, cyclenic, or cycloterpenic
Other acyclic polycarboxylic acids and derivatives fall under this alternative.
If the compound is aromatic rather than cyclenic
Aromatic polycarboxylic acids and derivatives are classified separately.
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 clearly identified as a separate chemically defined compound with purity suitable for industrial use
• Provide a safety data sheet (SDS) to the CBSA if required, as anhydrides may be regulated
• Verify if the product requires a permit under the Canadian Environmental Protection Act (CEPA) before importation
Related Products under Tariff item 2917.20.00
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 anhydride with a norbornane structure. It is a separate chemically defined organic compound that fits the description of cyclanic polycarboxylic acid derivatives under tariff item 2917.20.00. This compound is primarily used in epoxy curing agents and specialty polymers.
Camphoric acid
Camphoric acid, or 1,2,2-trimethylcyclopentane-1,3-dicarboxylic acid, is a naturally derived cycloterpenic polycarboxylic acid. It is a separate chemically defined organic compound that falls under tariff item 2917.20.00 as a cycloterpenic polycarboxylic acid. This compound is used in pharmaceuticals 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 a cyclohexane ring. It is a separate chemically defined organic compound that falls under tariff item 2917.20.00 as a cyclanic polycarboxylic acid. This compound is used as an intermediate in the production of plasticizers and resins.
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 that falls under tariff item 2917.20.00 as a cyclanic polycarboxylic acid. This compound is used in the production of polymers and specialty chemicals.
Cyclooctane-1,5-dicarboxylic acid
Cyclooctane-1,5-dicarboxylic acid is a medium-ring cyclanic polycarboxylic acid with carboxyl groups at positions 1 and 5 of the cyclooctane ring. It is a separate chemically defined organic compound that falls under tariff item 2917.20.00 as a cyclanic polycarboxylic acid. This compound is used in specialty chemical applications.
Dimer acid
Dimer acid is an oligomeric cyclanic polycarboxylic acid produced by clay-catalyzed dimerization of unsaturated fatty acids. It is classified under tariff item 2917.20.00 as a cyclanic polycarboxylic acid, despite its polymeric nature, because it is a chemically defined organic compound. This product is commonly used as a building block for polyamide resins, adhesives, and corrosion inhibitors.