Bicyclo[2.2.1]heptane-2,3-dicarboxylic anhydride
Also known as nadic anhydride, this bicyclic cyclanic derivative features a norbornane structure with fused anhydride functionality. Falls under HTS 2917.20.00.00 as a cyclanic polycarboxylic acid anhydride. Primarily used in high-performance epoxy resins for aerospace composites.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If acyclic polycarboxylic anhydride
Acyclic versions classified separately from cyclanic/bicyclic structures.
If polymerized into resin form
Polymerized forms become plastics of Chapter 39, not monomers of Chapter 29.
If containing additional heteroatoms
Heterocyclic compounds with nitrogen/oxygen in ring classified in 2933.
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Import Tips & Compliance
• Provide molecular structure diagrams showing bicyclic cyclanic nature vs. aromatic counterparts
• Include end-use statements if for defense applications requiring ITAR compliance
• Verify packaging prevents moisture absorption which could affect classification purity
Related Products under HTS 2917.20.00.00
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 falls under HTS 2917.20.00.00 as a separate chemically defined organic compound of the cyclanic polycarboxylic acids category. This compound is used in the production of plasticizers and resins.
Hexahydrophthalic anhydride
Hexahydrophthalic anhydride is the cyclic anhydride of cyclohexane-1,2-dicarboxylic acid, a derivative specifically covered by HTS 2917.20.00.00. This cyclanic compound is widely used in epoxy resin curing agents and alkyd resin production. It qualifies as a chemically defined derivative of cyclanic polycarboxylic acids.
Cyclohexane-1,4-dicarboxylic acid
A symmetrical cyclanic polycarboxylic acid with carboxyl groups at the 1 and 4 positions of the cyclohexane ring. Classified under HTS 2917.20.00.00 as a separate chemically defined cyclanic polycarboxylic acid. Used in polyester resin synthesis and pharmaceutical intermediates.
Tetrahydrophthalic anhydride
Tetrahydrophthalic anhydride is a partially hydrogenated cyclanic polycarboxylic acid anhydride covered by HTS 2917.20.00.00. The cyclohexene ring structure qualifies as cyclenic per the heading description. Widely used in unsaturated polyester resins and alkyd coatings.
Camphoric acid
Camphoric acid (1,2,2-trimethylcyclopentane-1,3-dicarboxylic acid) is a naturally-derived cyclanic polycarboxylic acid classified under HTS 2917.20.00.00. This bicyclic terpenoid structure fits the cycloterpenic subcategory. Used in pharmaceutical synthesis and fragrance chemistry.
Dimer acid
Dimer acids are oligomeric cyclanic polycarboxylic acids produced by clay-catalyzed dimerization of unsaturated fatty acids. Despite polymer nature, classified as chemically defined cyclanic polycarboxylic acids under HTS 2917.20.00.00 when meeting purity standards. Used in polyamide hot-melt adhesives.