Phthalic Anhydride
Phthalic anhydride is an acyclic polycarboxylic acid derivative produced by the oxidation of naphthalene or o-xylene, both aromatic hydrocarbons. It falls under HTS 2917.19.40.00 as it is derived in whole or in part from aromatic hydrocarbons and used primarily in plasticizers and resins. This classification applies to its pure chemical form meeting chapter 29 notes for separate chemically defined organic compounds.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fully saturated, non-aromatic derivative
Saturated acyclic polycarboxylic acids fall under 'other' without aromatic derivation requirement.
If imported as mixture with solvents exceeding transport limits
Solutions beyond Chapter 29 note (e) safety/transport criteria classify as chemical preparations.
If maleic anhydride isomer, regardless of aromatic source
Specific subheading exists for maleic anhydride derivatives even with aromatic origins.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Verify purity and certificate of analysis to confirm it meets 'separate chemically defined compound' criteria under Chapter 29 note (a)
• Provide documentation proving derivation from aromatic hydrocarbons like o-xylene to avoid reclassification
• Ensure proper Hazard Communication labeling as it's a corrosive substance; common pitfall is inadequate MSDS
Related Products under HTS 2917.19.40.00
Tetrahydrophthalic Anhydride
Tetrahydrophthalic anhydride is a hydrogenated derivative of phthalic anhydride, synthesized from aromatic precursors like o-xylene. Classified under HTS 2917.19.40.00 due to its partial aromatic hydrocarbon derivation and acyclic polycarboxylic acid anhydride structure. Used in epoxy resins and alkyd coatings.
Dimer Acid (Aromatic-Derived)
Dimer acids are high molecular weight acyclic dicarboxylic acids produced by dimerization of unsaturated fatty acids from aromatic petroleum fractions. Falls under HTS 2917.19.40.00 as acyclic polycarboxylic acids derived from aromatic hydrocarbons. Primarily used in polyamide hot melt adhesives.
Isophthalic Acid
Isophthalic acid (1,3-benzenedicarboxylic acid) is an acyclic polycarboxylic acid manufactured via oxidation of meta-xylene, an aromatic hydrocarbon. Classified in HTS 2917.19.40.00 due to its aromatic derivation and meeting Chapter 29 purity requirements. Key raw material for PET resins and coatings.
Aromatic Azelaic Acid Derivative
Azelaic acid derivatives produced via oxidative cleavage of aromatic oleic acid fractions, qualifying as acyclic nonanedioic acids from aromatic sources. HTS 2917.19.40.00 applies per derivation requirement and polycarboxylic acid structure. Used in pharmaceuticals and polymers.
Branched Aromatic Dicarboxylic Acid
Branched chain dicarboxylic acids synthesized from alkylated aromatic hydrocarbons via air oxidation processes. Meets HTS 2917.19.40.00 as acyclic polycarboxylic acids with documented aromatic derivation. Applications include specialty polyester production.