Purified Isophthalic Acid (PIA)
Purified Isophthalic Acid (PIA) is high-purity isophthalic acid (>99.8%) produced via cyclohexane oxidation, used in high-performance coatings and specialty polyesters. It meets the criteria for tariff item 2917.39.00 as a chemically defined aromatic dicarboxylic acid.
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
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Import Tips & Compliance
• Provide a certificate of analysis showing purity above 99.8%
• Ensure the production process is documented if requested
• Verify that no impurities affect the chemically defined status
Related Products under Tariff item 2917.39.00
1,4-Naphthalenedicarboxylic Acid
1,4-Naphthalenedicarboxylic acid, an aromatic polycarboxylic acid derived from naphthalene, used in high-performance polyester resins and liquid crystal polymers. It is classified under tariff item 2917.39.00 as 'Other' aromatic polycarboxylic acids and their derivatives.
2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane Dianhydride
4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) is a fluorinated aromatic dianhydride used in producing colorless polyimides for optical applications. It is a separate chemically defined compound, and its classification under heading 29.17 is based on its structure as an aromatic polycarboxylic anhydride.
4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) 98% purity
4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) at 98% purity is a high-purity aromatic polycarboxylic anhydride used in polyimide synthesis. It is a separate chemically defined compound, and the purity level ensures it meets the definition under Chapter 29.
4,5,6,7-Tetrabromophthalic Anhydride
4,5,6,7-Tetrabromophthalic Anhydride is a pure halogenated aromatic polycarboxylic acid anhydride used in reactive flame retardant synthesis for unsaturated polyester resins. It falls under tariff item 2917.39.00 as an 'Other' aromatic polycarboxylic acid derivative.
4-Sulfo-1,8-Naphthalic Anhydride
4-Sulfo-1,8-naphthalic anhydride is a sulfonated aromatic polycarboxylic anhydride used in the production of fluorescent brighteners and dye intermediates. It is a separate chemically defined organic compound, and its sulfonation does not remove it from the scope of heading 29.17, as the derivatives are covered by the heading's text.
6FDA Monomer -- 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride)
6FDA, or 4,4'-(hexafluoroisopropylidene)bis(phthalic anhydride), is a fluorinated dianhydride used in synthesizing polyimides with high thermal and chemical resistance. It is a separate chemically defined aromatic polycarboxylic anhydride, and its classification under heading 29.17 is clear.