Trimellitic anhydride
Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde. > Aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives: > Other > Trimellitic anhydride
Duty Rate (from China)
Products classified under Tariff item 2917.39.00.10
2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane Dianhydride
2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, also known as 4,4'-(hexafluoroisopropylidene)bis(phthalic anhydride), is a separate chemically defined aromatic polycarboxylic anhydride. It is used in polyimides for optical applications and falls under this 'other' tariff item.
2917.39.004,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) 98% purity
4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) at 98% purity is a separate chemically defined aromatic polycarboxylic anhydride with a fluorinated bridge. It is used in high-performance polymers and falls under this 'other' tariff item.
2917.39.004-Sulfo-1,8-Naphthalic Anhydride
4-Sulfo-1,8-naphthalic anhydride is a sulfonated aromatic polycarboxylic anhydride, a separate chemically defined compound used as an intermediate in fluorescent brighteners and dye synthesis. It falls under this tariff item as an 'other' aromatic polycarboxylic anhydride derivative, not more specifically covered elsewhere in the subheading.
2917.39.006FDA Monomer -- 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride)
6FDA monomer, or 4,4'-(hexafluoroisopropylidene)bis(phthalic anhydride), is a chemically defined aromatic polycarboxylic anhydride used in polyimide synthesis. It is classified under this 'other' tariff item as it is not specifically named in the subheading.
2917.39.00Fluorinated Dianhydride 4,4'-HFIPA
Fluorinated dianhydride 4,4'-HFIPA, also known as 4,4'-(hexafluoroisopropylidene)bis(phthalic anhydride), is a separate chemically defined compound used in gas separation membranes. It falls under this 'other' tariff item as an aromatic polycarboxylic anhydride.
2917.39.00High Purity Naphthalic Anhydride for Dye Synthesis
High-purity naphthalic anhydride (>99%) is a separate chemically defined aromatic polycarboxylic anhydride used in perylene dye synthesis. It is classified under this 'other' tariff item as it is not specifically named elsewhere in the subheading.
2917.39.00Industrial Grade Naphthalic Anhydride Flakes
Industrial grade naphthalic anhydride flakes are a separate chemically defined aromatic polycarboxylic anhydride used in pigments and polymer modification. The flake form does not affect classification under this 'other' tariff item.
2917.39.00Industrial Phthalic Anhydride Molten
Molten phthalic anhydride is the same chemically defined compound as solid forms, delivered in heated tankers for direct industrial use. Its physical state does not affect classification under this tariff item as an 'other' aromatic polycarboxylic anhydride.
2917.39.00Naphthalic Anhydride 98% Pure
Naphthalic anhydride at 98% purity is a separate chemically defined aromatic polycarboxylic anhydride used in dyes and fluorescent brighteners. The purity level is within acceptable limits for classification under this 'other' tariff item.
2917.39.00Naphthalic Anhydride Technical Grade Powder
Technical grade naphthalic anhydride powder (95-98% purity) is a separate chemically defined compound with minimal impurities. It falls under this 'other' tariff item as an aromatic polycarboxylic anhydride not more specifically covered.
2917.39.00Phthalic Acid Crystals
Phthalic acid is a separate chemically defined aromatic polycarboxylic acid, used as an intermediate for phthalic anhydride and resins. It is classified under this 'other' tariff item as it is not specifically named elsewhere in the subheading.
2917.39.00Phthalic Anhydride 99.8% Pure Technical Grade
High-purity technical grade phthalic anhydride (99.8% min) is a separate chemically defined aromatic polycarboxylic anhydride. Trace impurities such as maleic anhydride are permitted under Chapter 29 note 1(a) as long as they do not render the product suitable for a specific use.
2917.39.00Phthalic Anhydride Flakes
Phthalic anhydride flakes are the same chemically defined compound as other physical forms, used in plasticizers and polyester resins. Physical form does not affect classification under this 'other' tariff item for aromatic polycarboxylic anhydrides.
2917.39.00Reagent Grade Naphthalic Anhydride ACS
Reagent grade naphthalic anhydride meeting ACS specifications is a separate chemically defined aromatic polycarboxylic anhydride for laboratory use. Classification under this 'other' tariff item applies regardless of quantity or grade.
2917.39.00Trimellitic Anhydride Powder
Trimellitic anhydride is a separate chemically defined aromatic polycarboxylic anhydride with three carboxylic groups, used in wire enamels and polyesters. It falls under this 'other' tariff item as it is not specifically named in the subheading.