Compounds having a tricyclic ring system
Heterocyclic compounds with nitrogen hetero-atom(s) only. > Other: > Other > Compounds having a tricyclic ring system
Duty Rate (from China)
Products classified under Tariff item 2933.99.00.30
1,3,3-Trimethyl-2-Methyleneindoline
1,3,3-Trimethyl-2-methyleneindoline is an indoline derivative used as a key intermediate in the production of photochromic dyes and other specialty chemicals. As a heterocyclic compound with a nitrogen hetero-atom, it is classified under tariff item 2933.99.00.
2933.99.001-Methylindole
1-Methylindole is a modified aromatic indole derivative with a methyl group at the nitrogen position, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound. This compound is commonly used in organic synthesis for pharmaceutical and chemical applications.
2933.99.002-Methylindole
2-Methylindole is a simple alkyl-substituted indole with methylation at position 2, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound. This compound is used in perfume synthesis and as a pharmaceutical intermediate.
2933.99.003-Acetylindole
3-Acetylindole contains a ketone functionality at position 3 of the indole structure, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound, with the heterocycle taking precedence over the ketone classification. This compound is an important intermediate for alkaloid synthesis.
2933.99.003-Aminocarbazole
3-Aminocarbazole is a carbazole derivative with an amino group substitution, maintaining the core heterocyclic nitrogen structure. It is used as an intermediate in pharmaceutical and dye synthesis and is classified under tariff item 2933.99.00.
2933.99.004-Carbazoleboronic Acid
4-Carbazoleboronic acid retains the core carbazole heterocyclic structure with a boronic acid substitution. It is used as an intermediate in organic synthesis and is classified under tariff item 2933.99.00 as an organo-inorganic compound.
2933.99.005-Methoxyindole
5-Methoxyindole contains a methoxy substitution on the benzene ring of indole, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound. This compound is a key intermediate for melatonin synthesis.
2933.99.006-Chloro-2-(4-Hydroxyphenoxy)quinoxaline Ethyl Propionate
6-Chloro-2-(4-Hydroxyphenoxy)quinoxaline Ethyl Propionate is a synonym for quizalofop-P-ethyl, a specific ethyl ester of a propionic acid derivative with a quinoxaline core. It is a separate chemically defined organic compound with nitrogen hetero-atoms only, classified under heading 29.33. This compound is used as a herbicide active ingredient.
2933.99.006-Fluoroindole
6-Fluoroindole is a halogenated indole derivative with fluorine at position 6, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound. The halogen does not trigger separate classification per Chapter 29 notes. This compound is used in pharmaceutical synthesis.
2933.99.009-Aminoacridine
9-Aminoacridine is an acridine derivative with an amino group at position 9, classified as a separate chemically defined organic compound with a nitrogen hetero-atom only. It falls under heading 29.33 as an 'other' heterocyclic compound, despite the additional nitrogen functionality. This compound is used in pharmaceutical intermediates.
2933.99.009H-Carbazole Flakes
9H-Carbazole flakes are the standard commercial presentation of this aromatic heterocyclic compound. It is used extensively in the production of carbazole violet pigments and pharmaceuticals and is classified under tariff item 2933.99.00.
2933.99.00Acetoacetyl-5-Amino Benzimidazolone
Acetoacetyl-5-amino benzimidazolone is an aromatic heterocyclic compound used as an intermediate in the synthesis of azo pigments and dyes. Its benzimidazolone ring contains nitrogen hetero-atoms, placing it under tariff item 2933.99.00.
2933.99.00Acridine
Acridine is a tricyclic aromatic heterocyclic compound containing a nitrogen hetero-atom in its central ring. It is classified under tariff item 2933.99.00 as a heterocyclic compound with nitrogen hetero-atom(s) only, since its structure is not more specifically covered elsewhere in Chapter 29. Acridine serves as a fundamental building block in the synthesis of dyes, pharmaceuticals, and other organic chemicals.
2933.99.00Acridine Orange Base
Acridine Orange Base is a dialkylamino-substituted acridine derivative used as a precursor in the synthesis of fluorescent dyes. It is classified under tariff item 2933.99.00 as a heterocyclic compound with nitrogen hetero-atom(s) only, based on its acridine core structure. The free base form is distinct from its hydrochloride salt, which would be classified separately.
2933.99.00Butyl (R)-2-[4-(5-trifluoromethyl-2-pyridinyloxy)phenoxy]propanoate
Butyl (R)-2-[4-(5-trifluoromethyl-2-pyridinyloxy)phenoxy]propanoate is a chiral heterocyclic compound containing a pyridine ring with a trifluoromethyl substituent and an aryloxypropanoate ester group. It is a separate chemically defined organic compound with a nitrogen hetero-atom only, falling under heading 29.33 as an 'other' heterocyclic compound. This substance is used as an intermediate or active ingredient in herbicide formulations.
2933.99.00Carbazole Powder
Carbazole powder is a tricyclic aromatic heterocyclic compound with nitrogen hetero-atoms, appearing as white to pale yellow flakes or powder. It is used in the production of dyes, pharmaceuticals, and other specialty chemicals and is classified under tariff item 2933.99.00.
2933.99.00Ethyl (R)-Quizalofop Technical Grade
Ethyl (R)-Quizalofop technical grade is the R-enantiomer of 2-[4-[(6-chloroquinoxalin-2-yl)oxy]phenoxy]propanoic acid ethyl ester, a high-purity chiral herbicide active ingredient. It is a separate chemically defined organic compound with nitrogen hetero-atoms only, falling under heading 29.33. This product is used in herbicide formulations for grass weed control.
2933.99.00Fenbuconazole Process Intermediate
Fenbuconazole Process Intermediate is a chemical intermediate in the multi-step synthesis of the fungicide fenbuconazole, specifically 1H-1,2,4-triazole-1-propanenitrile. It is classified under tariff item 2933.99.00 as a heterocyclic compound with nitrogen hetero-atom(s) only. This pure compound is imported for final formulation stages in fungicide production.
2933.99.00Fenbuconazole Pure Active Ingredient
Fenbuconazole Pure Active Ingredient is the chemically defined fungicide α-[2-(4-Chlorophenyl)ethyl]-α-phenyl-1H-1,2,4-triazole-1-propanenitrile. It is classified under tariff item 2933.99.00 as a specific nitrogen-heterocyclic compound. This pure form is used as the technical active ingredient in fungicide formulations.
2933.99.00Fenbuconazole Stabilized Crystals
Fenbuconazole Stabilized Crystals contain the active ingredient fenbuconazole with anti-caking agents added for preservation and transport. It is classified under tariff item 2933.99.00 as the additions are permitted under Chapter 29 Note 1(f). This stabilized form prevents clumping during transport and storage.
2933.99.00Fluazifop-P-butyl Active Ingredient
Fluazifop-P-butyl is the (R)-enantiomer of butyl 2-[4-(5-trifluoromethyl-2-pyridinyloxy)phenoxy]propanoate, a post-emergence herbicide for grass weed control. It is a separate chemically defined organic compound with a pyridine ring and nitrogen hetero-atom only, classified under heading 29.33. This active ingredient is used in agricultural herbicide formulations.
2933.99.00Haloxyfop-P-butyl Technical Grade
Haloxyfop-P-butyl technical grade is the (R)-enantiomer of butyl 2-[4-(5-trifluoromethyl-2-pyridinyloxy)phenoxy]propanoate, a selective graminicide active ingredient. It is a separate chemically defined organic compound with a nitrogen hetero-atom only, falling under heading 29.33. This technical grade product is used in the formulation of herbicides for grass weed control.
2933.99.00Indole
Indole is a bicyclic aromatic heterocyclic compound consisting of a benzene ring fused to a pyrrole ring, with a nitrogen hetero-atom. It is classified under tariff item 2933.99.00 as a heterocyclic compound with nitrogen hetero-atom(s) only. Indole is widely used as an intermediate in the synthesis of pharmaceuticals, agrochemicals, and fragrances.
2933.99.00Indole-3-Acetic Acid
Indole-3-Acetic Acid is a plant growth regulator (auxin) featuring a carboxylic acid functional group attached to the indole core. It is classified under tariff item 2933.99.00 because the heterocyclic indole structure takes precedence over the carboxylic acid function. This compound is used in horticulture and plant tissue culture applications.
2933.99.00Indole-3-Butyric Acid
Indole-3-Butyric Acid is a synthetic auxin with a four-carbon carboxylic acid chain attached to the indole ring. It is classified under tariff item 2933.99.00 as the heterocyclic indole structure takes precedence over the carboxylic acid function. This compound is widely used as a rooting hormone in plant propagation.
2933.99.00Indole-3-Carboxaldehyde
Indole-3-Carboxaldehyde features an aldehyde functional group at position 3 of the indole ring. It is classified under tariff item 2933.99.00 because the named heterocyclic compound takes precedence over the aldehyde function. This compound is used as an intermediate in the synthesis of pharmaceuticals and other fine chemicals.
2933.99.00Indole-3-Methanol
Indole-3-Methanol, also known as indole-3-carbinol, features a hydroxymethyl group attached to the indole ring. It is classified under tariff item 2933.99.00 as the heterocyclic structure takes precedence over the alcohol function. This compound is used in alkaloid total synthesis and as a dietary supplement precursor.
2933.99.00Indole-3-Propionic Acid
Indole-3-Propionic Acid features a three-carbon carboxylic acid chain attached to the indole ring. It is classified under tariff item 2933.99.00 because the indole heterocyclic structure takes precedence over the carboxylic acid function. This compound is used as a neurotransmitter precursor and antioxidant in research applications.
2933.99.00Lowilite 27 UV Absorber C7-C9 Esters
Lowilite 27 UV absorber consists of C7-C9 esters of 3-(2H-benzotriazol-2-yl)-5-(tert-butyl)-4-hydroxybenzene propanoic acid. This benzotriazole derivative protects polyolefins and engineering plastics from UV degradation and is classified under tariff item 2933.99.00 as a nitrogen heterocycle.
2933.99.00Myclobutanil 95% Technical Powder
Myclobutanil 95% Technical Powder is the chemically defined fungicide α-Butyl-α-(4-chlorophenyl)-1H-1,2,4-triazole-1-propanenitrile with minor stabilizers. It is classified under tariff item 2933.99.00 as a heterocyclic compound with nitrogen hetero-atom(s) only. The 95% purity with minor stabilizers is permitted under Chapter 29 Note 1(f).
2933.99.00Myclobutanil Reference Standard
Myclobutanil Reference Standard is a high-purity (>99%) analytical standard of α-Butyl-α-(4-chlorophenyl)-1H-1,2,4-triazole-1-propanenitrile. It is classified under tariff item 2933.99.00 as a chemically defined heterocyclic compound. This reference standard is used for analytical laboratory testing and quality control.
2933.99.00Myclobutanil Technical Grade Fungicide
Myclobutanil Technical Grade Fungicide is the chemically defined aromatic heterocyclic compound α-Butyl-α-(4-chlorophenyl)-1H-1,2,4-triazole-1-propanenitrile. It is classified under tariff item 2933.99.00 as a pure nitrogen-heterocyclic compound. This technical grade product is used as the active ingredient in fungicide formulations.
2933.99.00Photochromic Dye Intermediate Indoline
1,3,3-Trimethyl-2-methyleneindoline is a photochromic dye intermediate that reacts with spiropyrans to create color-changing materials for lenses and other applications. As a nitrogen heterocycle, it is classified under tariff item 2933.99.00.
2933.99.00Quizalofop-P-Ethyl 97% TC Powder
Quizalofop-P-Ethyl 97% TC Powder is a technical concentrate of quizalofop-P-ethyl at 97% purity, the named compound 2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propionic acid ethyl ester in powder form. It is a separate chemically defined organic compound with nitrogen hetero-atoms only, classified under heading 29.33. This powder is used as an active ingredient in herbicide formulations.
2933.99.00Quizalofop-P-Ethyl Herbicide
Quizalofop-P-Ethyl herbicide is chemically 2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]-propionic acid ethyl ester, a selective post-emergence herbicide used primarily for grass weed control in broadleaf crops. It is a separate chemically defined organic compound with nitrogen hetero-atoms only, falling under heading 29.33. This product is used as an active ingredient in agricultural herbicide formulations.
2933.99.00(R)-Haloxyfop-P-butyl Herbicidal Intermediate
(R)-Haloxyfop-P-butyl herbicidal intermediate is the pure (R)-enantiomer of butyl 2-[4-(5-trifluoromethyl-2-pyridinyloxy)phenoxy]propanoate, used as a key synthetic intermediate for enantiopure graminicide herbicides. It is a separate chemically defined organic compound with a nitrogen hetero-atom only, classified under heading 29.33. This intermediate is imported for further synthesis in herbicide production.
2933.99.00Targa Quizalofop-P-Ethyl Active Ingredient
Targa Quizalofop-P-Ethyl active ingredient is chemically identified as 2-[4-[(6-chloroquinoxalin-2-yl)oxy]phenoxy]propanoic acid ethyl ester, the active ingredient used in Targa herbicide. It is a separate chemically defined organic compound with nitrogen hetero-atoms only, classified under heading 29.33. This product is used as a herbicide active ingredient for grass weed control.
2933.99.00Tinuvin 292 Liquid UV Stabilizer
Tinuvin 292 is a liquid UV stabilizer consisting of 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methyl phenol in branched and linear forms. This benzotriazole-based absorber protects coatings and plastics from UV degradation and is classified under tariff item 2933.99.00.
2933.99.00Tinuvin 783 UV Absorber (C7-C9 Alkyl Esters)
Tinuvin 783 UV absorber consists of C7-C9 branched or linear alkyl esters of 3-(2H-benzotriazol-2-yl)-5-(tert-butyl)-4-hydroxybenzene propanoic acid. This hindered amine light stabilizer (HALS) is used in plastics and coatings and is classified under tariff item 2933.99.00.
2933.99.00Tryptophan
L-Tryptophan is an essential amino acid featuring an indole side chain attached to the alanine backbone. It is classified under tariff item 2933.99.00 because the heterocyclic nitrogen compound takes precedence over the amino acid function. This compound is used in pharmaceutical, nutritional, and animal feed applications.