Chapter 2904 — Customs Tariff Headings

2904.20.00Derivatives containing only nitro or only nitroso groups

2904.3Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride:

2904.9Other:

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Products classified under Tariff item 29.04

1,3,6/1,3,7-Naphthalenetrisulfonic Acid Technical Grade

Technical grade mixture of 1,3,6- and 1,3,7-naphthalenetrisulfonic acid is used in industrial dye synthesis. It contains only sulpho groups and falls under tariff item 2904.10.00 as a sulfonated hydrocarbon derivative. The mixture of isomers is covered under Chapter 29 Note 1(b) as a mixture of isomers of the same organic compound.

1,3,6-1,3,7-NTS Acid for Acid Dyes

A mixture of naphthalenetrisulfonic acid isomers (1,3,6 and 1,3,7) used as a diazo component in acid dye synthesis. This product contains only sulpho groups as functional derivatives of hydrocarbons, falling under tariff item 2904.10.00.

1,5-Naphthalenedisulfonic Acid

1,5-Naphthalenedisulfonic acid is a di-sulfonated naphthalene derivative containing only sulpho groups, explicitly provided for in tariff item 2904.10.00. It is widely used in the production of azo dyes and as an intermediate in organic synthesis. The product is a separate chemically defined compound meeting Chapter 29 requirements.

2-Anthracenesulfonic acid

2-Anthracenesulfonic acid is a chemically defined organic compound derived from anthracene, a polycyclic aromatic hydrocarbon, containing only sulpho groups. It falls under tariff item 2904.10.00 as a derivative containing only sulpho groups, their salts and ethyl esters.

2-Anthracenesulfonic acid for azo dye production

This 2-anthracenesulfonic acid is intended for dilution to standard strengths for the production of azo dyes, as specified in Chapter 29 Note 1(h). It remains classified under tariff item 2904.10.00 as a sulphonated hydrocarbon derivative containing only sulpho groups.

2-Anthracenesulfonic acid hydrate

2-Anthracenesulfonic acid hydrate is the parent compound dissolved in water, as permitted by Chapter 29 Note 1(d) for chemically defined products. It maintains classification under tariff item 2904.10.00 as a sulphonated hydrocarbon derivative containing only sulpho groups.

2-Anthracenesulfonic acid in transport solvent

This 2-anthracenesulfonic acid is dissolved in a solvent solely for safety or transport reasons, as permitted by Chapter 29 Note 1(e). The solvent does not render the product particularly suitable for a specific use, so it remains classified under tariff item 2904.10.00.

2-Anthracenesulfonic acid with anticaking stabilizer

This form of 2-anthracenesulfonic acid includes an anticaking agent necessary for preservation or transport, as permitted by Chapter 29 Note 1(f). The stabilizer does not alter the product's classification as a sulphonated hydrocarbon derivative containing only sulpho groups.

2-Anthracenesulfonic acid with identification colorant

This 2-anthracenesulfonic acid includes an added odoriferous substance for identification or safety reasons, as permitted by Chapter 29 Note 1(g). The additive does not render the product suitable for a specific use, so it remains classified under tariff item 2904.10.00.

3,5-Naphthalenedisulfonic Acid

3,5-Naphthalenedisulfonic acid is a naphthalene derivative containing only sulpho groups, consistent with the scope of tariff item 2904.10.00. It is used in dye coupling and as an intermediate in organic synthesis. Although not explicitly named, it falls under the heading as a chemically defined sulfonated hydrocarbon derivative.

4-Ethylbenzenesulfonic Acid

4-Ethylbenzenesulfonic acid features an ethyl substitution on the aromatic sulfonate ring, qualifying as a derivative containing only sulpho groups. Used in specialty surfactant synthesis, this product falls under tariff item 2904.10.00.

Alkyl Aryl Sulfonate

A generic alkyl aryl sulfonate (C12-C15 on benzene) meeting the specifications for derivatives containing only sulpho groups. This versatile surfactant base for institutional cleaners falls under tariff item 2904.10.00.

Benzene Sulfonic Acid Sodium Salt

Benzenesulfonic acid sodium salt is the simplest aromatic sulfonic salt under tariff item 2904.10.00. Used in dye intermediates and as a solubilizer, this product contains only sulpho groups as functional derivatives.

Benzenesulfonyl Chloride 98% Technical Grade

Benzenesulfonyl chloride is a sulfonated derivative of benzene containing only a sulpho group, its salt or ethyl ester form. It is a key intermediate in organic synthesis, used primarily for producing sulfonamides and dyes. This technical grade product, with 98% purity, falls under tariff item 2904.10.00 as a chemically defined sulfonated hydrocarbon derivative.

Benzenesulfonyl Chloride for Agrochemical Synthesis

Benzenesulfonyl chloride for agrochemical synthesis is a sulfonated benzene derivative used as an intermediate for sulfonylurea herbicides like metsulfuron-methyl. It contains only a sulpho group and is classified under tariff item 2904.10.00 as a pure chemically defined compound. The intended use as a pesticide intermediate does not alter its classification under Chapter 29.

Benzenesulfonyl Chloride in Toluene Solution 20%

A 20% solution of benzenesulfonyl chloride in toluene is a sulfonated benzene derivative dissolved in a solvent for safe handling and transport. Under Chapter 29 Note 1(e), such solutions are classified with the solute if the solvent is necessary for safety or transport and does not make the product suitable for a specific use. It falls under tariff item 2904.10.00.

Benzenesulfonyl Chloride Reagent Grade ACS

ACS reagent grade benzenesulfonyl chloride meets American Chemical Society standards for laboratory use in sulfonation reactions. It is a chemically defined sulfonated benzene derivative with only a sulpho group, classified under tariff item 2904.10.00. The reagent grade designation does not affect classification as long as it remains a separate chemically defined compound.

Benzenesulfonyl Chloride with Emetic Additive for Safety

Benzenesulfonyl chloride with an emetic additive is a sulfonated benzene derivative containing a safety substance to prevent accidental ingestion. Under Chapter 29 Note 1(g), such additives are permitted for identification or safety reasons without changing classification. It remains under tariff item 2904.10.00 as a chemically defined sulfonated hydrocarbon derivative.

Cumene Sulfonic Acid Sodium Salt

This sodium salt of cumene sulfonic acid is an aromatic sulfonate with isopropyl substitution, classified under tariff item 2904.10.00. Applied in hydrotropic formulations for cleaners, it contains only sulpho groups.

Dinonylnaphthalenesulfonic Acid

Dinonylnaphthalenesulfonic acid is a high molecular weight aromatic sulfonic acid under tariff item 2904.10.00. Used in metal extraction and oil additives, this product contains only sulpho groups as functional derivatives.

Dodecylbenzene Sulfonic Acid

Dodecylbenzene sulfonic acid (DDBSA) is a branched alkyl aromatic sulfonic acid under tariff item 2904.10.00. Essential raw material for high-foaming detergent production, this product contains only sulpho groups.

Dye Coupling Grade Naphthalenetrisulfonic Acid Isomer Mix

A specialty isomer mixture of 1,3,6- and 1,3,7-naphthalenetrisulfonic acids optimized for diazo coupling in azo pigment production. This chemically defined sulfonated naphthalene derivative falls under tariff item 2904.10.00.

Ethyl 2-Anthracenesulfonate

Ethyl 2-anthracenesulfonate is the ethyl ester of 2-anthracenesulfonic acid, explicitly covered under tariff item 2904.10.00 which includes ethyl esters of sulpho derivatives. It is used in organic synthesis for protecting groups and dye precursors.

High-assay 2-Anthracenesulfonic acid (99.5%)

High-assay 2-anthracenesulfonic acid at 99.5% purity is a chemically defined organic compound containing only sulpho groups. It falls under tariff item 2904.10.00 as a derivative containing only sulpho groups, their salts and ethyl esters.

High-Purity Benzenesulfonyl Chloride 99.5% for Pharma Intermediates

High-purity benzenesulfonyl chloride at 99.5% is a chemically defined sulfonated derivative of benzene, used in pharmaceutical synthesis of sulfonamide drugs like sulfamethoxazole. It contains only a sulpho group and its chloride form, meeting the scope of tariff item 2904.10.00. The purity level does not affect classification as long as it remains a separate chemically defined compound.

Industrial 2-Anthracenesulfonic acid drum pack

Industrial 2-anthracenesulfonic acid in bulk drum packs is a chemically defined organic compound containing only sulpho groups. It falls under tariff item 2904.10.00 as a derivative containing only sulpho groups, their salts and ethyl esters.

Industrial Benzenesulfonyl Chloride Bulk Drum Pack

Industrial benzenesulfonyl chloride in bulk drum packs is a chemically defined sulfonated benzene derivative used for large-scale dye manufacturing. It contains only a sulpho group and meets the purity requirements of Chapter 29. The bulk packaging does not affect classification under tariff item 2904.10.00.

Industrial Naphthalene-1,3,6,7-Trisulfonic Acid Blend

An industrial-grade 50/50 blend of 1,3,6- and 1,3,7-naphthalenetrisulfonic acids for synthetic dye production. This mixture of sulphonated hydrocarbon derivatives is classified under tariff item 2904.10.00.

Linear Alkylbenzene Sulfonic Acid (LABSA)

LABSA is a sulfonic acid derived from linear alkylbenzenes, featuring a single sulfo group on an aromatic ring, fitting tariff item 2904.10.00 criteria. It's a key intermediate for producing biodegradable detergents and emulsifiers.

m-Benzenedisulfonic Acid Sodium Salt

m-Benzenedisulfonic acid sodium salt is a sulfonated derivative of benzene with two sulfo groups and sodium counterions, classified under tariff item 2904.10.00. It serves as an intermediate in dye manufacturing and chemical synthesis. The sodium salt form is covered under Chapter 29 Note 5(C) as an inorganic salt of an organic compound.

Naphthyltrisulfonic Acid Mixture (1,3,6 & 1,3,7 Isomers)

A specific mixture of 1,3,6-naphthalenetrisulfonic acid and 1,3,7-naphthalenetrisulfonic acid isomers, classified as sulphonated derivatives of hydrocarbons containing only sulpho groups. This product falls under tariff item 2904.10.00.

p-Toluenesulfonyl Chloride

p-Toluenesulfonyl chloride (TsCl) is a sulfonyl chloride derivative of toluene, specifically named in tariff item 2904.10.00 as a sulfonated hydrocarbon derivative. It functions as a key protecting group reagent in organic synthesis, particularly for alcohols and amines. The product contains only a sulpho group and its chloride form.

Purified 2-Anthracenesulfonic acid (98% purity)

Purified 2-anthracenesulfonic acid at 98% purity is a refined version of the sulfonated anthracene derivative, free of significant impurities per Chapter 29 scope. It falls under tariff item 2904.10.00 as a derivative containing only sulpho groups.

Research quantity 2-Anthracenesulfonic acid (lab pack)

Research quantity 2-anthracenesulfonic acid in lab packs is a pure chemically defined sulfonated hydrocarbon under tariff item 2904.10.00. Packaging does not alter classification as it is not retail-specific.

Sodium 2-Anthracenesulfonate

Sodium 2-anthracenesulfonate is the sodium salt of 2-anthracenesulfonic acid, classified with the parent acid per Chapter 29 Note 5(C)(1) on inorganic salts of organic acids. It serves as a water-soluble intermediate for fluorescent dyes and falls under tariff item 2904.10.00.

Sodium m-Benzenedisulfonate Technical Grade

Technical grade sodium m-benzenedisulfonate is the sodium salt form of m-benzenedisulfonic acid, covered by tariff item 2904.10.00 for sulfonated aromatic derivatives. It is primarily used in wetting agents and dye intermediates. The technical grade designation does not affect classification as long as it remains a chemically defined compound.

Stabilized 2-Anthracenesulfonic acid powder

Stabilized 2-anthracenesulfonic acid powder includes a preservation stabilizer, as permitted by Chapter 29 Note 1(f). The stabilizer does not alter the product's classification as a sulphonated hydrocarbon derivative containing only sulpho groups.

Stabilized Benzenesulfonyl Chloride with Hydroquinone

Stabilized benzenesulfonyl chloride with hydroquinone contains an inhibitor to prevent polymerization during storage and transport. Under Chapter 29 Note 1(f), added stabilizers necessary for preservation are permitted without changing classification. It remains under tariff item 2904.10.00 as a chemically defined sulfonated hydrocarbon derivative.

Technical grade 2-Anthracenesulfonic acid

Technical grade 2-anthracenesulfonic acid contains minor impurities but remains a separate chemically defined compound under Chapter 29 Note 1(a). It classifies under tariff item 2904.10.00 as the specified sulfo derivative of anthracene.

TsCl 99% Pure for Synthesis

TsCl 99% pure for synthesis is high-purity p-toluenesulfonyl chloride, classified under tariff item 2904.10.00 as the specifically named sulfonated toluene derivative. It is essential for alcohol and amine protection in pharmaceutical and organic synthesis. The high purity level confirms it is a separate chemically defined compound.

1,3-Dinitro-5-chlorobenzene

1,3-Dinitro-5-chlorobenzene is a symmetrically substituted aromatic compound with two nitro groups and one chlorine atom on the benzene ring. It is used as a specialty chemical intermediate in the production of pharmaceuticals and agrochemicals. The nitro groups are the primary functional characteristic, placing it under derivatives containing only nitro groups.

1,3-Dinitrobenzene

1,3-Dinitrobenzene is a meta-dinitrated aromatic hydrocarbon used as an intermediate in dye manufacturing and as a laboratory reagent. Its molecule contains only nitro groups as functional substituents on the benzene ring, qualifying it as a derivative containing only nitro groups under tariff item 2904.20.00.

1-Fluoro-2,4-dinitrobenzene

1-Fluoro-2,4-dinitrobenzene, also known as Sanger's reagent, is a fluorinated dinitroaromatic compound used in peptide sequencing and protein chemistry. Despite the fluorine substituent, the molecule's principal functional groups are the two nitro groups, placing it under derivatives containing only nitro or only nitroso groups.

1-Nitronaphthalene

Alpha-nitronaphthalene (1-nitronaphthalene) is a solid nitroaromatic compound from naphthalene nitration. It is a separate chemically defined organic compound containing only a nitro group, classified under tariff item 2904.20.00.

2,4,6-Trinitrotoluene (TNT)

2,4,6-Trinitrotoluene, commonly known as TNT, is a yellow crystalline solid organic compound derived from toluene through nitration, containing three nitro groups. It falls under tariff item 2904.20.00 as a nitrated derivative.

2,4-Dinitrotoluene

2,4-Dinitrotoluene is a dinitrated aromatic hydrocarbon used primarily in the production of explosives, dyes, and organic intermediates. Its molecule contains two nitro groups and a methyl group on the benzene ring, with no other functional substituents, qualifying it as a derivative containing only nitro groups.

2,6-Dinitrotoluene

2,6-Dinitrotoluene is a symmetric dinitroaromatic compound used in the synthesis of energetic materials and specialty chemicals. The molecule contains two nitro groups positioned at the 2 and 6 positions relative to the methyl group, with no other functional substituents, qualifying it under derivatives containing only nitro groups.

2-Nitronaphthalene

Beta-nitronaphthalene (2-nitronaphthalene) is a solid from regioselective naphthalene nitration. This nitrated naphthalene isomer with a single nitro group is classified under tariff item 2904.20.00.

2-Nitrotoluene

2-Nitrotoluene is the ortho isomer of nitrotoluene, a mononitrated aromatic hydrocarbon used as an intermediate in dye, pigment, and explosive manufacturing. Its molecule contains a single nitro group and a methyl group on the benzene ring, with no other functional substituents, qualifying it as a derivative containing only nitro groups.

4-Nitroanisole

4-Nitroanisole, also known as 1-methoxy-4-nitrobenzene, is an aromatic compound with a nitro group para to a methoxy substituent. It is used as an intermediate in pharmaceutical and dye synthesis. The nitro group is the primary functional characteristic, and the methoxy group is an oxygen function that does not preclude classification under derivatives containing only nitro groups.

4-Nitrotoluene

4-Nitrotoluene is a mononitrated methylbenzene used in the synthesis of dyes, agrochemicals, and pharmaceuticals. Its molecule contains a single nitro group para to a methyl group on the benzene ring, with no other functional substituents, qualifying it as a derivative containing only nitro groups.

4-Nitrotoluene Flaked Form

4-Nitrotoluene in flaked solid form is a nitrated toluene derivative containing only nitro groups, classified under tariff item 2904.20.00. The flaking aids handling in manufacturing processes for explosives and pharmaceuticals.

Galaxolide 50% IPM Solution (Polycyclic Musk)

Galaxolide diluted to 50% in isopropyl myristate for safe perfume compounding transport. The solvent solution is a normal and necessary method of putting up the product for safety and transport, and does not render it particularly suitable for specific use, so it qualifies under Chapter 29 note 1(e).

High Purity p-Nitro-o-xylene 99.5%

High purity p-nitro-o-xylene (99.5%) is a refined chemical intermediate for pharmaceutical synthesis of nitroaromatic compounds. It precisely matches tariff item 2904.20.00 as a pure, separate nitrated hydrocarbon derivative.

High-Purity p-Nitrotoluene for Dye Synthesis

High-purity p-nitrotoluene specifically for azo dye production is a nitrated hydrocarbon derivative under tariff item 2904.20.00. It meets Chapter 29 criteria as a separate organic compound, distinguished from excluded dye products.

Mixed Nitrotoluenes (o/m-isomers)

Commercial mixture of ortho- and meta-nitrotoluene isomers (<5% para). This mixture of isomers of the same organic compound qualifies under Chapter 29 note 1(b) and is classified under tariff item 2904.20.00.

m-Nitrotoluene

Meta-nitrotoluene (3-nitrotoluene) is produced via selective nitration of toluene. It is a separate chemically defined organic compound containing only a nitro group, classified under tariff item 2904.20.00.

Molten Trinitrotoluene (Castable TNT)

Molten trinitrotoluene is heated TNT used for casting into explosive shells and munitions. It remains classified under tariff item 2904.20.00 as the pure nitrated hydrocarbon derivative, with heating solely for transport safety.

Musk Ambrette (2,6-Dinitro-3-methoxy-4-tert-butyltoluene)

Musk ambrette is a dinitro aromatic compound providing a sweet-fruity musk note historically used in fragrances. It is a separate chemically defined organic compound containing only nitro groups as functional derivatives, falling under tariff item 2904.20.00.