Benzenesulfonic Acid
Benzenesulfonic acid is a sulfonated derivative of benzene (C6H5SO3H), a key intermediate in dye and detergent production. Classified under HTS 2904.99.47.00 as an 'other' aromatic sulfonated hydrocarbon derivative not specified elsewhere in heading 2904.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically listed under naphthalene derivatives
Naphthalene sulfonic acids have dedicated subheadings earlier in numerical order.
If considered sulfuric acid derivative rather than organic
Inorganic acids classify in Chapter 28, but aromatic substitution makes this organic.
If containing additional nitrogen functions beyond nitroso/nitrated
Additional amine functions would shift to nitrogen-function compounds in 2921.
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Import Tips & Compliance
• Include NMR or GC-MS analysis confirming sulfonation on aromatic ring for proper 2904 classification
• Comply with TSCA pre-manufacture notification if annual import volume exceeds 10,000 lbs
• Segregate from amines/ammonia during storage to prevent salt formation affecting purity specs
Related Products under HTS 2904.99.47.00
p-Toluenesulfonic Acid
p-Toluenesulfonic acid (PTSA) is a strong organic acid with the formula CH3C6H4SO3H, featuring a sulfonated aromatic hydrocarbon structure (toluene derivative). It falls under HTS 2904.99.47.00 as a sulfonated derivative of an aromatic hydrocarbon, used primarily as a catalyst in esterification and dehydration reactions.
Nitrotoluene (Mixture of Isomers)
Nitrotoluene consists of ortho-, meta-, and para-nitrotoluene isomers (CH3C6H4NO2), nitrated derivatives of toluene. Falls under HTS 2904.99.47.00 as aromatic nitrated hydrocarbons, used in explosives, dyes, and pharmaceutical intermediates.
Dodecylbenzenesulfonic Acid
Dodecylbenzenesulfonic acid (DDBSA) is an alkylbenzene sulfonated derivative used as a surfactant in detergents. Classified in HTS 2904.99.47.00 as a sulfonated aromatic hydrocarbon, whether halogenated or not, covering alkyl chain variants.
2,4-Dinitrotoluene
2,4-Dinitrotoluene (2,4-DNT) is a dinitrated toluene derivative used in polyurethane production and as explosive intermediate. It qualifies under HTS 2904.99.47.00 as a nitrated aromatic hydrocarbon derivative.
Dinonylnaphthalenesulfonic Acid
Dinonylnaphthalenesulfonic acid (DNNSA) is a branched alkyl naphthalene sulfonate used in oil additives and extractants. Falls under HTS 2904.99.47.00 as an aromatic sulfonated hydrocarbon derivative.
Nitrobenzene
Nitrobenzene (C6H5NO2) is the simplest nitrated aromatic hydrocarbon, used in aniline production and as solvent. Classified under HTS 2904.99.47.00 as an 'other' nitrated aromatic hydrocarbon.