Other
Amine-function compounds > Aromatic monoamines and their derivatives; salts thereof: > Toluidines and their derivatives; salts thereof: > Other: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Subheadings
Products classified under HTS 2921.43.90
p-Toluidine
p-Toluidine, also known as 4-methylaniline, is an aromatic monoamine derivative with the chemical formula C7H9N. It falls under HTS 2921.43.90 as a toluidine (methyl-substituted aniline) that is not specifically listed elsewhere in the subheading for toluidines and their salts. Commonly used in dye synthesis and as a chemical intermediate.
o-Toluidine Hydrochloride
o-Toluidine hydrochloride is the salt form of 2-methylaniline, a toluidine derivative used in pharmaceutical synthesis. Classified under HTS 2921.43.90 per Chapter Note (C)(1) as the salt retains classification of the parent aromatic monoamine. The hydrochloride improves handling and solubility for industrial applications.
m-Toluidine (3-Methylaniline)
m-Toluidine, or 3-methylaniline, is a meta-substituted toluidine used as an intermediate in agrochemical production. It qualifies under HTS 2921.43.90 as an 'other' toluidine derivative not covered by more specific subheadings. The methyl group distinguishes it from aniline (2921.42).
N-Ethyl-o-Toluidine
N-Ethyl-o-toluidine is an N-alkylated derivative of o-toluidine used in rubber accelerator production. It remains classified under HTS 2921.43.90 as a toluidine derivative; N-substitution doesn't change the principal aromatic monoamine characteristic. Purity >98% ensures Chapter 29 applicability.
4-Chloro-o-Toluidine
4-Chloro-o-toluidine is a halogenated toluidine derivative used in azo pigment synthesis. Classified in HTS 2921.43.90 as Chapter Notes confirm halogenated derivatives remain with parent amine classification. The dual substitution maintains toluidine identity.
Toluidine Blue O (Basic Blue 17)
Toluidine Blue O is a thiazine dye derived from toluidine, used in histology and microbiology staining. While primarily a colorant, its toluidine base and chemical purity qualify it under HTS 2921.43.90 rather than Chapter 32 when imported as pure compound. Pharmaceutical grade requires >85% purity.
Acetyl-p-Toluidine
Acetyl-p-toluidine (N-(4-methylphenyl)acetamide) is an acetylated toluidine used as a dye intermediate and analgesic precursor. The principal amine-function characteristic governs classification under HTS 2921.43.90 despite acetylation; oxygen-function subordinate per Chapter Notes.
2,4-Diamino-toluene (2,4-Toluenediamine)
2,4-Diaminotoluene is a diaminotoluidine used in polyurethane elastomers and hair dyes. Despite two amino groups, it retains toluidine classification under HTS 2921.43.90 as the methylaniline parent structure predominates. Purity specification critical for Chapter 29 entry.
p-Toluidine Sulfate
p-Toluidine sulfate is the sulfuric acid salt of p-toluidine used in diazo salt production for azo dyes. Chapter Note (C)(1) mandates classification with parent toluidine under HTS 2921.43.90. The sulfate enhances water solubility for dye coupling processes.
N-Methyl-p-Toluidine
N-Methyl-p-toluidine is a secondary amine derivative of p-toluidine used as a catalyst in epoxy resin curing. It qualifies under HTS 2921.43.90 as the toluidine parent structure remains principal characteristic despite N-methylation. Technical grade >97% purity required.
5-Amino-o-Cresidine
5-Amino-o-cresidine (5-amino-2-methoxy-toluidine) combines toluidine with methoxy substitution for reactive dye synthesis. Principal toluidine amine-function governs HTS 2921.43.90 classification; methoxy ether secondary per Chapter Note oxygen-function restrictions.
p-Toluidine Hydrochloride Monohydrate
p-Toluidine hydrochloride monohydrate contains one water molecule per formula unit, used in analytical chemistry standards. Chapter Note (d) explicitly includes such aqueous solutions/crystallized forms under HTS 2921.43.90 when constituting normal commercial practice.
2,5-Dimethoxy-p-Toluidine
2,5-Dimethoxy-p-toluidine serves as an intermediate for permanent hair dyes and polymer antioxidants. Despite dual ether functions, the toluidine amine remains principal characteristic for HTS 2921.43.90 classification per Chapter Note numerical order.
Fast Red Base B (4-Amino-2-Chloro-5-Methoxy-Toluidine)
Fast Red Base B is a substituted toluidine used as a diazo component for red pigment production. Complex substitution pattern retains toluidine classification under HTS 2921.43.90; pigment base purity >96% ensures chemical compound status.
p-Toluidine Technical Grade 98%
Technical grade p-toluidine at 98% purity contains minor toluidine isomers as impurities, suitable for dye manufacturing. Remains HTS 2921.43.90 as principal isomer identified and impurities don't constitute separate chemical entities per Chapter Notes.