Metanilic Acid (3-Aminobenzenesulfonic Acid)
Though containing sulfonic acid, metanilic acid classifies here as an amino-phenol derivative not qualifying as sulfonated under exclusion notes, with primary oxygen amino-function. It's a key intermediate for azo dyes. Falls under 'other' amino-phenols per hierarchy.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by sulfonic acid function over amino-oxygen
Sulfonic acids with amino groups may shift to 2921 if oxygen function not principal (chapter classification note 3).
If pre-diluted for azo dye coupler production
Diazo coupler preparations for dyes dilute to standard strengths exclude under note (h).
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Import Tips & Compliance
• Confirm via NMR/CoA that sulfur is NOT directly carbon-linked as sulfonated derivative to avoid 2930 misclassification
• Ship with anticaking stabilizer only if necessary for transport (note f); excess additives trigger specific-use exclusion
• Declare CAS 121-47-1 precisely; customs often challenges sulfonic acids against organo-sulfur headings
Related Products under HTS 2922.29.81.90
4-Aminophenol
4-Aminophenol is a chemically defined organic compound featuring both amino (-NH2) and hydroxy (-OH) groups attached to a benzene ring, classifying it as an oxygen-function amino-compound under heading 2922. It contains only one type of oxygen function (phenol) and no additional oxygen groups. Commonly used as an intermediate in pharmaceutical and dye production.
2-Aminophenol (o-Aminophenol)
2-Aminophenol is an amino-phenol with ortho-positioned amino and hydroxy groups on benzene, fitting HTS 2922.29 as an oxygen-function amino-compound with single oxygen function. Used primarily as a dye intermediate and in rubber antioxidants. Its structure excludes it from multi-oxygen function categories.
p-Aminosalicylic Acid (PAS)
p-Aminosalicylic acid features amino and single phenolic hydroxy with additional carboxylic acid, but classifies as oxygen-function amino-compound under 2922.29 'other'. Used as anti-tuberculosis pharmaceutical intermediate. Single phenolic oxygen function distinguishes it.
2-Amino-4-chlorophenol
This halogenated amino-phenol contains chloro substituent but retains single oxygen function classification under 2922.29 per notes on halogenated derivatives. Used in pesticide and dye synthesis. 'Other' category captures such substituted phenols.
N-(4-Aminophenyl)acetamide (p-Aminoacetanilide)
p-Aminoacetanilide is an N-acetylated amino-phenol ether equivalent, with single oxygen function in acetamido group classifying under 2922.29.81.90. Intermediate for paracetamol and dyes. Acetyl doesn't constitute additional oxygen function.