4-Mercaptobenzoic Acid from Japan
4-Mercaptobenzoic acid features para-substituted mercapto and carboxylic groups on benzene ring. HTS 2930.90.4920 classification as aromatic mercaptocarboxylic acid per Chapter 29 organo-sulfur provisions. Utilized in nanotechnology and self-assembled monolayers.
Duty Rate — Japan → United States
4.2%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Require HPLC purity certificate >99%; CAS 107-91-5 for customs verification
• Static dissipative packaging required for nano-electronics grade material
• Avoid 2930.90.49.40 misclassification by confirming acid vs amide function