Triphenyl Antimony from Mexico
Triphenyl antimony (SbPh3) features antimony-carbon bonds characteristic of organo-inorganic compounds in heading 2931. Used as a catalyst in PET resin production and flame retardant intermediate. Falls in 2931.90.90 as it doesn't match specific organo-inorganic subheadings.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide TSCA certification; antimony compounds require Section 8 reporting for volumes >10,000 lbs/year
• Solid material but toxic dust hazard—requires NIOSH-approved respirators for handling documentation
• Common misclassification as 2835 antimony salts; insist on 2931 organometallic classification