Commercial n-Heptane (C7H16) from Mexico
n-Heptane is a straight-chain saturated acyclic hydrocarbon used as a standard reference fuel and solvent in chromatography and coatings. It qualifies for HTS 2901.10.5000 as a chemically defined C7 saturated acyclic hydrocarbon, 'other' category. Often includes polymerization inhibitors for stability.
Duty Rate — Mexico → United States
10%
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
• Submit Certificate of Analysis showing ≥95% n-heptane content to validate Chapter 29 classification
• Use IBC totes or drums certified for UN1262 flammable liquids; declare proper shipping name
• Monitor for anti-dusting agents that could invoke Chapter 29 note (g) but avoid use-specific additives