Hydroquinone Monomethyl Ether (MEHQ) from Canada
MEHQ inhibits polymerization in photographic gelatin emulsions and serves as an antioxidant in developer solutions. This methoxyhydroquinone derivative stabilizes aromatic compounds during processing. Classified under HTS 2934.99.20.00.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide polymerization inhibition test data for classification support
• Declare low moisture content to prevent clumping during customs inspection
• Distinguish from polymer additives through photographic end-use proof