Tetraethylene Glycol Dimethyl Ether from Mexico
Tetraethylene glycol dimethyl ether (Tetraglyme) used as a polar aprotic solvent in batteries and extractions. While technically a diether, classified under ether-alcohols broadly in HTS 2909.49.60.00 for glycol ether series. Chemically defined per Chapter notes.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6094.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Distinguish from hemiacetals by providing IR spectrum showing no O-H stretch
• High boiling point (275°C) requires heat-stabilized packaging for transport
• Document <0.1% water content to maintain chemical stability classification