Dimethoxymethane (Methylal) from Japan
Dimethoxymethane, also known as methylal, is the dimethyl acetal of formaldehyde and an acyclic ether of monohydric methanol. Used as a solvent and chemical intermediate, it qualifies under HTS 2909.19.18.00 as an 'other' acyclic ether of monohydric alcohols per Chapter 29 definitions. This excludes it from cyclic acetal provisions.
Duty Rate — Japan → United States
22%
Rate breakdown
9903.04.629.5%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Declare exact chemical composition and CAS number (109-87-5) on commercial invoice
• Provide flammability data and flash point for proper hazmat classification
• Avoid retail packaging that might reclassify under Chapter 38 preparations