Dimethoxymethane (Methylal)
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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| šØš³China | 5.5% | +25.0% | 30.5% |
| š²š½Mexico | 5.5% | ā | 5.5% |
| šØš¦Canada | 5.5% | ā | 5.5% |
| š©šŖGermany | 5.5% | ā | 5.5% |
| šÆšµJapan | 5.5% | ā | 5.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing residual carbonyl functions from incomplete acetalization
Acetals with detectable aldehyde groups may classify under acyclic aldehydes instead.
If supplied as solvent mixture with >2% non-ether components
Mixtures not qualifying as chemically defined under Chapter 29 notes shift to preparations.
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Import Tips & Compliance
ā¢ Declare exact chemical composition and CAS number (109-87-5) on commercial invoice
ā¢ Provide flammability data and flash point for proper hazmat classification
ā¢ Avoid retail packaging that might reclassify under Chapter 38 preparations
Related Products under HTS 2909.19.18.00
Diethyl Ether (Ethyl Ether)
Diethyl ether is a colorless, highly volatile acyclic ether derived from monohydric ethyl alcohol, used primarily as a solvent and in organic synthesis. It falls under HTS 2909.19.18.00 as an acyclic ether of monohydric alcohols, not specifically provided for elsewhere in the subheading. This chemically defined compound meets Chapter 29 requirements for separate organic compounds.
Methyl Tert-Butyl Ether (MTBE)
MTBE is an acyclic ether produced from methanol (monohydric alcohol) and isobutylene, widely used as a gasoline oxygenate additive. Classified under HTS 2909.19.18.00 as 'other' ethers of monohydric alcohols, this chemically defined compound complies with Chapter 29 notes for acyclic ethers. It is not halogenated, sulfonated, or otherwise modified.
1-Methoxy-2-Propanol (Propylene Glycol Monomethyl Ether)
1-Methoxy-2-propanol is an acyclic ether-alcohol derived from monohydric methanol and propylene glycol, used in paints and coatings. While ether-alcohols have separate provisions, this specific isomer falls under 'other' acyclic ethers of monohydric alcohols at HTS 2909.19.18.00 per tariff structure. It meets Chapter 29 criteria for classification.
Diisopropyl Ether
Diisopropyl ether is a branched acyclic ether from monohydric isopropanol, used as an extraction solvent and gasoline stabilizer. It is classified under HTS 2909.19.18.00 as an 'other' acyclic ether of monohydric alcohols, meeting Chapter 29 requirements for chemically defined organic compounds. The isopropyl structure distinguishes it from linear ethers.
Ethyl Tert-Butyl Ether (ETBE)
ETBE is an acyclic ether of monohydric ethanol and tert-butanol, used as a high-octane biofuel oxygenate. Classified at HTS 2909.19.18.00 as 'other' acyclic ethers, this chemically defined compound complies with Chapter 29 exclusion criteria and numerical order rules. It serves similar function to MTBE but with ethanol base.
Butyl Methyl Ether
Butyl methyl ether is an acyclic mixed ether from monohydric butanol and methanol, used in organic synthesis and as a reaction medium. It falls under HTS 2909.19.18.00 as an 'other' ether of monohydric alcohols, satisfying Chapter 29 definitions for acyclic structures. The unsymmetrical structure distinguishes it from symmetrical dialkyl ethers.