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Products described in additional U.S. note 3 to section VI

Heterocyclic compounds with oxygen hetero-atom(s) only: > Other: > Other: > Aromatic: > Other: > Products described in additional U.S. note 3 to section VI

Duty Rate (from China)

6.5%
MFN Base Rate6.5%
9903.03.03+0%

Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

Total Effective Rate6.5%
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Products classified under HTS 2932.99.61.00

Dioxolane

Dioxolane is a five-membered heterocyclic ring compound containing two oxygen hetero-atoms, classified under HTS 2932.99.61.00 as an aromatic heterocyclic compound with oxygen hetero-atoms only and specified in additional U.S. note 3 to section VI. It is commonly used as a solvent and intermediate in organic synthesis.

1,4-Dioxane

1,4-Dioxane is a six-membered heterocyclic ring with two oxygen atoms in 1,4 positions, falling under HTS 2932.99.61.00 as an aromatic heterocyclic compound specified in additional U.S. note 3. It serves as an important solvent in pharmaceuticals and chemical manufacturing.

Tetrahydrofuran (THF)

Tetrahydrofuran is a five-membered heterocyclic ether with one oxygen atom, classified in HTS 2932.99.61.00 per additional U.S. note 3 to section VI. Widely used as a solvent in Grignard reactions and polymer synthesis.

Morpholine

Morpholine features a six-membered heterocyclic ring with one oxygen and one nitrogen atom, but classified under oxygen heterocycle provisions of HTS 2932.99.61.00 when specified in additional U.S. note 3. Used in rubber curing and corrosion inhibition.

2-Methyltetrahydrofuran

2-Methyltetrahydrofuran is a substituted derivative of tetrahydrofuran, listed under HTS 2932.99.61.00 as a heterocyclic oxygen compound per additional U.S. note 3. Used as green solvent alternative in pharmaceutical manufacturing.

Furan

Furan is an aromatic five-membered heterocyclic compound with one oxygen hetero-atom, classified under HTS 2932.99.61.00 as specified in additional U.S. note 3. Used in resin production and as a solvent.

Gamma-Butyrolactone (GBL)

Gamma-butyrolactone is a five-membered lactone ring classified as a heterocyclic oxygen compound under HTS 2932.99.61.00 per additional U.S. note 3. Used as solvent and precursor in pharmaceutical synthesis.

1,3-Dioxolane

1,3-Dioxolane is a cyclic acetal with two oxygen hetero-atoms in a five-membered ring, falling under HTS 2932.99.61.00 as specified in additional U.S. note 3. Used in polymer production and adhesives.