D-Erythronolactone from China

D-Erythronolactone is a four-carbon sugar lactone with five-membered oxygen ring, under HTS 2932.20.50.50. Used in carbohydrate chemistry and as chiral building block.

Duty Rate — China → United States

3.7%

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

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Import Tips

• Optical rotation specification confirms D-isomer vs L-isomer classification

• Research chemical exemption may apply; include institutional end-user certificates

• HPLC purity certificate prevents mixture classification issues