D-Erythronolactone from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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