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
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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