Tetra-O-Acetyl-D-Ribose from Mexico
Tetra-O-acetyl-D-ribose is a protected ribose sugar ester used in nucleoside analog synthesis for antiviral drugs. Classified HTS 2940.00.60.00 as chemically pure sugar ester not covered by headings 2937-2939. The four acetate groups protect hydroxyls during selective chemical manipulation.
Duty Rate — Mexico → United States
15.8%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Specify anomeric mixture ratio (alpha/beta) in CoA; DEA watch list for nucleoside precursors - ensure end-use statement; Store below 0°C to maintain anomeric integrity during transit