2932.20.05.00/4-Methylumbelliferone (CAS 90-33-5)/Japan

4-Methylumbelliferone (CAS 90-33-5) from Japan

4-Methylumbelliferone (4-MU) is a methylcoumarin derivative classified in HTS 2932.20.0500 for its coumarin lactone structure. Widely used as a fluorogenic substrate in biochemical assays and as a laser dye.

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%

Calculate with your customs value Verify classification with AI

Import Tips

• Provide fluorescence emission spectra data to confirm identity for lab/research imports

• Declare if crystalline powder or solution form; pure compound stays in 2932

• Include end-use statements for research chemicals to avoid pharmaceutical scrutiny