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2921.43.90.90/Toluidine Blue O/Mexico

Toluidine Blue O from Mexico

Toluidine Blue O (C15H16ClN3S) is a thiazine dye derived from toluidine, but as a chemically defined compound primarily used as biological stain, classified under HTS 2921.43.90.90. Not excluded as retail coloring matter.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Include CAS 92-31-9 and dye index CI 52040; prove not 'put up for retail sale' per Chapter Note 2(g)

• Lab chemical imports require end-user certificates to prevent diversion to textile use

• Verify no metal coordination that shifts to later Chapter 29 coordination compounds

Toluidine Blue O from Mexico — Import Duty Rate | HTS 2921.43.90.90