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2921.43.90/Toluidine Blue O (Basic Blue 17)/Canada

Toluidine Blue O (Basic Blue 17) from Canada

Toluidine Blue O is a thiazine dye derived from toluidine, used in histology and microbiology staining. While primarily a colorant, its toluidine base and chemical purity qualify it under HTS 2921.43.90 rather than Chapter 32 when imported as pure compound. Pharmaceutical grade requires >85% purity.

Duty Rate — Canada → United States

16.5%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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Import Tips

• Provide dye index number (C.I. 52040) and absorption spectrum for identity confirmation

• Pharma grade requires USP/NF certificate; technical grade may face 3204 scrutiny

• Declare metachromatic staining end-use to support Chapter 29 classification

Toluidine Blue O (Basic Blue 17) from Canada — Import Duty Rate | HTS 2921.43.90