</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Imidazole pH Indicator Base from Mexico

Imidazole employed as base for custom pH indicators in analytical chemistry, under HTS 2933.29.60.00 for its heterocyclic nitrogen structure. Titrates in acidic-basic transitions.

Duty Rate — Mexico → United States

10%

Rate breakdown

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

Import Tips

Ensure no added colorants violating chapter note (g); EPIRB declaration for lab use; purity >98% to avoid mixture status