Congo Red Direct Red 83 Analytical Grade from United States
Congo Red (Direct Red 83) analytical grade is a high-purity dye used as a pH indicator and amyloid stain in microscopy. Despite its laboratory use, it is classified as synthetic organic colouring matter and a direct dye, falling under tariff item 3204.14.00.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the product is labeled as a direct dye for classification
• Provide a certificate of analysis for analytical grade purity
• Verify compliance with Canadian chemical regulations for laboratory use