4-Chloro-3-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid from Mexico
4-Chloro-3-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid is a complex chlorosulfonic pyrazole derivative featuring an unfused pyrazole ring with aromatic substitution. It is used primarily as a high-performance dye coupling agent. As a separate chemically defined organic compound with a nitrogen hetero-atom ring, it falls under tariff item 2933.19.00.
Duty Rate — Mexico → Canada
0%
Import Tips
• Ensure the product is imported as a pure chemical compound, not in a formulation that could shift classification
• Have the technical data sheet and CAS number ready for CBSA verification
• Confirm whether the dye coupling use triggers any end-use or chemical import reporting requirements