Fuming Sulfonitric Acid Mixture from Mexico
Fuming sulfonitric acid mixture is a solution of concentrated nitric and sulfuric acids in the form of nitrosylsulfuric acid, used in nitration processes. As a sulfonitric acid, it is specifically named in tariff item 2808.00.00, which covers both nitric acid and sulphonitric acids. The product is inorganic and chemically defined, meeting the criteria of Chapter 28 notes.
Duty Rate — Mexico → Canada
Import Tips
• Clearly document the chemical composition, especially the ratio of nitric to sulfuric acid, to demonstrate it is a sulfonitric acid rather than a simple mixture
• Be aware that fuming acids may be classified as dangerous goods; ensure proper shipping documentation and labelling are provided to the CBSA
• If the product is used in explosives manufacturing, verify if an import permit from Natural Resources Canada is required