Steel Mill Spent Pickling Liquor from Mexico
Hydrochloric acid waste from continuous steel pickling lines, containing high iron chloride concentrations. Under HTS 3825.50.00.00 as metal-pickling liquor waste, chapter note 6(d). Major source of ferrous chloride for water treatment.
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
• Specify regeneration potential (HCl recovery) in documentation
• Monitor free acid vs metal salt content ratio
• Use spent pickle liquor manifests for customs