Salt Cake (Sodium Sulfate Anhydrous) from Canada
Salt cake is the commercial name for disodium sulfate (Na2SO4) in its anhydrous form, produced as a by-product in chemical manufacturing processes like hydrochloric acid production. It falls under HTS 2833.11.10.00 as it is specifically defined as 'salt cake,' a crude or technical grade of sodium sulfate distinct from refined versions.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Verify purity levels as salt cake is typically under 99% Na2SO4 to avoid reclassification as refined sodium sulfate; obtain Certificate of Analysis from supplier
• Ensure bulk packaging complies with DOT hazardous material regs if moisture-reactive
• Common pitfall: mislabeling as 'Glauber's salt' which may shift to decahydrate subheading