High-Purity Refined Borax for Metallurgy from Mexico
High-purity refined disodium tetraborate used as flux in non-ferrous metal soldering and brazing. Under HTS 2840.19.00.00 as other refined borax, chemically defined per Chapter 28. Not a cermet or sintered carbide excluded by note 6(g).
Duty Rate — Mexico → United States
10.1%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Certify low impurity for flux grade; invoice specifies metallurgy end-use
• Pitfall: Flux mixtures become 3810.10
• Comply with OSHA boron handling