3-Amino-3-methyl-1-butyne Pharmaceutical Grade from Mexico
High-purity 3-Amino-3-methyl-1-butyne meeting pharmaceutical standards, explicitly covered under HTS 2921.19.31.00 as a named acyclic monoamine. Used in synthesis of antiviral drugs and as a building block for alkyne-containing therapeutics. Purity >99% distinguishes it for regulated import.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include GMP or USP certificate to support pharma end-use and prevent scrutiny under general chemical headings
• Label with exact CAS number and batch purity to match HTS specific naming requirements
• Pre-register under TSCA if new importer; pharma intermediates often trigger EPA review