Methamidophos Reference Standard from China
High-purity methamidophos serves as an analytical reference under HTS 2930.80.00.00, matching the ISO organo-sulfur compound definition. Essential for quality control in agrochemical production.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify as >99% pure with chromatogram for reference material classification
• EPA exemption may apply for small quantities used in calibration
• Include end-use statement as 'research use only' to streamline clearance