Methylphosphonyl Difluoride Stabilized Solution from Mexico
Stabilized methylphosphonyl difluoride solution contains CH3P(O)F2 with added anticaking agent for safe transport. Permitted under HTS 2931.59.00.15 per Chapter Note (f) as the stabilizer is solely for preservation, maintaining classification as the pure chemically defined compound. Used in controlled laboratory reagent applications.
Duty Rate — Mexico → United States
13.7%
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
• Declare stabilizer <1% and purpose (transport only) to avoid 3824 mixture reclassification
• Use DOT SP 149 for stabilized fluorides; improper marking leads to carrier refusal
• Provide stabilizer composition to CBP Chemistry Lab if requested during exam