Technical Grade P4S3 Flakes from Mexico
Technical grade phosphorus sesquisulfide (P4S3) in flake form serves as a key intermediate in pesticide and lubricant additive production. Classified under HTS 2813.90.50.00 as 'other' commercial phosphorus trisulfide, a nonmetal sulfide excluded from organic chapters. It is highly flammable and requires inert atmosphere storage.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Declare exact CAS# 1314-85-2 and batch purity analysis; use nitrogen-purged containers to prevent autoignition; watch for reclassification if moisture content exceeds 0.5% suggesting preparation status