Treponema pallidum Antigen Test from China
TPPA (Treponema pallidum particle agglutination) reagents containing immobilized T. pallidum antigens on gelatin particles. Confirmatory syphilis serology for clinical laboratories. HTS 3822.19.0030 classification for spirochete antigen diagnostic reagents.
Duty Rate — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include RPR/VDRL confirmatory correlation studies and specificity data
• Document gelatin particle backing uniformity and stability
• Provide CDC syphilis staging interpretation guidelines