Fumed Silica (Aerosil) from Japan
Fumed silica, also known as pyrogenic silica, is an ultra-fine, non-porous silicon dioxide produced by flame hydrolysis of silicon tetrachloride. Classified under HTS 2811.22.5000 as 'other' silicon dioxide due to its synthetic chemical definition and high purity.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide production process documentation (flame hydrolysis) to distinguish from precipitated types and avoid 3824 mixtures
• Declare surface area (BET, typically 50-400 m²/g) and aggregate structure to support chemical compound status