Synthetic Fused Silica Boule from Japan
A cylindrical boule of synthetic fused silica created via flame hydrolysis or electric fusion, serving as stock material for semiconductor and UV optic manufacturing. Classified in HTS 7001.00.10.00 because it is glass in the mass of fused silica, unworked except for annealing.
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
• Obtain supplier specs confirming electric or flame fusion process to distinguish from natural quartz
• Ensure boule diameter and weight documentation; oversized pieces must still qualify as 'in the mass' pre-working
• Comply with REACH-like certifications for trace metals, as semiconductor grades demand ultra-low impurities