Tetrahydrophthalic anhydride from Japan
Tetrahydrophthalic anhydride is a partially hydrogenated cyclanic polycarboxylic acid anhydride covered by HTS 2917.20.00.00. The cyclohexene ring structure qualifies as cyclenic per the heading description. Widely used in unsaturated polyester resins and alkyd coatings.
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
• Distinguish from fully aromatic phthalic anhydride via hydrogenation degree certificates
• Ensure ventilation requirements met for irritant dust during customs inspection
• Provide batch analysis confirming <0.5% phthalic anhydride impurity levels