Photochromic Dye Intermediate Indoline from Japan
1,3,3-Trimethyl-2-methyleneindoline serves as a photochromic dye intermediate explicitly listed in HTS 2933.99.08.00. This nitrogen-heterocyclic compound reacts with spiropyrans to create color-changing materials for lenses and inks. Its aromatic indoline structure defines its Chapter 29 classification.
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
• Include intended end-use declaration specifying dye intermediate function
• Provide stability data showing no inherent color (distinguishing from Chapter 32)