1,3,3-Trimethyl-2-Methyleneindoline from Mexico
1,3,3-Trimethyl-2-methyleneindoline is an indoline derivative explicitly listed under HTS 2933.99.08.00 as an aromatic heterocyclic compound with nitrogen hetero-atoms. It serves as a key intermediate in the production of photochromic dyes and optical brighteners. The compound's methylene group enables specific reactivity in dye synthesis.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide NMR or HPLC analysis confirming structure matches exact HTS specification
• Register under TSCA if new to US inventory; include PMN status if applicable
• Watch for reclassification as indoline base (2933.99.97) if purity questioned