4-(2-Hydroethoxy)-1,3-Phenylene Diamine Dihydrochloride from Mexico
Dihydrochloride salt of a diaminobenzene derivative with hydroxyethoxy function, explicitly covered by HTS 2922.50.0700 as aromatic oxygen-function amino-compound. Key developer in low-ammonia permanent hair dyes.
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
• Salt form classifies with parent base per Ch. 29 note 3(C)(1); provide ionization proof in lab analysis
• TSCA pre-registration required for US manufacture; include intended cosmetic intermediate declaration
• Monitor for color change indicating degradation; import temperature <25°C recommended