Methacrylamide with MEHQ Stabilizer from Mexico
Methacrylamide stabilized with 100-400 ppm MEHQ (monomethyl ether hydroquinone) to prevent polymerization during storage/transport. Permissible stabilizer per Chapter 29 note (f); remains classified as pure methacrylamide under 2924.19.11.30.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6096.3%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
• Specify stabilizer concentration and chemical identity in SDS; levels > permitted trigger 3824 classification
• Verify stabilizer doesn't impart specific end-use properties per Chapter note (g)
• Monitor shelf life declarations; expired stabilizer leads to hazardous material denial