4,4'-Methylenebis(2-chloroaniline) (MOCA) from Mexico
4,4'-Methylenebis(2-chloroaniline), commonly known as MOCA, is an aromatic polyamine derivative used primarily as a curing agent in polyurethane elastomers. It falls under HTS 2921.59.80 as it is a derivative of aromatic polyamines (specifically a dianiline derivative) that does not fit into more specific subheadings within 2921.59. This classification aligns with chapter notes prioritizing the last numerical heading for amine-function compounds.
Duty Rate — Mexico → United States
Rate breakdown
Import Tips
• Verify chemical purity and provide Certificate of Analysis (CoA) to confirm it meets 'other' aromatic polyamine derivative criteria under Chapter 29 notes
• Include Safety Data Sheet (SDS) detailing toxicity (known carcinogen) for CBP review and compliance with TSCA import requirements
• Avoid misclassification as a simple diamine; ensure documentation specifies polyamine structure to prevent reclassification to 2921.51