4,4'-Methylenedianiline (MDA)
4,4'-Methylenedianiline is a diphenylmethane-based aromatic polyamine used in polyurethane production and epoxy curing agents. Classified under HTS 2921.59.4000 due to its status as a derivative of aromatic polyamines specified in additional U.S. note 3 to section VI.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 6.5% | +35.0% | 41.5% |
| 🇲🇽Mexico | 6.5% | +10.0% | 16.5% |
| 🇨🇦Canada | 6.5% | +10.0% | 16.5% |
| 🇩🇪Germany | 6.5% | +10.0% | 16.5% |
| 🇯🇵Japan | 6.5% | +10.0% | 16.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically listed in additional U.S. note 3
Other aromatic polyamine derivatives not subject to note 3 quotas classify earlier in 2921.59.
If pre-polymerized into polyether amines
Polymerized forms exceed the molecular weight or structure limits for Chapter 29 amines, moving to Chapter 39 polymers.
If for certain heterocyclic amine derivatives
If the molecule contains qualifying heterocyclic rings excluded from 2932-2934 notes, it shifts to heading 2933.
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Import Tips & Compliance
• Comply with TSCA regulations and provide safety data sheets due to MDA's carcinogenic classification
• Confirm quota eligibility under note 3; excess imports may face higher rates or denial
• Label shipments with exact chemical name and CAS (101-77-9) to prevent reclassification as a polymer precursor
Related Products under HTS 2921.59.40.00
p-Phenylenediamine
p-Phenylenediamine is an aromatic diamine used primarily as an intermediate in the production of polymers, dyes, and rubber antioxidants. It falls under HTS 2921.59.4000 as an aromatic polyamine derivative listed in additional U.S. note 3 to section VI, which specifies certain organic chemicals subject to quantitative limitations.
2,4-Diaminotoluene
2,4-Diaminotoluene is an aromatic polyamine serving as an intermediate for toluene diisocyanate (TDI) production and hair dyes. It qualifies for HTS 2921.59.4000 as a product enumerated in additional U.S. note 3 to section VI for this amine-function compound.
4,4'-Diaminodiphenylmethane
4,4'-Diaminodiphenylmethane, also known as DDM, is an aromatic polyamine used in epoxy resin curing and polyimide synthesis. It is covered by HTS 2921.59.4000 as a derivative specified in additional U.S. note 3 to section VI.
m-Phenylenediamine
m-Phenylenediamine is an aromatic diamine used in epoxy resins, polyurethanes, and as a dye intermediate. This product is classified in HTS 2921.59.4000 because it matches chemicals described in additional U.S. note 3 to section VI.
2,2'-Dichlorobenzidine
2,2'-Dichlorobenzidine is a halogenated aromatic polyamine used in azo pigment manufacturing. It falls under HTS 2921.59.4000 as a derivative listed in additional U.S. note 3, consistent with Chapter 29 provisions for halogenated amines.
3,3'-Dichloro-4,4'-diaminodiphenylmethane
This chlorinated aromatic polyamine serves as a curing agent for epoxy resins and polyurethane systems. Classified in HTS 2921.59.4000 per its inclusion in additional U.S. note 3 to section VI for specified aromatic amine derivatives.