2-Hydroxyethyl Methacrylate (HEMA)
2-Hydroxyethyl methacrylate (HEMA) is a functional monomer with both acrylate ester and hydroxyl groups, used in hydrogels and contact lenses. It falls under HTS 2916.14.20 as an 'other' methacrylic ester per Chapter 29 ester classification rules prioritizing acid-function heading. The compound remains a separate chemically defined organic compound.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 3.7% | +35.0% | 38.7% |
| 🇲🇽Mexico | 3.7% | +10.0% | 13.7% |
| 🇨🇦Canada | 3.7% | +10.0% | 13.7% |
| 🇩🇪Germany | 3.7% | +10.0% | 13.7% |
| 🇯🇵Japan | 3.7% | +10.0% | 13.7% |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If as polymeric hydrogel precursor
Polymer forms classify in Chapter 39 acrylic polymers; HEMA monomer stays Chapter 29.
If classified by oxygen function alone
Chapter notes specify 'oxygen function' restricted; ester function governs over alcohol.
If in aqueous solution >50% for contact lens production
Solutions exceeding transport/stabilizer exceptions classify as mixtures in 3824.
Not sure which classification is right?
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Import Tips & Compliance
• Residual ethylene oxide testing (<10 ppm) required for biocompatibility applications
• Hydroxyl value certification confirms functional group integrity
• Biohazard labeling if medical-grade purity; standard industrial grade simpler
Related Products under HTS 2916.14.20
Methyl Methacrylate Monomer
Methyl methacrylate (MMA) is the methyl ester of methacrylic acid, a clear, volatile liquid used primarily in the production of acrylic polymers and resins. It falls under HTS 2916.14.20 as an 'other' ester of methacrylic acid, being an unsaturated acyclic monocarboxylic acid derivative. This chemically defined organic compound is essential for manufacturing PMMA plastics like Plexiglas.
Ethyl Methacrylate
Ethyl methacrylate is an ester of methacrylic acid used in coatings, adhesives, and specialty resins. As an unsaturated acyclic monocarboxylic acid ester, it qualifies under HTS 2916.14.20 'other' category per Chapter 29 note on ester classification by numerical order. The compound remains chemically defined without impurities affecting its primary classification.
Butyl Methacrylate
Butyl methacrylate, the butyl ester of methacrylic acid, serves as a reactive diluent in radiation-curable coatings and printing inks. It classifies under HTS 2916.14.20 as an 'other' methacrylic acid ester, adhering to Chapter 29 rules for unsaturated acyclic monocarboxylic acid derivatives. Its low volatility makes it suitable for industrial formulations.
2-Ethylhexyl Methacrylate
2-Ethylhexyl methacrylate is a branched-chain ester used in pressure-sensitive adhesives and elastomers. This 'other' methacrylic acid ester under HTS 2916.14.20 fits Chapter 29 as it's a separate chemically defined compound without excluded impurities. Its plasticizing properties enhance polymer flexibility.
Isobornyl Methacrylate
Isobornyl methacrylate, derived from methacrylic acid and isoborneol, provides hardness in UV-curable coatings and dental composites. Classified as 'other' under HTS 2916.14.20, it meets Chapter 29 criteria for cyclic alcohol esters of acyclic acids by later numerical order rule. Its high Tg enhances cured film properties.
Glycidyl Methacrylate
Glycidyl methacrylate (GMA) features an epoxide ring for crosslinking in powder coatings and composites. As a methacrylic acid ester derivative, it classifies under HTS 2916.14.20 'other,' compliant with Chapter 29 exclusion of epoxides only for ring-position heteroatoms. The ester function determines primary classification.