Epoxidized Natural Rubber (ENR)
Epoxidized natural rubber (ENR) is natural rubber that has been chemically modified through epoxidation of its double bonds, enhancing oil resistance and damping properties for use in tire compounds and adhesives. It is supplied in primary forms such as latex or solid bales. As a chemically modified natural polymer, it falls under tariff item 3913.90.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the ENR is not chemically modified and remains natural rubber in primary forms
Unmodified natural rubber in smoked sheets or crepe forms falls under heading 40.01.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the ENR is in primary forms (latex, bales, or powder) and not further processed into articles
• Provide a detailed product description and technical data sheet to the CBSA to confirm the chemical modification
• Verify the applicable duty rate and any free trade agreements that may reduce or eliminate tariffs
Related Products under Tariff item 3913.90.00
Alginic Acid Powder
Alginic acid powder is a natural polymer extracted from brown seaweed, used in food gelling and pharmaceutical encapsulation. It is supplied in primary powder form. As a natural polymer not elsewhere specified, it falls under tariff item 3913.90.00.
Carboxymethyl Guar Gum
Carboxymethyl guar gum is a chemically modified derivative of guar gum, a natural polysaccharide, with carboxymethyl groups added to enhance water solubility for cosmetics and oil recovery applications. It is supplied in primary powder form. As a modified natural polymer, it is classified under tariff item 3913.90.00.
Carboxymethyl Starch Powder
Carboxymethyl starch powder is a starch derivative modified with carboxymethyl groups, used as a binder in paper and pharmaceutical tablets. It is supplied in primary powder form. As a chemically modified natural polymer, it falls under tariff item 3913.90.00.
Casein Modified Powder
Casein modified powder is chemically hardened casein protein derived from milk, used in industrial coatings and adhesives. It is supplied in primary powder form. As a hardened protein, a modified natural polymer, it is classified under tariff item 3913.90.00.
Cassia Gum Powder
Cassia gum powder derived from cassia tora seeds, a polysaccharide thickener for pet food and industrial applications, in primary powder form. This natural galactomannan polysaccharide derivative is classified under tariff item 3913.90.00 as a modified natural polymer in primary form, not elsewhere specified.
Chitosan Flakes
Chitosan flakes are a natural polymer derived from chitin through deacetylation, sourced from crustacean shells. They are used in water treatment and biomedical applications. Supplied in primary flake form, they qualify as a modified natural polymer under tariff item 3913.90.00.