Nordihydroguaiaretic Acid (NDGA)
Nordihydroguaiaretic acid (NDGA) is a polyphenolic lignan with four hydroxyl groups, derived from the creosote bush or produced synthetically. It is used as an antioxidant in food preservation and in pharmaceutical research. As a chemically defined polyphenol not elsewhere specified, it is classified under the 'Other' tariff item of subheading 2907.29.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| π¨π³China | Free | β | Free |
| π²π½Mexico | Free | β | Free |
| πΊπΈUnited States | Free | β | Free |
| π©πͺGermany | Free | β | Free |
| π―π΅Japan | Free | β | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is considered a carboxylic acid derivative rather than a simple polyphenol
NDGA contains carboxylic acid groups; if these are the characteristic function, heading 29.18 for carboxylic acids may apply.
If derived from a botanical source and not chemically modified
Natural plant extracts may be classified in Chapter 13, though synthetic NDGA would remain in Chapter 29.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item β and can price the duty on it in the same conversation.
Import Tips & Compliance
β’ If NDGA is imported as a food additive, verify it is listed in Health Canada's List of Permitted Preservatives or obtain a novel food authorization
β’ For pharmaceutical research quantities, a certificate of analysis and end-use statement may help CBSA classification
β’ Ensure the product is not mixed with other substances, as Chapter 29 applies only to separate chemically defined compounds
Related Products under Tariff item 2907.29.00
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