Nordihydroguaiaretic Acid (NDGA) from Japan
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.
Duty Rate — Japan → Canada
0%
Import Tips
• 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
• For pharmaceutical research quantities, a certificate of analysis and end-use statement may help CBSA classification
• Ensure the product is not mixed with other substances, as Chapter 29 applies only to separate chemically defined compounds