Ethyl Acid Phosphate (EAP) from Canada
Ethyl acid phosphate is a monoester used in rust inhibitors and catalysts. HTS 2919.90.50 includes it as 'other' phosphoric ester, covering partial esters and lactophosphates. The acidic P-OH group characterizes it within the heading.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify acid value and mono/di ester ratio; pH testing prevents salt misclassification
• Corrosive UN 3265 labeling required; avoid Chapter 28 inorganic acid error
• For metalworking fluids, declare ester content > principal component