3-Aminocrotonic Acid Methyl Ester Hydrochloride Salt from China
The hydrochloride salt of 3-aminocrotonic acid methyl ester, classified with the parent ester under HTS 2922.49.60.00 per chapter note 3(C)(1). This stabilized form is commonly used in pharmaceutical manufacturing to improve handling and solubility. It maintains the amino-ester oxygen function characteristic of heading 2922.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Declare salt content percentage; classified with parent compound but affects purity calculations
• Ensure pH stability documentation for salt form during customs valuation