USP-Grade Cream of Tartar Crystals from Mexico
Pharmaceutical-grade potassium bitartrate meeting USP standards for use in compounding prescriptions and as a laxative or antacid ingredient. Classified under HTS 2918.13.2000 as the specific potassium salt of tartaric acid per Chapter 29 note (A) for salts of acid-function compounds. Supplied in crystalline form with stabilizer for purity preservation during transport.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include USP CoA and DMF if used in drugs; FDA prior notice required via PALS system for pharma intermediates
• Avoid anti-caking agents >1% as they trigger Chapter 29 note (g) reclassification to mixtures