L-Arginine Free Base from Mexico
L-Arginine Free Base is used in nitric oxide supplements and wound healing formulations. Falls under HTS 2922.49.80.00 for basic amino acids with guanidino oxygen function limited to carboxyl.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Test for arginine-specific impurities; ensure cGMP for NO-booster claims; declare as GRAS substance